diff --git a/src/script/index.ts b/src/script/index.ts
index b05b2c6d..262c4bd3 100644
--- a/src/script/index.ts
+++ b/src/script/index.ts
@@ -75,8 +75,15 @@ const PARENS = /^(\s*\()([\s\S]*?)(\)\s*)$/u
 const DUMMY_PARENT: any = {}
 
 // Like Vue, it judges whether it is a function expression or not.
-// https://github.com/vuejs/vue/blob/0948d999f2fddf9f90991956493f976273c5da1f/src/compiler/codegen/events.js#L3
-const IS_FUNCTION_EXPRESSION = /^\s*([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/u
+// https://github.com/vuejs/core/blob/fef2acb2049fce3407dff17fe8af1836b97dfd73/packages/compiler-core/src/transforms/vOn.ts#L19
+const IS_FUNCTION_EXPRESSION =
+    /^\s*([\w$_]+|(async\s*)?\([^)]*?\))\s*(:[^=]+)?=>|^\s*(async\s+)?function(?:\s+[\w$]+)?\s*\(/u
+//        ^^^^^^^ omit paren argument                                 ^^^^^^^^ function keyword
+//                 ^^^^^ <--- async keyword (optional) ---> ^^^^^
+//                           ^^------^^ arguments with parens                       ^^^^^^ named function (optional)
+//                                         ^^^^^^^^^ return types (optional)
+//                                                  ^^ arrow                                   ^^ opening paren
+
 const IS_SIMPLE_PATH =
     /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?'\]|\["[^"]*?"\]|\[\d+\]|\[[A-Za-z_$][\w$]*\])*$/u
 
diff --git a/test/fixtures/ast/v-on-async-arrow-function-expression/ast.json b/test/fixtures/ast/v-on-async-arrow-function-expression/ast.json
new file mode 100644
index 00000000..17fa8149
--- /dev/null
+++ b/test/fixtures/ast/v-on-async-arrow-function-expression/ast.json
@@ -0,0 +1,829 @@
+{
+    "type": "Program",
+    "start": 0,
+    "end": 0,
+    "loc": {
+        "start": {
+            "line": 1,
+            "column": 0
+        },
+        "end": {
+            "line": 1,
+            "column": 0
+        }
+    },
+    "range": [
+        0,
+        0
+    ],
+    "body": [],
+    "sourceType": "script",
+    "comments": [],
+    "tokens": [],
+    "templateBody": {
+        "type": "VElement",
+        "range": [
+            0,
+            77
+        ],
+        "loc": {
+            "start": {
+                "line": 1,
+                "column": 0
+            },
+            "end": {
+                "line": 3,
+                "column": 11
+            }
+        },
+        "name": "template",
+        "rawName": "template",
+        "namespace": "http://www.w3.org/1999/xhtml",
+        "startTag": {
+            "type": "VStartTag",
+            "range": [
+                0,
+                10
+            ],
+            "loc": {
+                "start": {
+                    "line": 1,
+                    "column": 0
+                },
+                "end": {
+                    "line": 1,
+                    "column": 10
+                }
+            },
+            "selfClosing": false,
+            "attributes": []
+        },
+        "children": [
+            {
+                "type": "VText",
+                "range": [
+                    10,
+                    15
+                ],
+                "loc": {
+                    "start": {
+                        "line": 1,
+                        "column": 10
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 4
+                    }
+                },
+                "value": "\n    "
+            },
+            {
+                "type": "VElement",
+                "range": [
+                    15,
+                    65
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 4
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 54
+                    }
+                },
+                "name": "button",
+                "rawName": "button",
+                "namespace": "http://www.w3.org/1999/xhtml",
+                "startTag": {
+                    "type": "VStartTag",
+                    "range": [
+                        15,
+                        56
+                    ],
+                    "loc": {
+                        "start": {
+                            "line": 2,
+                            "column": 4
+                        },
+                        "end": {
+                            "line": 2,
+                            "column": 45
+                        }
+                    },
+                    "selfClosing": false,
+                    "attributes": [
+                        {
+                            "type": "VAttribute",
+                            "range": [
+                                23,
+                                55
+                            ],
+                            "loc": {
+                                "start": {
+                                    "line": 2,
+                                    "column": 12
+                                },
+                                "end": {
+                                    "line": 2,
+                                    "column": 44
+                                }
+                            },
+                            "directive": true,
+                            "key": {
+                                "type": "VDirectiveKey",
+                                "range": [
+                                    23,
+                                    29
+                                ],
+                                "loc": {
+                                    "start": {
+                                        "line": 2,
+                                        "column": 12
+                                    },
+                                    "end": {
+                                        "line": 2,
+                                        "column": 18
+                                    }
+                                },
+                                "name": {
+                                    "type": "VIdentifier",
+                                    "range": [
+                                        23,
+                                        24
+                                    ],
+                                    "loc": {
+                                        "start": {
+                                            "column": 12,
+                                            "line": 2
+                                        },
+                                        "end": {
+                                            "column": 13,
+                                            "line": 2
+                                        }
+                                    },
+                                    "name": "on",
+                                    "rawName": "@"
+                                },
+                                "argument": {
+                                    "type": "VIdentifier",
+                                    "range": [
+                                        24,
+                                        29
+                                    ],
+                                    "loc": {
+                                        "start": {
+                                            "column": 13,
+                                            "line": 2
+                                        },
+                                        "end": {
+                                            "column": 18,
+                                            "line": 2
+                                        }
+                                    },
+                                    "name": "click",
+                                    "rawName": "click"
+                                },
+                                "modifiers": []
+                            },
+                            "value": {
+                                "type": "VExpressionContainer",
+                                "range": [
+                                    30,
+                                    55
+                                ],
+                                "loc": {
+                                    "start": {
+                                        "line": 2,
+                                        "column": 19
+                                    },
+                                    "end": {
+                                        "line": 2,
+                                        "column": 44
+                                    }
+                                },
+                                "expression": {
+                                    "type": "ArrowFunctionExpression",
+                                    "start": 31,
+                                    "end": 54,
+                                    "loc": {
+                                        "start": {
+                                            "line": 2,
+                                            "column": 20
+                                        },
+                                        "end": {
+                                            "line": 2,
+                                            "column": 43
+                                        }
+                                    },
+                                    "range": [
+                                        31,
+                                        54
+                                    ],
+                                    "id": null,
+                                    "expression": true,
+                                    "generator": false,
+                                    "async": true,
+                                    "params": [],
+                                    "body": {
+                                        "type": "AwaitExpression",
+                                        "start": 43,
+                                        "end": 54,
+                                        "loc": {
+                                            "start": {
+                                                "line": 2,
+                                                "column": 32
+                                            },
+                                            "end": {
+                                                "line": 2,
+                                                "column": 43
+                                            }
+                                        },
+                                        "range": [
+                                            43,
+                                            54
+                                        ],
+                                        "argument": {
+                                            "type": "CallExpression",
+                                            "start": 49,
+                                            "end": 54,
+                                            "loc": {
+                                                "start": {
+                                                    "line": 2,
+                                                    "column": 38
+                                                },
+                                                "end": {
+                                                    "line": 2,
+                                                    "column": 43
+                                                }
+                                            },
+                                            "range": [
+                                                49,
+                                                54
+                                            ],
+                                            "callee": {
+                                                "type": "Identifier",
+                                                "start": 49,
+                                                "end": 52,
+                                                "loc": {
+                                                    "start": {
+                                                        "line": 2,
+                                                        "column": 38
+                                                    },
+                                                    "end": {
+                                                        "line": 2,
+                                                        "column": 41
+                                                    }
+                                                },
+                                                "range": [
+                                                    49,
+                                                    52
+                                                ],
+                                                "name": "act"
+                                            },
+                                            "arguments": [],
+                                            "optional": false
+                                        }
+                                    }
+                                },
+                                "references": [
+                                    {
+                                        "id": {
+                                            "type": "Identifier",
+                                            "start": 49,
+                                            "end": 52,
+                                            "loc": {
+                                                "start": {
+                                                    "line": 2,
+                                                    "column": 38
+                                                },
+                                                "end": {
+                                                    "line": 2,
+                                                    "column": 41
+                                                }
+                                            },
+                                            "range": [
+                                                49,
+                                                52
+                                            ],
+                                            "name": "act"
+                                        },
+                                        "mode": "r"
+                                    }
+                                ]
+                            }
+                        }
+                    ]
+                },
+                "children": [],
+                "endTag": {
+                    "type": "VEndTag",
+                    "range": [
+                        56,
+                        65
+                    ],
+                    "loc": {
+                        "start": {
+                            "line": 2,
+                            "column": 45
+                        },
+                        "end": {
+                            "line": 2,
+                            "column": 54
+                        }
+                    }
+                },
+                "variables": []
+            },
+            {
+                "type": "VText",
+                "range": [
+                    65,
+                    66
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 54
+                    },
+                    "end": {
+                        "line": 3,
+                        "column": 0
+                    }
+                },
+                "value": "\n"
+            }
+        ],
+        "endTag": {
+            "type": "VEndTag",
+            "range": [
+                66,
+                77
+            ],
+            "loc": {
+                "start": {
+                    "line": 3,
+                    "column": 0
+                },
+                "end": {
+                    "line": 3,
+                    "column": 11
+                }
+            }
+        },
+        "variables": [],
+        "tokens": [
+            {
+                "type": "HTMLTagOpen",
+                "range": [
+                    0,
+                    9
+                ],
+                "loc": {
+                    "start": {
+                        "line": 1,
+                        "column": 0
+                    },
+                    "end": {
+                        "line": 1,
+                        "column": 9
+                    }
+                },
+                "value": "template"
+            },
+            {
+                "type": "HTMLTagClose",
+                "range": [
+                    9,
+                    10
+                ],
+                "loc": {
+                    "start": {
+                        "line": 1,
+                        "column": 9
+                    },
+                    "end": {
+                        "line": 1,
+                        "column": 10
+                    }
+                },
+                "value": ""
+            },
+            {
+                "type": "HTMLWhitespace",
+                "range": [
+                    10,
+                    15
+                ],
+                "loc": {
+                    "start": {
+                        "line": 1,
+                        "column": 10
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 4
+                    }
+                },
+                "value": "\n    "
+            },
+            {
+                "type": "HTMLTagOpen",
+                "range": [
+                    15,
+                    22
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 4
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 11
+                    }
+                },
+                "value": "button"
+            },
+            {
+                "type": "Punctuator",
+                "range": [
+                    23,
+                    24
+                ],
+                "loc": {
+                    "start": {
+                        "column": 12,
+                        "line": 2
+                    },
+                    "end": {
+                        "column": 13,
+                        "line": 2
+                    }
+                },
+                "value": "@"
+            },
+            {
+                "type": "HTMLIdentifier",
+                "range": [
+                    24,
+                    29
+                ],
+                "loc": {
+                    "start": {
+                        "column": 13,
+                        "line": 2
+                    },
+                    "end": {
+                        "column": 18,
+                        "line": 2
+                    }
+                },
+                "value": "click"
+            },
+            {
+                "type": "HTMLAssociation",
+                "range": [
+                    29,
+                    30
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 18
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 19
+                    }
+                },
+                "value": ""
+            },
+            {
+                "type": "Punctuator",
+                "range": [
+                    30,
+                    31
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 19
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 20
+                    }
+                },
+                "value": "\""
+            },
+            {
+                "type": "Identifier",
+                "value": "async",
+                "start": 31,
+                "end": 36,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 20
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 25
+                    }
+                },
+                "range": [
+                    31,
+                    36
+                ]
+            },
+            {
+                "type": "Punctuator",
+                "value": "(",
+                "start": 37,
+                "end": 38,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 26
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 27
+                    }
+                },
+                "range": [
+                    37,
+                    38
+                ]
+            },
+            {
+                "type": "Punctuator",
+                "value": ")",
+                "start": 38,
+                "end": 39,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 27
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 28
+                    }
+                },
+                "range": [
+                    38,
+                    39
+                ]
+            },
+            {
+                "type": "Punctuator",
+                "value": "=>",
+                "start": 40,
+                "end": 42,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 29
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 31
+                    }
+                },
+                "range": [
+                    40,
+                    42
+                ]
+            },
+            {
+                "type": "Identifier",
+                "value": "await",
+                "start": 43,
+                "end": 48,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 32
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 37
+                    }
+                },
+                "range": [
+                    43,
+                    48
+                ]
+            },
+            {
+                "type": "Identifier",
+                "value": "act",
+                "start": 49,
+                "end": 52,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 38
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 41
+                    }
+                },
+                "range": [
+                    49,
+                    52
+                ]
+            },
+            {
+                "type": "Punctuator",
+                "value": "(",
+                "start": 52,
+                "end": 53,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 41
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 42
+                    }
+                },
+                "range": [
+                    52,
+                    53
+                ]
+            },
+            {
+                "type": "Punctuator",
+                "value": ")",
+                "start": 53,
+                "end": 54,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 42
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 43
+                    }
+                },
+                "range": [
+                    53,
+                    54
+                ]
+            },
+            {
+                "type": "Punctuator",
+                "range": [
+                    54,
+                    55
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 43
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 44
+                    }
+                },
+                "value": "\""
+            },
+            {
+                "type": "HTMLTagClose",
+                "range": [
+                    55,
+                    56
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 44
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 45
+                    }
+                },
+                "value": ""
+            },
+            {
+                "type": "HTMLEndTagOpen",
+                "range": [
+                    56,
+                    64
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 45
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 53
+                    }
+                },
+                "value": "button"
+            },
+            {
+                "type": "HTMLTagClose",
+                "range": [
+                    64,
+                    65
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 53
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 54
+                    }
+                },
+                "value": ""
+            },
+            {
+                "type": "HTMLWhitespace",
+                "range": [
+                    65,
+                    66
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 54
+                    },
+                    "end": {
+                        "line": 3,
+                        "column": 0
+                    }
+                },
+                "value": "\n"
+            },
+            {
+                "type": "HTMLEndTagOpen",
+                "range": [
+                    66,
+                    76
+                ],
+                "loc": {
+                    "start": {
+                        "line": 3,
+                        "column": 0
+                    },
+                    "end": {
+                        "line": 3,
+                        "column": 10
+                    }
+                },
+                "value": "template"
+            },
+            {
+                "type": "HTMLTagClose",
+                "range": [
+                    76,
+                    77
+                ],
+                "loc": {
+                    "start": {
+                        "line": 3,
+                        "column": 10
+                    },
+                    "end": {
+                        "line": 3,
+                        "column": 11
+                    }
+                },
+                "value": ""
+            },
+            {
+                "type": "HTMLWhitespace",
+                "range": [
+                    77,
+                    78
+                ],
+                "loc": {
+                    "start": {
+                        "line": 3,
+                        "column": 11
+                    },
+                    "end": {
+                        "line": 4,
+                        "column": 0
+                    }
+                },
+                "value": "\n"
+            }
+        ],
+        "comments": [],
+        "errors": []
+    }
+}
\ No newline at end of file
diff --git a/test/fixtures/ast/v-on-async-arrow-function-expression/source.vue b/test/fixtures/ast/v-on-async-arrow-function-expression/source.vue
new file mode 100644
index 00000000..9cdad449
--- /dev/null
+++ b/test/fixtures/ast/v-on-async-arrow-function-expression/source.vue
@@ -0,0 +1,3 @@
+<template>
+    <button @click="async () => await act()"></button>
+</template>
diff --git a/test/fixtures/ast/v-on-async-arrow-function-expression/token-ranges.json b/test/fixtures/ast/v-on-async-arrow-function-expression/token-ranges.json
new file mode 100644
index 00000000..032294ca
--- /dev/null
+++ b/test/fixtures/ast/v-on-async-arrow-function-expression/token-ranges.json
@@ -0,0 +1,26 @@
+[
+    "<template",
+    ">",
+    "\n    ",
+    "<button",
+    "@",
+    "click",
+    "=",
+    "\"",
+    "async",
+    "(",
+    ")",
+    "=>",
+    "await",
+    "act",
+    "(",
+    ")",
+    "\"",
+    ">",
+    "</button",
+    ">",
+    "\n",
+    "</template",
+    ">",
+    "\n"
+]
\ No newline at end of file
diff --git a/test/fixtures/ast/v-on-async-arrow-function-expression/tree.json b/test/fixtures/ast/v-on-async-arrow-function-expression/tree.json
new file mode 100644
index 00000000..d272edfa
--- /dev/null
+++ b/test/fixtures/ast/v-on-async-arrow-function-expression/tree.json
@@ -0,0 +1,96 @@
+[
+    {
+        "type": "VElement",
+        "text": "<template>\n    <button @click=\"async () => await act()\"></button>\n</template>",
+        "children": [
+            {
+                "type": "VStartTag",
+                "text": "<template>",
+                "children": []
+            },
+            {
+                "type": "VText",
+                "text": "\n    ",
+                "children": []
+            },
+            {
+                "type": "VElement",
+                "text": "<button @click=\"async () => await act()\"></button>",
+                "children": [
+                    {
+                        "type": "VStartTag",
+                        "text": "<button @click=\"async () => await act()\">",
+                        "children": [
+                            {
+                                "type": "VAttribute",
+                                "text": "@click=\"async () => await act()\"",
+                                "children": [
+                                    {
+                                        "type": "VDirectiveKey",
+                                        "text": "@click",
+                                        "children": [
+                                            {
+                                                "type": "VIdentifier",
+                                                "text": "@",
+                                                "children": []
+                                            },
+                                            {
+                                                "type": "VIdentifier",
+                                                "text": "click",
+                                                "children": []
+                                            }
+                                        ]
+                                    },
+                                    {
+                                        "type": "VExpressionContainer",
+                                        "text": "\"async () => await act()\"",
+                                        "children": [
+                                            {
+                                                "type": "ArrowFunctionExpression",
+                                                "text": "async () => await act()",
+                                                "children": [
+                                                    {
+                                                        "type": "AwaitExpression",
+                                                        "text": "await act()",
+                                                        "children": [
+                                                            {
+                                                                "type": "CallExpression",
+                                                                "text": "act()",
+                                                                "children": [
+                                                                    {
+                                                                        "type": "Identifier",
+                                                                        "text": "act",
+                                                                        "children": []
+                                                                    }
+                                                                ]
+                                                            }
+                                                        ]
+                                                    }
+                                                ]
+                                            }
+                                        ]
+                                    }
+                                ]
+                            }
+                        ]
+                    },
+                    {
+                        "type": "VEndTag",
+                        "text": "</button>",
+                        "children": []
+                    }
+                ]
+            },
+            {
+                "type": "VText",
+                "text": "\n",
+                "children": []
+            },
+            {
+                "type": "VEndTag",
+                "text": "</template>",
+                "children": []
+            }
+        ]
+    }
+]
\ No newline at end of file
diff --git a/test/fixtures/ast/v-on-async-function-expression/ast.json b/test/fixtures/ast/v-on-async-function-expression/ast.json
new file mode 100644
index 00000000..447b74bf
--- /dev/null
+++ b/test/fixtures/ast/v-on-async-function-expression/ast.json
@@ -0,0 +1,909 @@
+{
+    "type": "Program",
+    "start": 0,
+    "end": 0,
+    "loc": {
+        "start": {
+            "line": 1,
+            "column": 0
+        },
+        "end": {
+            "line": 1,
+            "column": 0
+        }
+    },
+    "range": [
+        0,
+        0
+    ],
+    "body": [],
+    "sourceType": "script",
+    "comments": [],
+    "tokens": [],
+    "templateBody": {
+        "type": "VElement",
+        "range": [
+            0,
+            86
+        ],
+        "loc": {
+            "start": {
+                "line": 1,
+                "column": 0
+            },
+            "end": {
+                "line": 3,
+                "column": 11
+            }
+        },
+        "name": "template",
+        "rawName": "template",
+        "namespace": "http://www.w3.org/1999/xhtml",
+        "startTag": {
+            "type": "VStartTag",
+            "range": [
+                0,
+                10
+            ],
+            "loc": {
+                "start": {
+                    "line": 1,
+                    "column": 0
+                },
+                "end": {
+                    "line": 1,
+                    "column": 10
+                }
+            },
+            "selfClosing": false,
+            "attributes": []
+        },
+        "children": [
+            {
+                "type": "VText",
+                "range": [
+                    10,
+                    15
+                ],
+                "loc": {
+                    "start": {
+                        "line": 1,
+                        "column": 10
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 4
+                    }
+                },
+                "value": "\n    "
+            },
+            {
+                "type": "VElement",
+                "range": [
+                    15,
+                    74
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 4
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 63
+                    }
+                },
+                "name": "button",
+                "rawName": "button",
+                "namespace": "http://www.w3.org/1999/xhtml",
+                "startTag": {
+                    "type": "VStartTag",
+                    "range": [
+                        15,
+                        65
+                    ],
+                    "loc": {
+                        "start": {
+                            "line": 2,
+                            "column": 4
+                        },
+                        "end": {
+                            "line": 2,
+                            "column": 54
+                        }
+                    },
+                    "selfClosing": false,
+                    "attributes": [
+                        {
+                            "type": "VAttribute",
+                            "range": [
+                                23,
+                                64
+                            ],
+                            "loc": {
+                                "start": {
+                                    "line": 2,
+                                    "column": 12
+                                },
+                                "end": {
+                                    "line": 2,
+                                    "column": 53
+                                }
+                            },
+                            "directive": true,
+                            "key": {
+                                "type": "VDirectiveKey",
+                                "range": [
+                                    23,
+                                    29
+                                ],
+                                "loc": {
+                                    "start": {
+                                        "line": 2,
+                                        "column": 12
+                                    },
+                                    "end": {
+                                        "line": 2,
+                                        "column": 18
+                                    }
+                                },
+                                "name": {
+                                    "type": "VIdentifier",
+                                    "range": [
+                                        23,
+                                        24
+                                    ],
+                                    "loc": {
+                                        "start": {
+                                            "column": 12,
+                                            "line": 2
+                                        },
+                                        "end": {
+                                            "column": 13,
+                                            "line": 2
+                                        }
+                                    },
+                                    "name": "on",
+                                    "rawName": "@"
+                                },
+                                "argument": {
+                                    "type": "VIdentifier",
+                                    "range": [
+                                        24,
+                                        29
+                                    ],
+                                    "loc": {
+                                        "start": {
+                                            "column": 13,
+                                            "line": 2
+                                        },
+                                        "end": {
+                                            "column": 18,
+                                            "line": 2
+                                        }
+                                    },
+                                    "name": "click",
+                                    "rawName": "click"
+                                },
+                                "modifiers": []
+                            },
+                            "value": {
+                                "type": "VExpressionContainer",
+                                "range": [
+                                    30,
+                                    64
+                                ],
+                                "loc": {
+                                    "start": {
+                                        "line": 2,
+                                        "column": 19
+                                    },
+                                    "end": {
+                                        "line": 2,
+                                        "column": 53
+                                    }
+                                },
+                                "expression": {
+                                    "type": "FunctionExpression",
+                                    "start": 31,
+                                    "end": 63,
+                                    "loc": {
+                                        "start": {
+                                            "line": 2,
+                                            "column": 20
+                                        },
+                                        "end": {
+                                            "line": 2,
+                                            "column": 52
+                                        }
+                                    },
+                                    "range": [
+                                        31,
+                                        63
+                                    ],
+                                    "id": null,
+                                    "expression": false,
+                                    "generator": false,
+                                    "async": true,
+                                    "params": [],
+                                    "body": {
+                                        "type": "BlockStatement",
+                                        "start": 48,
+                                        "end": 63,
+                                        "loc": {
+                                            "start": {
+                                                "line": 2,
+                                                "column": 37
+                                            },
+                                            "end": {
+                                                "line": 2,
+                                                "column": 52
+                                            }
+                                        },
+                                        "range": [
+                                            48,
+                                            63
+                                        ],
+                                        "body": [
+                                            {
+                                                "type": "ExpressionStatement",
+                                                "start": 50,
+                                                "end": 61,
+                                                "loc": {
+                                                    "start": {
+                                                        "line": 2,
+                                                        "column": 39
+                                                    },
+                                                    "end": {
+                                                        "line": 2,
+                                                        "column": 50
+                                                    }
+                                                },
+                                                "range": [
+                                                    50,
+                                                    61
+                                                ],
+                                                "expression": {
+                                                    "type": "AwaitExpression",
+                                                    "start": 50,
+                                                    "end": 61,
+                                                    "loc": {
+                                                        "start": {
+                                                            "line": 2,
+                                                            "column": 39
+                                                        },
+                                                        "end": {
+                                                            "line": 2,
+                                                            "column": 50
+                                                        }
+                                                    },
+                                                    "range": [
+                                                        50,
+                                                        61
+                                                    ],
+                                                    "argument": {
+                                                        "type": "CallExpression",
+                                                        "start": 56,
+                                                        "end": 61,
+                                                        "loc": {
+                                                            "start": {
+                                                                "line": 2,
+                                                                "column": 45
+                                                            },
+                                                            "end": {
+                                                                "line": 2,
+                                                                "column": 50
+                                                            }
+                                                        },
+                                                        "range": [
+                                                            56,
+                                                            61
+                                                        ],
+                                                        "callee": {
+                                                            "type": "Identifier",
+                                                            "start": 56,
+                                                            "end": 59,
+                                                            "loc": {
+                                                                "start": {
+                                                                    "line": 2,
+                                                                    "column": 45
+                                                                },
+                                                                "end": {
+                                                                    "line": 2,
+                                                                    "column": 48
+                                                                }
+                                                            },
+                                                            "range": [
+                                                                56,
+                                                                59
+                                                            ],
+                                                            "name": "act"
+                                                        },
+                                                        "arguments": [],
+                                                        "optional": false
+                                                    }
+                                                }
+                                            }
+                                        ]
+                                    }
+                                },
+                                "references": [
+                                    {
+                                        "id": {
+                                            "type": "Identifier",
+                                            "start": 56,
+                                            "end": 59,
+                                            "loc": {
+                                                "start": {
+                                                    "line": 2,
+                                                    "column": 45
+                                                },
+                                                "end": {
+                                                    "line": 2,
+                                                    "column": 48
+                                                }
+                                            },
+                                            "range": [
+                                                56,
+                                                59
+                                            ],
+                                            "name": "act"
+                                        },
+                                        "mode": "r"
+                                    }
+                                ]
+                            }
+                        }
+                    ]
+                },
+                "children": [],
+                "endTag": {
+                    "type": "VEndTag",
+                    "range": [
+                        65,
+                        74
+                    ],
+                    "loc": {
+                        "start": {
+                            "line": 2,
+                            "column": 54
+                        },
+                        "end": {
+                            "line": 2,
+                            "column": 63
+                        }
+                    }
+                },
+                "variables": []
+            },
+            {
+                "type": "VText",
+                "range": [
+                    74,
+                    75
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 63
+                    },
+                    "end": {
+                        "line": 3,
+                        "column": 0
+                    }
+                },
+                "value": "\n"
+            }
+        ],
+        "endTag": {
+            "type": "VEndTag",
+            "range": [
+                75,
+                86
+            ],
+            "loc": {
+                "start": {
+                    "line": 3,
+                    "column": 0
+                },
+                "end": {
+                    "line": 3,
+                    "column": 11
+                }
+            }
+        },
+        "variables": [],
+        "tokens": [
+            {
+                "type": "HTMLTagOpen",
+                "range": [
+                    0,
+                    9
+                ],
+                "loc": {
+                    "start": {
+                        "line": 1,
+                        "column": 0
+                    },
+                    "end": {
+                        "line": 1,
+                        "column": 9
+                    }
+                },
+                "value": "template"
+            },
+            {
+                "type": "HTMLTagClose",
+                "range": [
+                    9,
+                    10
+                ],
+                "loc": {
+                    "start": {
+                        "line": 1,
+                        "column": 9
+                    },
+                    "end": {
+                        "line": 1,
+                        "column": 10
+                    }
+                },
+                "value": ""
+            },
+            {
+                "type": "HTMLWhitespace",
+                "range": [
+                    10,
+                    15
+                ],
+                "loc": {
+                    "start": {
+                        "line": 1,
+                        "column": 10
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 4
+                    }
+                },
+                "value": "\n    "
+            },
+            {
+                "type": "HTMLTagOpen",
+                "range": [
+                    15,
+                    22
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 4
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 11
+                    }
+                },
+                "value": "button"
+            },
+            {
+                "type": "Punctuator",
+                "range": [
+                    23,
+                    24
+                ],
+                "loc": {
+                    "start": {
+                        "column": 12,
+                        "line": 2
+                    },
+                    "end": {
+                        "column": 13,
+                        "line": 2
+                    }
+                },
+                "value": "@"
+            },
+            {
+                "type": "HTMLIdentifier",
+                "range": [
+                    24,
+                    29
+                ],
+                "loc": {
+                    "start": {
+                        "column": 13,
+                        "line": 2
+                    },
+                    "end": {
+                        "column": 18,
+                        "line": 2
+                    }
+                },
+                "value": "click"
+            },
+            {
+                "type": "HTMLAssociation",
+                "range": [
+                    29,
+                    30
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 18
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 19
+                    }
+                },
+                "value": ""
+            },
+            {
+                "type": "Punctuator",
+                "range": [
+                    30,
+                    31
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 19
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 20
+                    }
+                },
+                "value": "\""
+            },
+            {
+                "type": "Identifier",
+                "value": "async",
+                "start": 31,
+                "end": 36,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 20
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 25
+                    }
+                },
+                "range": [
+                    31,
+                    36
+                ]
+            },
+            {
+                "type": "Keyword",
+                "value": "function",
+                "start": 37,
+                "end": 45,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 26
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 34
+                    }
+                },
+                "range": [
+                    37,
+                    45
+                ]
+            },
+            {
+                "type": "Punctuator",
+                "value": "(",
+                "start": 45,
+                "end": 46,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 34
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 35
+                    }
+                },
+                "range": [
+                    45,
+                    46
+                ]
+            },
+            {
+                "type": "Punctuator",
+                "value": ")",
+                "start": 46,
+                "end": 47,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 35
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 36
+                    }
+                },
+                "range": [
+                    46,
+                    47
+                ]
+            },
+            {
+                "type": "Punctuator",
+                "value": "{",
+                "start": 48,
+                "end": 49,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 37
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 38
+                    }
+                },
+                "range": [
+                    48,
+                    49
+                ]
+            },
+            {
+                "type": "Identifier",
+                "value": "await",
+                "start": 50,
+                "end": 55,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 39
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 44
+                    }
+                },
+                "range": [
+                    50,
+                    55
+                ]
+            },
+            {
+                "type": "Identifier",
+                "value": "act",
+                "start": 56,
+                "end": 59,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 45
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 48
+                    }
+                },
+                "range": [
+                    56,
+                    59
+                ]
+            },
+            {
+                "type": "Punctuator",
+                "value": "(",
+                "start": 59,
+                "end": 60,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 48
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 49
+                    }
+                },
+                "range": [
+                    59,
+                    60
+                ]
+            },
+            {
+                "type": "Punctuator",
+                "value": ")",
+                "start": 60,
+                "end": 61,
+                "loc": {
+                    "start": {
+                        "line": 2,
+                        "column": 49
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 50
+                    }
+                },
+                "range": [
+                    60,
+                    61
+                ]
+            },
+            {
+                "type": "Punctuator",
+                "value": "}",
+                "start": 62,
+                "end": 63,
+                "loc": {
+                    "start": {
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+                    },
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+                        "line": 2,
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+                    }
+                },
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+                    62,
+                    63
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+            },
+            {
+                "type": "Punctuator",
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+                    63,
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+                "loc": {
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+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 53
+                    }
+                },
+                "value": "\""
+            },
+            {
+                "type": "HTMLTagClose",
+                "range": [
+                    64,
+                    65
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
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+                    "end": {
+                        "line": 2,
+                        "column": 54
+                    }
+                },
+                "value": ""
+            },
+            {
+                "type": "HTMLEndTagOpen",
+                "range": [
+                    65,
+                    73
+                ],
+                "loc": {
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+                        "column": 54
+                    },
+                    "end": {
+                        "line": 2,
+                        "column": 62
+                    }
+                },
+                "value": "button"
+            },
+            {
+                "type": "HTMLTagClose",
+                "range": [
+                    73,
+                    74
+                ],
+                "loc": {
+                    "start": {
+                        "line": 2,
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+                    "end": {
+                        "line": 2,
+                        "column": 63
+                    }
+                },
+                "value": ""
+            },
+            {
+                "type": "HTMLWhitespace",
+                "range": [
+                    74,
+                    75
+                ],
+                "loc": {
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+                    "end": {
+                        "line": 3,
+                        "column": 0
+                    }
+                },
+                "value": "\n"
+            },
+            {
+                "type": "HTMLEndTagOpen",
+                "range": [
+                    75,
+                    85
+                ],
+                "loc": {
+                    "start": {
+                        "line": 3,
+                        "column": 0
+                    },
+                    "end": {
+                        "line": 3,
+                        "column": 10
+                    }
+                },
+                "value": "template"
+            },
+            {
+                "type": "HTMLTagClose",
+                "range": [
+                    85,
+                    86
+                ],
+                "loc": {
+                    "start": {
+                        "line": 3,
+                        "column": 10
+                    },
+                    "end": {
+                        "line": 3,
+                        "column": 11
+                    }
+                },
+                "value": ""
+            },
+            {
+                "type": "HTMLWhitespace",
+                "range": [
+                    86,
+                    87
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+                "loc": {
+                    "start": {
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+                    "end": {
+                        "line": 4,
+                        "column": 0
+                    }
+                },
+                "value": "\n"
+            }
+        ],
+        "comments": [],
+        "errors": []
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+}
\ No newline at end of file
diff --git a/test/fixtures/ast/v-on-async-function-expression/source.vue b/test/fixtures/ast/v-on-async-function-expression/source.vue
new file mode 100644
index 00000000..fb86873b
--- /dev/null
+++ b/test/fixtures/ast/v-on-async-function-expression/source.vue
@@ -0,0 +1,3 @@
+<template>
+    <button @click="async function() { await act() }"></button>
+</template>
diff --git a/test/fixtures/ast/v-on-async-function-expression/token-ranges.json b/test/fixtures/ast/v-on-async-function-expression/token-ranges.json
new file mode 100644
index 00000000..77fdd025
--- /dev/null
+++ b/test/fixtures/ast/v-on-async-function-expression/token-ranges.json
@@ -0,0 +1,28 @@
+[
+    "<template",
+    ">",
+    "\n    ",
+    "<button",
+    "@",
+    "click",
+    "=",
+    "\"",
+    "async",
+    "function",
+    "(",
+    ")",
+    "{",
+    "await",
+    "act",
+    "(",
+    ")",
+    "}",
+    "\"",
+    ">",
+    "</button",
+    ">",
+    "\n",
+    "</template",
+    ">",
+    "\n"
+]
\ No newline at end of file
diff --git a/test/fixtures/ast/v-on-async-function-expression/tree.json b/test/fixtures/ast/v-on-async-function-expression/tree.json
new file mode 100644
index 00000000..5fdf6e87
--- /dev/null
+++ b/test/fixtures/ast/v-on-async-function-expression/tree.json
@@ -0,0 +1,108 @@
+[
+    {
+        "type": "VElement",
+        "text": "<template>\n    <button @click=\"async function() { await act() }\"></button>\n</template>",
+        "children": [
+            {
+                "type": "VStartTag",
+                "text": "<template>",
+                "children": []
+            },
+            {
+                "type": "VText",
+                "text": "\n    ",
+                "children": []
+            },
+            {
+                "type": "VElement",
+                "text": "<button @click=\"async function() { await act() }\"></button>",
+                "children": [
+                    {
+                        "type": "VStartTag",
+                        "text": "<button @click=\"async function() { await act() }\">",
+                        "children": [
+                            {
+                                "type": "VAttribute",
+                                "text": "@click=\"async function() { await act() }\"",
+                                "children": [
+                                    {
+                                        "type": "VDirectiveKey",
+                                        "text": "@click",
+                                        "children": [
+                                            {
+                                                "type": "VIdentifier",
+                                                "text": "@",
+                                                "children": []
+                                            },
+                                            {
+                                                "type": "VIdentifier",
+                                                "text": "click",
+                                                "children": []
+                                            }
+                                        ]
+                                    },
+                                    {
+                                        "type": "VExpressionContainer",
+                                        "text": "\"async function() { await act() }\"",
+                                        "children": [
+                                            {
+                                                "type": "FunctionExpression",
+                                                "text": "async function() { await act() }",
+                                                "children": [
+                                                    {
+                                                        "type": "BlockStatement",
+                                                        "text": "{ await act() }",
+                                                        "children": [
+                                                            {
+                                                                "type": "ExpressionStatement",
+                                                                "text": "await act()",
+                                                                "children": [
+                                                                    {
+                                                                        "type": "AwaitExpression",
+                                                                        "text": "await act()",
+                                                                        "children": [
+                                                                            {
+                                                                                "type": "CallExpression",
+                                                                                "text": "act()",
+                                                                                "children": [
+                                                                                    {
+                                                                                        "type": "Identifier",
+                                                                                        "text": "act",
+                                                                                        "children": []
+                                                                                    }
+                                                                                ]
+                                                                            }
+                                                                        ]
+                                                                    }
+                                                                ]
+                                                            }
+                                                        ]
+                                                    }
+                                                ]
+                                            }
+                                        ]
+                                    }
+                                ]
+                            }
+                        ]
+                    },
+                    {
+                        "type": "VEndTag",
+                        "text": "</button>",
+                        "children": []
+                    }
+                ]
+            },
+            {
+                "type": "VText",
+                "text": "\n",
+                "children": []
+            },
+            {
+                "type": "VEndTag",
+                "text": "</template>",
+                "children": []
+            }
+        ]
+    }
+]
\ No newline at end of file