feat: add mjs build (es6 modules)

Author: nodkz

Diff for: .babelrc

@@ -2,13 +2,42 @@
   "plugins": [
     "transform-object-rest-spread",
     "transform-flow-strip-types",
-    ["transform-runtime", { "polyfill": false }]
-  ],
-  "presets": [
-    ["env", {
-      "targets": {
-        "node": 4
-      },
-    }]
   ],
+  "env": {
+    "cjs": {
+      "plugins": [
+        ["transform-runtime", { "polyfill": false }]
+      ],
+      "presets": [
+        ["env", {
+          "targets": {
+            "node": 4
+          },
+        }]
+      ],
+    },
+    "mjs": {
+      "presets": [
+        [
+          "env",
+          {
+            "targets": {
+              "node": "8.0.0"
+            },
+            "loose": true,
+            "modules": false
+          }
+        ]
+      ]
+    },
+    "test": {
+      "presets": [
+        ["env", {
+          "targets": {
+            "node": "current"
+          },
+        }]
+      ]
+    }
+  }
 }

Diff for: .eslintignore

@@ -1,2 +1,3 @@
 lib/*
 es/*
+mjs/*

Diff for: .flowconfig

@@ -2,7 +2,7 @@
 .*/coverage/.*
 .*/resources/.*
 <PROJECT_ROOT>/lib/.*
-<PROJECT_ROOT>/dist/.*
+<PROJECT_ROOT>/mjs/.*
 .*/node_modules/ajv.*
 .*/node_modules/acorn.*
 .*/node_modules/async.*

Diff for: .gitignore

@@ -41,6 +41,7 @@ node_modules
 # Transpiled code
 /es
 /lib
+/mjs
 
 coverage
 .nyc_output

Diff for: package.json

@@ -4,9 +4,11 @@
   "description": "Plugin for `graphql-compose` which provide a pagination resolver for types.",
   "files": [
     "lib",
+    "mjs",
     "README.md"
   ],
   "main": "lib/index.js",
+  "module": "mjs/index.js",
   "repository": {
     "type": "git",
     "url": "https://github.com/graphql-compose/graphql-compose-pagination.git"
@@ -63,9 +65,11 @@
     ]
   },
   "scripts": {
-    "build": "npm run build-cjs && npm run build-flow",
-    "build-cjs": "rimraf lib && babel src --ignore __tests__,__mocks__ -d lib",
-    "build-flow": "find ./src -name '*.js' -not -path '*/__*' | while read filepath; do cp $filepath `echo $filepath | sed 's/\\/src\\//\\/lib\\//g'`.flow; done",
+    "build": "npm run build-cjs && npm run build-mjs && npm run build-flow",
+    "build-cjs": "rimraf lib && babel src --ignore __tests__,__mocks__ -d lib && COPY_TO_FOLDER=lib npm run build-flow",
+    "build-mjs": "rimraf mjs && BABEL_ENV=mjs babel src --ignore __tests__,__mocks__ -d mjs && yarn build-mjs-rename && COPY_TO_FOLDER=mjs npm run build-flow",
+    "build-mjs-rename": "find ./mjs -name \"*.js\" -exec bash -c 'mv \"$1\" \"${1%.js}\".mjs' - '{}' \\;",
+    "build-flow": "find ./src -name '*.js' -not -path '*/__*' | while read filepath; do cp $filepath `echo ./${COPY_TO_FOLDER:-lib}$filepath | sed 's/.\\/src\\//\\//g'`.flow; done",
     "watch": "jest --watch",
     "coverage": "jest --coverage",
     "lint": "eslint --ext .js ./src",