Fix the problem that the text position of [Content is empty] is incorrect when the data is empty

Author: wuchao

Diff for: .gitignore

@@ -9,4 +9,4 @@ yarn-error.log
 *.suo
 *.ntvs*
 *.njsproj
-*.sln
+*.sln

Diff for: package.json

@@ -1,12 +1,19 @@
 {
     "name": "@wchbrad/vue-easy-tree",
     "description": "A Vue.js project",
-    "version": "1.0.4",
+    "version": "1.0.5",
     "author": "wchbrad <[email protected]>",
     "license": "MIT",
     "private": false,
     "main": "./dist/vue-easy-tree.js",
-    "keywords": ["virtual", "tree", "bigdata", "largedata", "lazy loading", "vue"],
+    "keywords": [
+        "virtual",
+        "tree",
+        "bigdata",
+        "largedata",
+        "lazy loading",
+        "vue"
+    ],
     "repository": {
         "type": "git",
         "url": "git+https://github.com/wchbrad/vue-easy-tree.git"
@@ -54,4 +61,4 @@
         "webpack-cli": "^3.0.8",
         "webpack-dev-server": "^3.1.11"
     }
-}
+}

Diff for: src/components/ve-tree.vue

@@ -10,7 +10,7 @@
     role="tree"
   >
     <RecycleScroller
-      v-if="height"
+      v-if="height && !isEmpty"
       :style="{
         height: height,
         'overflow-y': 'auto',
@@ -33,7 +33,7 @@
     </RecycleScroller>
     <el-tree-node
       v-for="child in root.childNodes"
-      v-else
+      v-else-if="!isEmpty"
       :key="getNodeKey(child)"
       :node="child"
       :props="props"