Merge pull request #23 from ambit-tsai/dev

fix: "this.$data" is undefined in Vue 3

Author: ambit-tsai

package.json

@@ -1,6 +1,6 @@
 {
   "name": "echarts-for-vue",
-  "version": "1.4.0",
+  "version": "1.4.1",
   "description": "ECharts wrapper component for Vue 3, 2 and TypeScript",
   "main": "dist/echarts-for-vue.js",
   "module": "dist/echarts-for-vue.mjs",

src/common-options.ts

@@ -31,9 +31,7 @@ export default {
     mounted(this: EChartsComponent) {
         // Readonly property "inst"
         Object.defineProperty(this, 'inst', {
-            get(this: EChartsComponent) {
-                return this.$data._private.inst
-            },
+            get: () => this.$data._private.inst,
         })
         this.init()
     },