Vue js array join function

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<html>
  <head>
    <script type="importmap">
      {
        "imports": {
          "vue": "https://unpkg.com/vue@3/dist/vue.esm-browser.js"
        }
      }
    </script>
   
    <body>
      <div id="app">
        <h2>Vue js Array join function</h2>
        <p>Vue JS Convert Array to Comma Separated String Example</p>
        <p>Array : {{demoArray}}</p>
        <button @click="myFunction">return array as string</button>
        
        <p></p>
        <p>String : {{result}}</p>
     </div>
      <script type="module">
      import { createApp } from 'vue'
      createApp({
      data()
      { 
        return{ 
         demoArray:['Australia','England','America','India','China','Russia'],
         result : ''
        } 
     }, 
     methods:{ 
         myFunction(){ 
            this.result = this.demoArray.join(); 
           },
          }
        }).mount('#app')
  </script>
​
    </body>
  </head>
</html>