Vue js Array fill function

<html>
  <head>
    <script type="importmap">
  {
    "imports": {
      "vue": "https://unpkg.com/vue@3/dist/vue.esm-browser.js"
    }
  }
</script>
   <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-F3w7mX95PdgyTmZZMECAngseQB83DfGTowi0iMjiWaeVhAn4FJkqJByhZMI3AhiU" crossorigin="anonymous">
</head>
    <body>
      <div id="app" class="container">
        <h2>Vue js fill() function</h2>
        <p>Array fill() All index in Vue JS |  Example</p>
        <p>Language : {{language}}</p>
        <button class="btn btn-primary" @click="myFunction">fill method</button>
       </div>
  <script type="module">
     import { createApp } from 'vue'
     createApp({
     data() {
      return {
          language :['HTML','CSS','Javascript','PHP','Vue','React'],
        
        }
    },
    methods:{
             myFunction(){
                this.language.fill('Express');
              }
            }
   }).mount('#app')
</script>
 </body>
</html>