Vue.js run a code in mounted and again for restart functionality

Abstract your initialization into a method, and call the method from mounted and wherever else you want.

new Vue({  methods:{    init(){      //call API      //Setup game    }  },  mounted(){    this.init()  }})

Then possibly have a button in your template to start over.

<button v-if="playerWon" @click="init">Play Again</button>

In this button, playerWon represents a boolean value in your data that you would set when the player wins the game so the button appears. You would set it back to false in init.

With Vue 3 and composition API you could use onMounted hook to call a function that could be called later :

import {ref, onMounted, watch} from 'vue'export default {  setup() {    const win=ref(false)    watch(win,(newVal) => {      if(newVal) {        init()      }    })    onMounted(()=>{      init()    })    function init(){      //init    }  }}

You can also move mounted out of the Vue instance and make it a function in the top-level scope. This is also a useful trick for server side rendering in Vue.

function init() {  // Use `this` normally}new Vue({  methods:{    init  },  mounted(){    init.call(this)  }})