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.

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)  }})

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    } }}