How to declare a global variable in Vue.js
In this post we will give you information about How to declare a global variable in Vue.js. Hear we will give you detail about How to declare a global variable in Vue.jsAnd how to use it also give you demo for it if it is necessary.
we are going to learn about how to declare a global variable in vuejs with the help of an example.
Sometimes we need to access a particular data throughout our app components in such cases we can create a global variable in vue.js by using this syntax.
Vue.prototype.$variablename
where $ is a naming convention to declare the global variables.
Declaring a global variable
In this example, we are declaring a $axios global variable which helps us to use the axios object in our components to send the http requests.
Open you main.js file and add the below code.
import Vue from 'vue'import App from './App.vue'import axios from 'axios'// global variableVue.prototype.$axios = axiosnew Vue({ render: h => h(App),}).$mount('#app')Accessing global variable
We can access the global variable from any component instance by using this.$variablename.
<template> <div id="app"> <ul v-for="user in users" :key="user.id"> <li>{{user.id}}</li> <li>{{user.name}}</li> </ul> </div></template><script>export default { data: function() { return { users: [] }; }, created: function() { this.$axios.get("https://jsonplaceholder.typicode.com/users") .then(res => { this.users = res.data; }); }};</script>output:
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