Vue development practice: building highly available front-end applications
With the rapid development of Internet technology, front-end development has attracted more and more attention. As one of the most popular front-end frameworks at present, Vue has the advantages of being easy to learn, efficient, flexible, and component-based, and is widely used in actual projects. This article will introduce how to use Vue to build a highly available front-end application.
1. Prerequisite knowledge
Before using Vue for development, you need to master the following technologies:
- HTML/CSS/JavaScript
HTML is a web page markup language, CSS is a style sheet language, and JavaScript is a scripting language. HTML is responsible for the page structure, CSS is responsible for the page style, and JavaScript is responsible for the page logic.
- ES6
ES6 is the next generation standard for JavaScript, adding new syntax and features, including arrow functions, classes, Promise, let and const, etc.
- Node.js
Node.js is a runtime environment for server-side programming using JavaScript. You can use the npm package manager to install and manage dependency packages.
- Webpack
Webpack is the most popular front-end packaging tool. It can package multiple JavaScript files into one file and optimize it, and you can use plug-ins to extend functions.
- Vue.js
Vue is a progressive JavaScript framework that makes it easy to build interactive web interfaces. It provides functions such as data binding and componentization, and is easy to use and flexible.
2. Build Vue application
- Install Vue
Use npm package manager, you can use the following command to install Vue:
npm install vue
- Create Vue instance
After introducing the Vue.js file into the HTML file, you can create a Vue instance. The Vue instance is responsible for maintaining the page state and bidirectionally binding it to the page. The following is a sample code for creating a Vue instance:
<!DOCTYPE html>
<html>
<head>
<title>Vue Demo</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
{{ message }}
</div>
<script>
var app = new Vue({
el: '#app',
data: {
message: 'Hello, Vue!'
}
})
</script>
</body>
</html>In the above sample code, Vue is used to construct a Vue instance containing the variable message, and the double curly bracket syntax is used to interpolate within the div tag.
- Using Vue components
Vue components contain templates, styles and JavaScript code, which can be reused in multiple Vue instances. The following is a sample code for defining a Vue component:
<!DOCTYPE html>
<html>
<head>
<title>Vue Demo</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
<my-component></my-component>
</div>
<script>
Vue.component('my-component', {
template: '<div>{{ message }}</div>',
data: function () {
return {
message: 'Hello, Vue Component!'
}
}
})
var app = new Vue({
el: '#app'
})
</script>
</body>
</html>In the above sample code, a component named my-component is defined and used in the template of the Vue instance.
- Route management
Vue Router is Vue’s official routing manager, which can realize routing control of single-page applications (SPA). The following is a sample code for using Vue Router for routing control:
<!DOCTYPE html>
<html>
<head>
<title>Vue Demo</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vue-router/dist/vue-router.js"></script>
</head>
<body>
<div id="app">
<router-view></router-view>
</div>
<script>
var Home = {
template: '<div>Home</div>'
}
var About = {
template: '<div>About</div>'
}
var router = new VueRouter({
routes: [
{
path: '/',
component: Home
},
{
path: '/about',
component: About
}
]
})
var app = new Vue({
router: router
}).$mount('#app')
</script>
</body>
</html>In the above sample code, two routing components Home and About are defined, and Vue Router is used for routing management. In the Vue instance, pass the Vue Router instance to the Vue instance using the router option.
- Data interaction
Data interaction generally refers to the data exchange between the front end and the back end. Vue provides a set of APIs for data interaction, including axios, fetch, etc. The following is a sample code for data interaction using axios:
<!DOCTYPE html>
<html>
<head>
<title>Vue Demo</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
</head>
<body>
<div id="app">
<ul>
<li v-for="item in items">{{ item }}</li>
</ul>
</div>
<script>
var app = new Vue({
el: '#app',
data: {
items: []
},
created: function () {
axios.get('/api/items')
.then(function (response) {
this.items = response.data
}.bind(this))
.catch(function (error) {
console.log(error)
})
}
})
</script>
</body>
</html>In the above sample code, a GET request is made using axios, the data returned by the backend is obtained, and the display data is bound to the Vue instance. template.
- State Management
State management can help us manage the state data of the application more effectively and make the data easier to maintain and expand. Vuex is the officially provided Vue state management library, providing a solution for centralized storage and management of the state and behavior of all components of an application. The following is a sample code for using Vuex for state management:
<!DOCTYPE html>
<html>
<head>
<title>Vue Demo</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vuex/dist/vuex.js"></script>
</head>
<body>
<div id="app">
<div>{{ count }}</div>
<button v-on:click="increment">+</button>
<button v-on:click="decrement">-</button>
</div>
<script>
var store = new Vuex.Store({
state: {
count: 0
},
mutations: {
increment: function (state) {
state.count++
},
decrement: function (state) {
state.count--
}
}
})
var app = new Vue({
el: '#app',
store: store,
computed: {
count: function () {
return this.$store.state.count
}
},
methods: {
increment: function () {
this.$store.commit('increment')
},
decrement: function () {
this.$store.commit('decrement')
}
}
})
</script>
</body>
</html>In the above sample code, Vuex is used for simple counter state management, and two mutations are defined to increase and decrease the value of the counter, and in The $store object is used in the Vue instance to bind state data and trigger mutations.
3. Summary
Through the introduction of this article, we have learned how to use Vue to build highly available front-end applications. In actual projects, more detailed development and optimization need to be carried out according to specific business needs. At the same time, collaboration with back-end developers is also crucial. Reasonable division of labor and collaborative cooperation can improve project development efficiency to a certain extent.
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