How to add accessibility features to Vue

With the continuous development of front-end frameworks, Vue, as one of the representatives, plays an important role in front-end development. Vue has the advantages of being easy to learn, flexible, and high-performance. However, the basic functions of Vue are limited. If you want to implement more complex functions, you need to add some auxiliary functions. This article will introduce how to add Vue's auxiliary functions to meet different development needs.

1. Introduction of Vue plug-in

Vue plug-in is a form of realizing Vue functions. Vue officially provides some commonly used plug-ins, such as Vue-Router, Vuex, Vue-CLI, etc. We can extend the functionality of Vue by introducing these plug-ins.

1.Vue-Router

Vue-Router is the routing management plug-in officially provided by Vue. Through Vue-Router, we can implement routing management of SPA single-page applications. If we want to implement a multi-page application, we can consider using dynamic loading and using Vue's lazy loading mechanism.

The steps to introduce the Vue-Router plug-in are as follows:

1) Use npm to install Vue-Router

npm install vue-router --save

2) Introduce the Vue-Router plug-in in the main.js file

import VueRouter from 'vue-router'

Vue.use(VueRouter)

3) Define routing in the router.js file

import Vue from 'vue'
import Router from 'vue-router'

Vue.use(Router)

export default new Router({
  routes: [
    {
      path: '/',
      name: 'Home',
      component: Home
    }
  ]
})

2.Vuex

Vuex is the state management mode officially provided by Vue. Through Vuex, we can centrally manage the status of the application in Vue and realize functions such as data sharing between components and message passing between components.

The steps to introduce the Vuex plug-in are as follows:

1) Use npm to install Vuex

npm install vuex --save

2) Introduce the Vuex plug-in in the main.js file

import Vuex from 'vuex'

Vue.use(Vuex)

3) Define Vuex store

import Vue from 'vue'
import Vuex from 'vuex'

Vue.use(Vuex)

export default new Vuex.Store({
  state: {
    count: 0
  },
  mutations: {
    increment(state) {
      state.count++
    }
  },
  actions: {
    incrementAsync({ commit }) {
      setTimeout(() => {
        commit('increment')
      }, 1000)
    }
  },
  getters: {
    getCount(state) {
      return state.count
    }
  }
})

3.Vue-CLI

in the store.js file. Vue-CLI is the command line tool officially provided by Vue, which can help us quickly build Vue projects. Through Vue-CLI, we can generate projects, configure webpack, add plug-ins, etc.

The steps to introduce the Vue-CLI plug-in are as follows:

1) Use npm to install Vue-CLI

npm install vue-cli -g

2) Run the following command in the command line to create a Vue project

vue init webpack my-project

3) Enter the created Vue project directory

cd my-project

4) Start the project

npm run dev

2. Use third-party libraries

In addition to the Vue plug-in, We can also use third-party libraries to extend Vue's functionality. Vue users can choose the third-party library that suits them according to their own needs.

1.axios

axios is a Promise-based HTTP library that can be used to send HTTP requests to the server in browsers and Node.js.

By introducing the axios library, we can easily send HTTP requests in Vue.

The steps to introduce the axios library are as follows:

1) Use npm to install axios

npm install axios --save

2) Introduce the axios library in the main.js file

import axios from 'axios'

Vue.prototype.$axios = axios;

3) Use axios

export default {
  data() {
    return {
      list: [],
    }
  },
  mounted() {
    this.getList()
  },
  methods: {
    getList() {
      this.$axios.get('url')
      .then(response => {
        this.list = response.data
      })
      .catch(error => {
        console.log(error)
      })
    }
  }
}

2.moment.js

moment.js is a JavaScript library that handles dates and times. It can easily format, parse and manipulate dates and times. time.

The steps to introduce the moment.js library are as follows:

1) Use npm to install moment.js

npm install moment --save

2) Use moment.js in the component

export default {
  data() {
    return {
      date: ''
    }
  },
  mounted() {
    this.date = moment().format('YYYY-MM-DD')
  }
}

3. Custom instructions

Vue’s instructions are a form of extending the behavior of HTML elements in Vue. Vue provides many built-in instructions, such as v-if, v-show, v-for, etc. If the built-in instructions in Vue cannot meet your needs, you can customize the instructions.

For example, we can customize a directive to solve the problem that the form can only be submitted when numbers are entered in the input box.

1) Define a custom instruction

Vue.directive('number', {
  bind: function(el) {
    el.addEventListener('input', function() {
      this.value = this.value.replace(/[^\d]/g, '')
    })
  }
})

2) Use the custom instruction in the component

<template>
  <div>
    <input type="text" v-number>
  </div>
</template>

4. Summary

By introducing the Vue plug-in, Using third-party libraries, custom instructions, etc., we can easily extend Vue's functions to meet different development needs. Of course, we can also choose to add auxiliary functions or develop them ourselves according to specific circumstances. Either way, keep your code clean and maintainable. Hopefully this article helps you better understand how to add functionality to Vue.

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