Front end training Vue Foundation

ninety 2021-06-19 10:22:21
end training vue foundation


 Front end training _3_-Vue Basics .png

brief introduction

characteristic :MVVM frame , Two way binding , Data driven , Single page , Componentization .

difference

Vue and jQuery The difference between : Do not operate directly DOM, It is Operational data .

Case study :Hello World => Hello , The world

HTML Code :

<h1>{{msg}}</h1>

jQuery Realization

$("h1").text(" Hello , The world ");

Vue Realization

this.msg = ' Hello , The world '

Create project

1、CDN

<!-- Development environment version , Contains helpful command-line warnings --><script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>

Suitable for the existing non Vue In the project , add to Vue, For page interaction , Just know , With a few .

2、Vue-Cli( recommend )

Development of front end and back end separation projects ,

install Node.js(Node.js It's based on Chrome V8 Engine JavaScript Runtime .)

Use NPM(Node Packages Modules,Node Package management tools ) download

download Vue-Cli( be based on Vue.js A complete system for rapid development )

Use command line tools cmd 、Git bash、VScode All the terminals can

# Global installation vue-clinpm install -g @vue/cli# Create a new project vue create project-name# start-up cd project-nameyarn server# or# Visual management interface vue ui

The whole project uses Vue Development

Project structure

All the project files that need to be developed are in src Below directory vue Project file directory parsing .png Add :node_modules: Project dependency package ( adopt npm install install )

Common commands

  1. Installation dependency :npm install/yarn/cnpm install
  2. Start the service :npm run dev/npm run serve
  3. Project package :npm run build

2-3 Reference resources package.json Of documents script object

Switch source

solve npm Servers are slow in China 、 The problem of packet loss .

Download Development Tools :VScode download

Installing a plug-in :Extensions for VScode

  • Vetur
  • ESLint

    Debugging tools

Vue-Devtool Plug in installation

Reference resources :Vue.js Chinese official website

v-for / v-key

v-if / v-show

v-bind / :

v-model

v-on:click / @click

Life cycle

Reference resources :Vue Life cycle , Sketch Map : picture

  • beforeCreate( Before creation )
  • created( After creating )
  • beforeMount( Before mounting )
  • mounted( After mounting )
  • beforeUpdate( Before updating )
  • updated( After the update )
  • beforeDestory( Before destruction )
  • destroyed( After destruction )

    Components

Component development is Vue One of the characteristics of , Component development greatly improves the reusability of code , It's also convenient for the team to work together .

Package components

# /src/components/Button.vue<template> <div> <button>{{ text }}</button> </div></template><script>export default { props: { text: String, },};</script>

Use components

# /src/view/about.vue<template> <div class="about"> <h1>This is an about page</h1> <Button :text="ButtonText"></Button> </div></template><script>import Button from "@/components/Button.vue";export default { components: { Button, }, data: function() { return { ButtonText: " I'm a button ", }; },};</script>

Component parameters

Use props

Third party component library

PC End :iView、Element、Ant Design

Mobile :Vant、cube-ui

iView

Official website address :iView

Download components

npm install view-design --save

Use components globally

// main.jsimport ViewUI from 'view-design';import 'view-design/dist/styles/iview.css';Vue.use(ViewUI);

ivew-admin

iView-admin yes iView One of the members of the ecology , It is a set of development mode with front end and back end separated , be based on Vue The front-end solution of the background management system .iView-admin2.0 Out of the 1.x Version refactoring , Switch to a Webpack4.0 + Vue-cli3.0 As a basic development environment . Built in development background management system commonly used logic function , And out of the box business components , It aims to enable developers to develop background management system with minimum cost , Reduce development .

Address :iview-admin

Other plug-ins

Vue-router

Routing plug-in

Two modes

  • hash / #
  • history / Historical record

    Axios

HTTP Request Library

install

npm install axios --save

vue.config.js Configure agent

const URL = 'https://cnodejs.org'; // Requested address module.exports = { outputDir: 'dist', publicPath: process.env.NODE_ENV === 'production' ? './' : '/', devServer: { disableHostCheck: true, port: 8080, open: true, proxy: { '/api': { // /api =》'https://cnodejs.org' target: URL } } }};

Vuex

State management

Pack and go online

After the development of the project , Use npm run build Command to package the project , When the packaging is complete, it will generate dist Folder

When the project goes online , Direct will dist Put the folder on the server

practice

  1. v-if and v-show The difference between ?
  2. Dynamic binding class Usage of ?
  3. Try to package / Use a component ?

From nineties Original article

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本文为[ninety ]所创,转载请带上原文链接,感谢
https://qdmana.com/2021/06/20210607165816425X.html

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