How to use Vue2x to implement image preview plug-in

This time I will show you how to use Vue2x to implement the image preview plug-in. What are the precautions for using Vue2x to implement the image preview plug-in? The following is a practical case, let's take a look.

Let’s take a look at Demo

LiveDemo

About several ways to develop Vue plug-ins (for details, please go to the official website) Vue official website

MyPlugin.install = function (Vue, options) {
 // 1. 添加全局方法或属性
 Vue.myGlobalMethod = function () {
  // 逻辑...
 }
 // 2. 添加全局资源
 Vue.directive('my-directive', {
  bind (el, binding, vnode, oldVnode) {
   // 逻辑...
  }
  ...
 })
 // 3. 注入组件
 Vue.mixin({
  created: function () {
   // 逻辑...
  }
  ...
 })
 // 4. 添加实例方法
 Vue.prototype.$myMethod = function (methodOptions) {
  // 逻辑...
 }
}

I use the first way to write this plug-in

1. The first step

Create the project

vue init webpack-simple youProjectName(you Project name) The specific operations will not be repeated

2. Start plug-in development and write index.js

import vuePictureViewer from './vue-picture-viewer'
const pictureviewer = {
 install (Vue, options) {
  Vue.component(vuePictureViewer.name, vuePictureViewer)
 }
}
if (typeof window !== 'undefined' && window.Vue) { // 这段代码很重要
 window.Vue.use(pictureviewer)
}
export default pictureviewer

3. Write vue-picture-viewer.vue It’s quite simple (you can check the source code for details)

4. How to use (main.js)

import vuePictureViewer from './lib/index.js'
Vue.use(vuePictureViewer)

App.vue

<template>
 <p id="app">
  <vue-picture-viewer :imgData="imgUrl" :switch="true" v-if="imgUrl"></vue-picture-viewer>
 </p>
</template>
<script>
export default {
 name: 'app',
 data () {
  return {
   imgUrl: [{
     url:'http://p8ny46w8x.bkt.clouddn.com/test1.jpg',
     name: 'test1.jpg'
    },
    {
     url: 'http://p8ny46w8x.bkt.clouddn.com/test2.jpg',
     name: 'test2.jpg'
    }, {
     url: 'http://p8ny46w8x.bkt.clouddn.com/test3.jpg',
     name: 'test3.jpg'
    },
    {
     url: 'http://p8ny46w8x.bkt.clouddn.com/test4.jpg',
     name: 'test4.jpg'
    }]
  }
 }
}
</script>
<style>
* {
 margin: 0;
 padding: 0;
}
html, body {
 width: 100%;
 height: 100%;
}
</style>

5. Configure webpack before packaging. config.js (very important!!!)

module.exports = {
 entry: './src/lib/index.js',
 output: {
  path: path.resolve(dirname, './dist'),
  publicPath: '/dist/',
  // filename: 'build.js',
  filename: 'vue-picture-viewer.js',
  library: 'pictureViewer',
  libraryTarget: 'umd',
  umdNamedDefine: true
 },

6. Packaging successful, configure package.json

"license": "MIT", // 许可证
 "private": false, // 默认是true 私人的 需要改为false, 不然发布不成功！
 "main": "dist/vue-picture-viewer.js", 这个超级重要 决定了你 import xxx from “vue-picture-viewer” 它默认就会去找 dist下的vue-picture-viewer 文件
 "repository": {
  "type": "git",
  "url": "https://github.com/sangcz/vue-picture-viewer" // github项目地址
 },

7. Everything is OK and ready to be released!

8. After registering npm first

Add user

npm adduser 
Username: your name 
Password: your password 
Email: yourmail
// 查看一下登录的是不是你自己
npm whoami
// 发布
npm publish
// 这里我遇到一个问题，发布失败了！

What is the reason?

#9. The above problem was solved and the release was successful! happy

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