Vue Lazy Component

🐌 Vue.js 2.x 组件级懒加载方案-Vue.js 2.x component level lazy loading solution
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Readme

Vue Lazy Component

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🐌 Vue.js 2.x 组件级懒加载方案

English version documentation

特性

  • 支持 组件可见或即将可见时懒加载
  • 支持 组件延时加载
  • 支持 加载真实组件前展示骨架组件,提高用户体验
  • 支持 真实组件代码分包异步加载

安装 / Installation

npm install @xunlei/vue-lazy-component

在线demo / Online demo

https://xunleif2e.github.io/vue-lazy-component/demo/dist/index.html

使用

1. 注册组件

方式1 利用插件方式全局注册

import VueLazyComponent from '@xunlei/vue-lazy-component'
import Vue from 'vue'

Vue.use(VueLazyComponent)

方式2 局部注册

import { component as VueLazyComponent } from '@xunlei/vue-lazy-component'

export default {
  // ...
  components: {
    'vue-lazy-component': VueLazyComponent
  }
}

方式3 独立版本引入,自动全局注册

前提是 vue 也是独立版本通过script标签引入

<script src="https://unpkg.com/@xunlei/[email protected]/dist/vue-lazy-component.js"></script>

2. 模版语法

 <vue-lazy-component
  @init="init"
  @beforeInit="beforeInit"
 >
  <!-- real component-->
  <st-series-sohu/>
  <!-- skeleton component -->
  <st-series-sohu-skeleton slot="skeleton"/>
</vue-lazy-component>

Props

参数 说明 类型 可选值 默认值
viewport 组件所在的视口,如果组件是在页面容器内滚动,视口就是该容器 HTMLElement true null,代表视窗
direction 视口的滚动方向, vertical代表垂直方向,horizontal代表水平方向 String true vertical
threshold 预加载阈值, css单位 String true 0px
tagName 包裹组件的外层容器的标签名 String true div
timeout 等待时间,如果指定了时间,不论可见与否,在指定时间之后自动加载 Number true -

Events

事件名 说明 事件参数
before-init 模块可见或延时截止导致准备开始加载懒加载模块 -
init 开始加载懒加载模块,此时骨架组件开始消失 -
before-enter 懒加载模块开始进入 el
before-leave 骨架组件开始离开 el
after-leave 骨架组件已经离开 el
after-enter 懒加载模快已经进入 el
after-init 初始化完成 -

注意 / Notes

  1. 该项目依赖 IntersectionObserver API,如需在较低版本浏览器运行,需要引入 IntersectionObserver API polyfill

IntersectionObserver API polyfill

https://github.com/w3c/IntersectionObserver/tree/master/polyfill

  1. webpack 分包异步加载方式依赖 Scoped Component Slots, 需要 Vue 版本大于2.1.0

Development Setup

# install deps
npm install

# serve demo at localhost:8080
npm run dev

# build library and demo
npm run build

# build library
npm run build:library

# build demo
npm run build:demo

# commit use commitizen
npm run commit

# pre publish
npm run prepublish

# generate changelog
npm run changelog

Roadmap

  • [x] SSR 支持 @ v1.1.0

  • [ ] UI单元测试 @ v1.2.0

  • [ ] 减少性能开销 @ v1.3.0

License

MIT

Copyright (c) 2017 XunleiF2E

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