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vue3-lazyload-pnm

v0.0.7

Published

适用于Vue3的图片懒加载

Downloads

1

Readme

Vue3-lazyload-pnm

适用于 Vue3.x 的图片懒加载插件

Install

$ npm i vue3-lazyload-pnm
# or
$ yarn add vue3-lazyload-pnm

Use

main.js

import { createApp } from 'vue'
import App from './App.vue'
import Lazy from 'vue3-lazyload-pnm'

const app = createApp(App)
app.use(Lazy, {
  // options...
  // 只有 loading 和 lifeCycle 这2个参数。。没写那么完善0.0
  loading:'....loading.xxx' // loading图 (必须加)

  // 生命周期 (可写可不写)
  lifeCycle: {
    // 1. 真正的图片加载完成
    mounted: (el: HTMLElement, binding: DirectiveBinding<any>) => {
      // el 是DOM, binding 是vue指令的,可以获取到 v-lazy 后跟着的值之类的
      // console.log('已加载完成', el, binding)
    },
    // 2. 图片报错
    error: (el: HTMLElement, binding: DirectiveBinding<any>) => {
      // console.log('出错了', el, binding)
    }
  }
})
app.mount('#app')

App.vue

<template>
  <img v-lazy="your image url" />
</template>

Css

<style>
  img[lazy='lazying'] {
    /*your style here*/
  }
  img[lazy='lazyed'] {
    /*your style here*/
  }
</style>

声明

公司项目用的是 vue3,当时用了某大佬木荣 <[email protected]>的 lazyload,功能很完善,可遇到一个很尴尬的 bug,我用 v-for 去循环的时候,只有最后一个图片的 lazy属性 才变成了 lazyed,因为我们 loading 图太大,我当时想法是直接改 css 的样式, lazy='loading' 时,图片缩小。可因为这个 bug,图片即使加载完了,也没变回lazyed。 于是就想自己搞搞。。打包这块我没用过rollup,是看木荣 <[email protected]>vue3lazyload。学习到很多,再次感谢~

原理实现

通过Vue的自定义指令 + IntersectionObserver,如果要兼容也可以使用 监听 scroll 事件来做,但因为项目是Vue3的,响应号召(doge),不做兼容