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vue3-lazy-img

v1.0.2

Published

intersectionObserver 实现图片懒加载

Downloads

14

Readme

描述

基于Vue3的懒加载组件

  • 使用 IntersectionObserver 实现图片懒加载
  • 使用intersection-observer-polyfill 兼容低版本浏览器
  • 兼容企业微信 不支持 属性 isIntersecting
  • 判断浏览器是否缓存了图片,如果缓存存在,直接展示,即immediately = true
  • 图片加载失败 500ms 会重试

使用

  1. 安装
yarn add vue3-lazy-img
npm i vue3-lazy-img
  1. 全局mian.ts 里引入
import LazyImg from 'vue3-lazy-img'
import 'vue3-lazy-img/dist/index.css'  // 可以省略

createApp(App)
.use(LazyImg)\
.mount('#app')

or 组件里引入

import { LazyImg } from "vue3-lazyload-img"

ts配置:

// shims-vue.d.ts
declare module 'vue3-lazy-img'
  1. 组件里使用
 <LazyImg v-for="(item, index) in showImages" :key="index" :src="item" :immediately="index === 0 ? true : false" />

4.attr | 属性 | 描述 | 类型| 是否必填 | | -- | -- | --- | -- | | src | 图片路径 | String | 必填 | | immediately | 是否立即加载 | Boolean| 否 | | title | alt文字 | String| 否 |

  1. index.css 简单的动画,可以不引入
.opacity0 {
    opacity: 0;
}
.fade {
    animation-name: FadeIn;
    animation-duration: 300ms;
    transition-timing-function: linear;
}

@keyframes FadeIn {
    0% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}

@-moz-keyframes FadeIn {
    0% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}

@-webkit-keyframes FadeIn {
    0% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}

@-o-keyframes FadeIn {
    0% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}

@-ms-keyframes FadeIn {
    0% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}