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@kwai-explore/picture.vue

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@kwai-explore/picture.vue

用于展示多种图片格式的 picture 组件。

  • 0.0.19
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23
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@kwai-explore/picture.vue

用于展示多种图片格式的 picture 组件。

安装

pnpm install @kwai-explore/picture.vue

使用

建议配合 (vite-plugin-image-presets) 使用

安装 vite-plugin-image-presets

pnpm add -D vite-plugin-image-presets

建议配置

vite.config.ts

import imagePresets, { formatPreset } from 'vite-plugin-image-presets';

// ...
 plugins: [
   vue(),
   imagePresets({
     modern: formatPreset({
       formats: {
         avif: {},
         webp: {},
         original: {},
       },
       loading: 'lazy',
     }),
   }),
 ],

根据上面的配置添加类型:

vite-env.d.ts

这里的文档需要换一下:理论上应该标记的是自己生成的类型

declare module '*?preset=modern' {
    type SourceOption = {
        type: string;
        srcset: string;
    };
    type ImgOption = {
        src: string;
        // 这下面的属性需要与 vite config 里的 formatPreset 配置同步修改
        loading: 'lazy';
    };
    type PictureOption = [...SourceOption[], ImgOption];

    const src: PictureOption;
    export default src;
}

在代码中使用

Picture 组件接受的属性跟 img 相同,唯一的例外是 src 接收一个数组,一个例子是

  [{
    type: 'image/webp',
    srcset: '/assets/logo.ffc730c4.webp 48w, /assets/logo.1f874174.webp 96w',
  },
  {
    type: 'image/jpeg',
    srcset: '/assets/logo.063759b1.jpeg 48w, /assets/logo.81d93491.jpeg 96w',
    src: '/assets/logo.81d93491.jpeg',
    class: 'img thumb',
    loading: 'lazy',
  ]

在我们配置好 vite-plugin-image-presets 之后,可以直接在 import 图片的语句后面加一个 query,产出的数据就是上面需要的格式。

<script setup lang="ts">
import Picture from '@kwai-explore/picture';
import examplePic from './components/example.jpg?preset=modern';
</script>

<template>
  <Picture :src="examplePic"></Picture>
</template>

完整支持的属性

interface PictureProp {
  src: ImgHTMLAttributes[];
  // 默认是empty。 color 会展示一个渐变色块的 loading 效果,加上 fade-in 的加载成功的渐变效果。
  placeholder: 'empty' | 'color';
}

建议添加 eslint 规则

        'vue/no-restricted-html-elements': [
            'warn',
            {
                element: 'img',
                message: 'Prefer use of our @kwai-explore/picture.vue component',
            },
        ],

对应的行为

开发环境(vite dev) 初次请求图片资源时需要进行格式转换,图片的加载时间比较长。

生产环境(vite build) 会把需要的图片格式都构建出来。

兼容性

vue >= 2.7

FAQs

Package last updated on 16 Aug 2023

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