在Vite Vue3.2 项目优雅的使用Svg Icon

1. 安装 svg-sprite-loader

npm i svg-sprite-loader --save-dev

2. SvgIcon component

<!-- /src/components/SvgIcon/icon.vue -->
<script setup lang="ts">
import {computed, useCssModule, useAttrs} from "vue";

export interface SvgIconProps {
  name: string
}

const props = defineProps<SvgIconProps>()

const styles = useCssModule()
const attrs = useAttrs()

const iconName = computed(() => `#icon-${props.name}`);
const svgClass = computed(() => {
  const className = [styles['svg-icon']]
  if (props.name) className.push(`icon-${props.name}`)
  return className
})
</script>

<template>
  <svg :class="svgClass" v-bind="attrs">
    <use :xlink:href="iconName"></use>
  </svg>
</template>

<style module>
.svg-icon {
 /* width: 1em;
  height: 1em;*/
  fill: currentColor;
  vertical-align: middle;
  overflow: hidden;
}
</style>

// /src/components/SvgIcon/index.ts
import SvgIcon from './icon.vue'
import type {SvgIconProps} from './icon.vue'

export {
    SvgIcon
}

export type {
    SvgIconProps
}

3. 新建plugins文件下新建svgBuilder.ts

// /plugins/svgBuilder.ts
import {readFileSync, readdirSync} from 'fs'
import {join as pathJoin} from 'path'
import {Plugin} from 'vite'

let idPrefix = ''
const svgTitle = /<svg([^>+].*?)>/
const clearHeightWidth = /(width|height)="([^>+].*?)"/g

const hasViewBox = /(viewBox="[^>+].*?")/g

const clearReturn = /(\r)|(\n)/g

const findSvgFile = (dir: string) => {
    const svgRes: string[] = []
    const directory = readdirSync(dir, {withFileTypes: true})
    for (const dirent of directory) {
        if (dirent?.isDirectory()) {
            svgRes.push(...findSvgFile(pathJoin(dir, dirent.name, '/')))
        } else {
            const svg = readFileSync(pathJoin(dir, dirent.name))
                .toString()
                .replace(clearReturn, '')
                .replace(svgTitle, ($1: string, $2: string) => {
                    let width = '0'
                    let height = '0'
                    let content = $2.replace(
                        clearHeightWidth,
                        (s1, s2:string, s3:string) => {
                            if (s2 === 'width') {
                                width = s3
                            } else if (s2 === 'height') {
                                height = s3
                            }
                            return ''
                        }
                    )
                    if (!hasViewBox.test($2)) {
                        content += `viewBox="0 0 ${width} ${height}"`
                    }
                    return `<symbol id="${idPrefix}-${dirent.name.replace(
                        '.svg',
                        ''
                    )}" ${content}>`
                })
                .replace('</svg>', '</symbol>')
            svgRes.push(svg)
        }
    }
    return svgRes
}

const svgBuilder = (path: string, prefix = 'icon'): Plugin => {
    idPrefix = prefix
    const res = findSvgFile(path)
    return {
        name: 'svg-transform',
        transformIndexHtml(html) {
            return html.replace(
                '<body>',
                `<body>
                <svg xmlns="http://www.w3.org/2000/svg" 
                    xmlns:xlink="http://www.w3.org/1999/xlink" 
                    style="position: absolute; width: 0; height: 0">
              ${res.join('')}
              </svg>`
            )
        }
    }
}

export default svgBuilder

4. 更新tsconfig.node.json

// tsconfig.node.json
{
  // ...
  "include": ["vite.config.ts", "./plugins/*"]
}

5. src目录下新建icons文件夹内存放svg图标

6. vite.config.ts 中

import svgBuilder from './plugins/svgBuilder'
import {resolve} from "path";

// ...
plugins: [
          // ...
          svgBuilder(resolve('./src/icons'))
         ]

7. 使用

<script setup lang="ts">
import {SvgIcon} from "@/components/SvgIcon";
</script>

<template>
  <!-- name 为 svg icon 的文件名 -->
  <SvgIcon name="cookie"/>
</template>
posted @ 2021-10-26 14:09  demo_you  阅读(748)  评论(0)  编辑  收藏  举报