TS2322 Type Element is not assignable to type ReactNode-出现在preact-CFANZ编程社区

React18+Typescript+craco配置最小化批量引入Svg并应用的组件

前言

无论是哪种 Web UI 框架都不可避免的要与 Svg 打交道，那么批量引入才更方便管理 Svg。

创建React + Typescript项目

npx create-react-app my-ts-app --template typescript

通过require.context实现批量引入Svg

// src/assets/icons/index.ts
const requireAll = (requireContext: __WebpackModuleApi.RequireContext) => requireContext.keys().map(requireContext)
const icons = require.context('./', false, /\.svg$/)
requireAll(icons)

export {}

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安装@types/webpack-env解决类型报错

npm install --save @types/webpack-env

安装craco，覆盖React原有的webpack配置文件

npm i -D @craco/craco @craco/types

修改package.json脚本快捷方式为craco启动项目

"scripts": {
-  "start": "react-scripts start"
+  "start": "craco start"
-  "build": "react-scripts build"
+  "build": "craco build"
-  "test": "react-scripts test"
+  "test": "craco test"
}

安装svg-sprite-loader生成Svg雪碧图

npm install svg-sprite-loader -D

安装svgo-loader去除Svg的fill和stroke属性

npm install svgo-loader --save-dev

新增craco.config.js配置文件

const path = require('path');

module.exports = {
    webpack: {
        alias: {
            '@': path.resolve(__dirname, 'src'),
        },
        configure: (webpackConfig) => {
            const oneOfRule = webpackConfig.module.rules.find((rule) => rule.oneOf)
            if (oneOfRule) {
                oneOfRule.oneOf.splice(0, 0, {
                    test: /\.svg$/,
                    include: path.resolve(__dirname, "src/assets/icons"),
                    use: [
                        {
                            loader: 'svg-sprite-loader',
                            options: {
                                symbolId: "icon-[name]"
                            }
                        },
                        {
                            loader: 'svgo-loader', options: {
                                plugins: [
                                    {
                                        name: 'removeAttrs',
                                        params: {
                                            attrs: '(fill|stroke)'
                                        }
                                    }
                                ]
                            }
                        }
                    ]
                })
            }
            return webpackConfig
        },
    }
}

封装Icon组件应用Svg图标

// src/components/Icon/index.tsx
import React from "react";
import classes from './index.module.css'

interface IconProps {
    name: string
    width: string
    height?: string
    fill?: string
}

const Icon = ({ name, width, height, fill }: IconProps) => {
    return (
        <svg className={classes.icon} aria-hidden="true" width={width} height={height}>
            <use xlinkHref={'#icon-' + name} style={{color: fill}}></use>
        </svg>
    )
}

export default Icon

/* src/components/Icon/index.module.css */
.icon {
    vertical-align: -0.15em;
    fill: currentColor;
    overflow: hidden;
    font-size: 0;
}

在index.tsx入口文件中引入批量引入Svg的函数

// src/index.tsx
import '@/assets/icons/index';

在App.tsx中引入Icon组件并应用

// src/App.tsx
import React from 'react';
import Icon from '@/components/Icon/index'
import './App.css';

function App() {
    return (
        <div className="App">
            <Icon name='p_ding' width="30px" height='30px' fill="red" />
            <Icon name='p_book' width="30px" height='30px' />
        </div>
    );
}

export default App;

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修改tsconfig.json新增别名@解决报错

{
  "compilerOptions": {
    "target": "es5",
    "lib": [
      "dom",
      "dom.iterable",
      "esnext"
    ],
    "allowJs": true,
    "skipLibCheck": true,
    "esModuleInterop": true,
    "allowSyntheticDefaultImports": true,
    "strict": true,
    "forceConsistentCasingInFileNames": true,
    "noFallthroughCasesInSwitch": true,
    "module": "esnext",
    "moduleResolution": "node",
    "resolveJsonModule": true,
    "isolatedModules": true,
    "noEmit": true,
    "jsx": "react-jsx",
    "baseUrl": "./src",
    "paths": {
        "@/*": ["./*"]
    }
  },
  "include": [
    "src"
  ]
}

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启动项目，目录结构如下

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参考

https://ryanhutzley.medium.com/dynamic-svg-imports-in-create-react-app-d6d411f6d6c6
https://github.com/airbnb/babel-plugin-inline-react-svg/issues/51
https://blog.shianqi.com/2017/12/13/Webpack/SVG-sprite/
https://pganalyze.com/blog/building-svg-components-in-react
https://juejin.cn/post/6844904194747400199
https://blog.csdn.net/qq_44883318/article/details/132202175
https://juejin.cn/post/7035808121272893477
https://github.com/dilanx/craco/issues/395
https://segmentfault.com/a/1190000023807589
https://blog.csdn.net/qq_39953537/article/details/93760188
https://juejin.cn/post/7207336474150273061
https://juejin.cn/post/6918723151732391950#heading-0
https://juejin.cn/post/6981836039463632932
https://segmentfault.com/a/1190000039850941