如何为生产构建设置 Tailwind 响应式变体？

如何解决如何为生产构建设置 Tailwind 响应式变体？

根据 Tailwind Docs 设置 Craco 后，我在我的 create-react-app 应用中设置了响应式变体。这些在开发构建中完美运行，但在生产构建中没有图像加载。我在这里错过了什么？

我已经确定问题很可能出现在我的生产配置中。当我将任何 background-image 网址直接“硬编码”到我的 App.css 文件中作为测试时，它们会在生产版本中正确显示。

index.css

@tailwind base;
@tailwind components;
@tailwind utilities;

@layer utilities {
  @variants responsive {
    .test-XS {
      background-image: url('https://res.cloudinary.com/.../test-XS.png');
    }
    .test-SM {
      background-image: url('https://res.cloudinary.com/.../test-SM.png');
    }
    .test-MD {
      background-image: url('https://res.cloudinary.com/.../test-MD.png');
    }
    .test-LG {
      background-image: url('https://res.cloudinary.com/.../test-LG.png');
    }
    .test-XL {
      background-image: url('https://res.cloudinary.com/.../test-XL.png');
    }
  }
  /* There are about 20 more sets of these for different images */
}

package.json :

{
  "homepage": "http://xxx.github.io/yyy","name": "color-portfolio","version": "0.1.0","private": true,"dependencies": {
    "@craco/craco": "^6.1.1","@tailwindcss/postcss7-compat": "^2.0.2","@testing-library/jest-dom": "^5.11.9","@testing-library/react": "^11.2.5","@testing-library/user-event": "^12.6.3","autoprefixer": "^9.8.6","postcss": "^7.0.35","react": "^17.0.1","react-dom": "^17.0.1","react-router-dom": "^5.2.0","react-scripts": "4.0.2","tailwindcss": "npm:@tailwindcss/postcss7-compat@^2.0.2","web-vitals": "^1.1.0"
  },"scripts": {
    "predeploy": "npm run build","deploy": "gh-pages -d build","start": "craco start","build": "craco build","test": "craco test","eject": "react-scripts eject"
  },"eslintConfig": {
    "extends": [
      "react-app","react-app/jest"
    ]
  },"browserslist": {
    "production": [
      ">0.2%","not dead","not op_mini all"
    ],"development": [
      "last 1 chrome version","last 1 firefox version","last 1 safari version"
    ]
  },"devDependencies": {
    "gh-pages": "^3.1.0"
  }
}

craco.config.js：

module.exports = {
  style: {
    postcss: {
      plugins: [
        require('tailwindcss'),require('autoprefixer'),],},}

tailwind.config.js :

module.exports = {
  purge: ['./src/**/*.{js,jsx,ts,tsx,css}','./public/index.html'],darkMode: false,// or 'media' or 'class'
  theme: {
    extend: {},variants: {
    extend: {},plugins: [],}

解决方法

问题出在我在 className 中使用的串联。

Tailwind 的文档 here 中对此进行了介绍。

“不要使用字符串连接来创建类名”

我做错的一个例子：

<div className={`card bg-contain ${props.image}-XS sm:${props.image}-SM md:${props.image}-MD lg:${props.image}-LG xl:${props.image}-XL`}>

我现在部署项目的解决方法：更改它以便 Tailwind 不会通过指定要在配置中清除的层来“摇晃”实用程序层（更多信息请参见 Tailwind 文档 here）：

tailwind.config.js :

module.exports = {
  purge: {
    layers: ['base','components'],content: ['./src/**/*.{js,ts,tsx}','./public/index.html']
  },darkMode: false,// or 'media' or 'class'
  theme: {
    extend: {},},variants: {
    extend: {},plugins: [],}

我确信这会使我的构建大小不必要地大，但至少我的项目已部署，直到我想出更好的方法来合并这些动态类变体。