错误: PostCSS 插件 autoprefixer 需要 PostCSS 8。更新 PostCSS 或降级此插件

无论何时运行 npm start，都会得到这个错误。 我尝试了几种方法，但没有一种对我有用。我试着把 autoprefixer 的版本改为9.8.6，但是没有用。 请帮我解决这个问题

这是我的包 Json

{
"name": "reactgallery",
"version": "0.1.0",
"private": true,
"dependencies": {
"@testing-library/jest-dom": "^4.2.4",
"@testing-library/react": "^9.5.0",
"@testing-library/user-event": "^7.2.1",
"react": "^16.13.1",
"react-dom": "^16.13.1",
"react-scripts": "3.4.3"
},
"scripts": {
"start": "npm run watch:css && react-scripts start",
"build": "npm run build:css && react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject",
"build:css": "postcss src/assets/tailwind.css -o src/assets/main.css",
"watch:css": "postcss src/assets/tailwind.css -o src/assets/main.css"
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
},
"devDependencies": {
"autoprefixer": "^9.8.6",
"postcss-cli": "^7.1.2",
"tailwindcss": "^1.8.10"
}
}
91691 次浏览
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I am not sure about this but can you try installing postcss as a dependency?

npm i postcss
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最佳答案

Quick fix

Downgrade your autoprefixer to version 9, use

"autoprefixer": "^9.0.0"

in your dev dependencies.

More details

PostCSS was updated to version 8, however, PostCSS CLI has not yet been updated to handle PostCSS plugins which use the new PostCSS 8+ API. Autoprefixer uses the new PostCSS 8 API since version 10.

This is documented under known issues in the PostCSS GitHub page.

Once PostCSS CLI is updated to handle plugins that use the new PostCSS 8+ API, this will likely not be an issue. But until then, you may need to downgrade some PostCSS plugins to avoid errors.

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Ok, to me was fixed removing package-lock.json and installing:

"tailwindcss": "^1.8.10"
"postcss-cli": "^7.1.0"
"autoprefixer": "^9.7.5"
小开

the following combo works as of Oct 2020

  ...
"dependencies": {
"autoprefixer": "^9.8.6",
"postcss-cli": "^8.1.0",
"tailwindcss": "^1.9.2"
}
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Based on documentation link are drop some support for old NodeJS and you must upgrade manually the packages. Example in my case for a project based on webpack need just to update those dependencies:

  "dependencies": {
"autoprefixer": "^10.0.2",
"postcss": "^8.1.7",
"postcss-loader": "^4.0.4"
}

So you do not need to downgrade autoprefixer :)

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For Next.js 10 you just have to do

npm install tailwindcss@latest postcss@latest autoprefixer@latest

Source This issue here

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If you're having this problem and you're using Tailwind CSS v2, try this

npm uninstall tailwindcss postcss autoprefixer
npm install tailwindcss@npm:@tailwindcss/postcss7-compat postcss@^7 autoprefixer@^9

source: https://tailwindcss.com/docs/installation#post-css-7-compatibility-build

小开

I had this problem with Laravel-mix 5 and PostCSS 8 and Tailwind 2.
With Laravel-mix 6 (beta at the moment) this was solved.

npm install laravel-mix@next --save-dev
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These steps worked for me. This was from github

npm uninstall tailwindcss postcss autoprefixer
npm install tailwindcss@latest postcss@latest autoprefixer@latest


npx tailwindcss init -p


npm uninstall tailwindcss postcss autoprefixer
npm install tailwindcss@npm:@tailwindcss/postcss7-compat postcss@^7 autoprefixer@^9
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"dependencies": {
"autoprefixer": "^9.8.6",
"postcss": "^8.0.0",
"postcss-cli": "^8.1.0",
"tailwindcss": "npm:@tailwindcss/postcss7-compat@^2.0.2",
},

Dependecies object and version can be modified directly in the package.json file and it work

小开

Using the official solution fix for PostCSS 7 compatibility build

yarn remove tailwindcss postcss autoprefixer
yarn add -D tailwindcss@npm:@tailwindcss/postcss7-compat @tailwindcss/postcss7-compat postcss@^7 autoprefixer@^9
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Its Simple,

npm install postcss@^8

It worked very well for me.


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