PostCSS错误:[object object]不是PostCSS插件

Question

错误来自postcss插件，我想我可能写错了。

我正在尝试将cssnano和autoprefixer添加到postcss插件中。

gulp/node_modules/gulp-postcss/node_modules/postcss/lib/processor.js:143
        throw new Error(i + ' is not a PostCSS plugin');
        ^
Error: [object Object] is not a PostCSS plugin
    at Processor.normalize (/Applications/XAMPP/xamppfiles/htdocs/sites/gulp/node_modules/gulp-postcss/node_modules/postcss/lib/processor.js:143:15)
    at new Processor (/Applications/XAMPP/xamppfiles/htdocs/sites/gulp/node_modules/gulp-postcss/node_modules/postcss/lib/processor.js:51:25)
    at postcss (/Applications/XAMPP/xamppfiles/htdocs/sites/gulp/node_modules/gulp-postcss/node_modules/postcss/lib/postcss.js:73:10)
    at Transform.stream._transform (/Applications/XAMPP/xamppfiles/htdocs/sites/gulp/node_modules/gulp-postcss/index.js:47:5)
    at Transform._read (_stream_transform.js:167:10)
    at Transform._write (_stream_transform.js:155:12)
    at doWrite (_stream_writable.js:300:12)
    at writeOrBuffer (_stream_writable.js:286:5)
    at Transform.Writable.write (_stream_writable.js:214:11)
    at DestroyableTransform.ondata (/Applications/XAMPP/xamppfiles/htdocs/sites/gulp/node_modules/gulp-sass/node_modules/through2/node_modules/readable-stream/lib/_stream_readable.js:531:20)
Mac-a45e60e72dad:gulp JoeKonst$ 

我代码:

// Dependancies
var gulp = require('gulp'),
    browserSync = require('browser-sync'),
    plumber = require('gulp-plumber'),
    autoprefixer = require('gulp-autoprefixer'),
    uglify = require('gulp-uglify'),
    compass = require('gulp-compass'),
    rename = require('gulp-rename'),
    nano = require('cssnano'),
    del = require('del'),
    postcss = require('gulp-postcss'),
    sass = require('gulp-sass');
// Styles
gulp.task('styles', function(){
    gulp.src('sass/main.scss')
    .pipe(sass())
    .pipe(postcss([autoprefixer({browsers: ['last 2 versions']}), nano()]))
    .pipe(gulp.dest('css/'));
    gulp.watch('sass/**/*.scss', ['styles']);
});
// Tasks
gulp.task('default', ['styles']);

Answer 1

@rizkit -我找到了修复，它很简单。运行npm i -d postcss，问题就解决了。

基本上，你需要gulp-postcss和postcss插件在你的依赖，这是正确的工作。我假设gulp-postcss插件需要在项目中更新postcss包引用来正确修复它，所以我们只需要在将来包括gulp-postcss。

Answer 2

您正在使用gulp-autoprefixer包。这只是原始autoprefixer包的一个包装，将其变成一个gulp插件，所以你可以做.pipe(autoprefixer())。

但是postcss需要原始包本身，而不是gulp插件。

所以不用这个:

autoprefixer = require('gulp-autoprefixer'),

您需要安装autoprefixer包并执行以下操作:

autoprefixer = require('autoprefixer'),

Answer 3

顺风车&反应的问题

对于任何在使用tailwindcss设置react项目时面临上述问题的人，运行npm i postcss -D对我来说都很有效。

Answer 4

如果您使用autoprefixer 10，您可能会再次遇到这个问题，有一个github问题与一些链接和解释相关:https://github.com/postcss/autoprefixer/issues/1358

tl;博士:

• 对于postcss-cli和gulp-postcss，你必须等待更新，对于PostStylus，你可能永远不会得到更新。
• 或添加postcss作为devDependency

Answer 5

在我的情况下，我仍然得到这个错误随着无法找到build-manifest.json当我升级到Next js v 10并升级了tailwind, autoprefixer和postcss。

我不得不升级yarn，以最终摆脱错误。

我的包中更新的开发依赖项。Json格式如下:

  "devDependencies": {
    "autoprefixer": "^10.2.6",
    "babel-plugin-inline-react-svg": "^1.1.1",
    "postcss": "^8.3.0",
    "tailwindcss": "^2.1.2"
  }

Answer 6

在package.json中添加以下最小devDependencies

    "@babel/core": "^7.8.7",
    "@babel/preset-env": "^7.8.7",
    "babel-preset-env": "^1.7.0",
    "eslint": "^6.8.0",
    "eslint-config-prettier": "^6.11.0",
    "eslint-plugin-prettier": "^3.1.3",
    "gulp": "4",
    "gulp-autoprefixer": "^7.0.1",
    "gulp-babel": "^8.0.0",
    "gulp-clean": "^0.4.0",
    "gulp-eslint": "^6.0.0",
    "gulp-imagemin": "^7.1.0",
    "gulp-mode": "^1.0.2",
    "gulp-plumber": "^1.2.1",
    "gulp-rename": "^2.0.0",
    "gulp-sass": "^4.0.2",
    "gulp-sourcemaps": "^2.6.5",
    "gulp-stylelint": "^13.0.0",
    "gulp-uglify": "^3.0.2",
    "prettier": "^2.0.5",
    "stylelint": "^13.3.3",
    "stylelint-config-standard": "^20.0.0",
    "stylelint-scss": "^3.17.2"