gulp处理css

autoprefixer 加前缀

$_> npm i -D gulp-autoprefixer

let gulp = require('gulp'),
    autoprefixer = require('gulp-autoprefixer');
 
gulp.task('default', function () {
    gulp.src('./css/index.css')
        .pipe(autoprefixer({
            cascade: true, //是否美化属性值 默认：true 像这样：
            remove:true //是否去掉不必要的前缀 默认：true
        }))
        .pipe(gulp.dest('dist/css'));
});

// package.json
{
  "name": "gulp1",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "clean": "^4.0.2",
    "del": "^5.1.0",
    "delete": "^1.1.0",
    "gulp": "^4.0.2",
    "gulp-autoprefixer": "^7.0.0"
  },
  "browserslist": [ // 兼容的浏览器列表
    "Android >= 4.4",
    "iOS >= 7"
  ]
}

浏览器列表

精简css, 如果出错可能是PhantomJS的问题，卸载模块重新安装

$_> npm i -D gulp-nucss-sp
let gulp = require('gulp'); 
let uncss = require('gulp-uncss-sp');
 
gulp.task('default', function () { 
    return gulp.src('*.css') //需要进行处理的css
        .pipe(uncss({
            html:['*.html']  //使用css的html文件，可以多个
        }))
        .pipe(gulp.dest('./dist'));  //输出目录
});