Minify css + Gulp

要修复代码，请尝试：

gulp.task('sass', function() {
return gulp.src(['scss/*.scss'])
.pipe(sass()) // converter o Sass em CSS
.pipe(gulp.dest('css'));
});
gulp.task('watch', function() {
gulp.watch(['scss/*.scss'], gulp.series('sass'));
});
gulp.task('default', gulp.series('sass', 'watch'));

但这种形式的函数更好：

// renamed since your plugin name is apparently `sass` as well
function sass2css() {   
return gulp.src(['scss/*.scss'])
.pipe(sass()) // converter o Sass em CSS
.pipe(gulp.dest('css'));
};
function watch() {
gulp.watch(['scss/*.scss'], gulp.series(sass2css));
});
gulp.task('default', gulp.series(sass2css, watch));

这是我的gump文件，它编译并缩小了css和js(它也有一些图像和php文件的数据，但它们是未使用的(

var gulp = require('gulp'),
gutil = require('gulp-util'),
touch = require('gulp-touch-cmd'),
plugin = require('gulp-load-plugins')(),
merge = require('merge-stream');
// Select Foundation components, remove components project will not use
const SOURCE = {
scripts: [
// Place custom JS here, files will be concantonated, minified if ran with --production
'assets/scripts/**/*.js',
],
// Scss files will be concantonated, minified if ran with --production
styles: 'assets/style/scss/**/*.scss',
// Images placed here will be optimized
images: 'assets/images/src/**/*',
php: '**/*.php'
};
const ASSETS = {
styles: 'assets/style/',
stylesDist: 'assets/dist/style',
scripts: 'assets/scripts/',
scriptsDist: 'assets/dist/scripts',
images: 'assets/images/',
all: 'assets/dist/'
};
gulp.task('log', function() {
console.log(ASSETS.styles);
});
// Compile Sass, Autoprefix and minify
gulp.task('styles', function () {
var bulk = gulp.src(SOURCE.styles);
return merge(bulk)
.pipe(plugin.plumber(function (error) {
gutil.log(gutil.colors.red(error.message));
this.emit('end');
}))
.pipe(plugin.sourcemaps.init())
.pipe(plugin.sass())
.pipe(plugin.autoprefixer({
browsers: [
'last 2 versions',
'ie >= 9',
'ios >= 7'
],
cascade: false
}))
.pipe(plugin.cssnano({ safe: true, minifyFontValues: { removeQuotes: false } }))
.pipe(plugin.sourcemaps.write('.'))
.pipe(gulp.dest(ASSETS.stylesDist))
.pipe(touch());
});
// GULP FUNCTIONS
// JSHint, concat, and minify JavaScript
gulp.task('scripts', function () {
// Use a custom filter so we only lint custom JS
return gulp.src(SOURCE.scripts)
.pipe(plugin.plumber(function (error) {
gutil.log(gutil.colors.red(error.message));
this.emit('end');
}))
.pipe(plugin.sourcemaps.init())
.pipe(plugin.babel({
presets: ['es2015'],
compact: true,
ignore: ['what-input.js']
}))
.pipe(plugin.concat('scripts.js'))
.pipe(plugin.uglify())
.pipe(plugin.sourcemaps.write('.')) // Creates sourcemap for minified JS
.pipe(gulp.dest(ASSETS.scriptsDist))
.pipe(touch());
});
// Watch files for changes (without Browser-Sync)
gulp.task('watch', function () {
// Watch .scss files
gulp.watch(SOURCE.styles, gulp.parallel('styles'));
// Watch scripts files
gulp.watch(SOURCE.scripts, gulp.parallel('scripts'));
});

这是我用过的另一个

// Initialize modules
// Importing specific gulp API functions lets us write them below as series() instead of gulp.series()
const { src, dest, watch, series, parallel } = require('gulp');
// Importing all the Gulp-related packages we want to use
const sourcemaps = require('gulp-sourcemaps');
const sass = require('gulp-sass');
const concat = require('gulp-concat');
const uglify = require('gulp-uglify');
const postcss = require('gulp-postcss');
const autoprefixer = require('autoprefixer');
const cssnano = require('cssnano');
var replace = require('gulp-replace');
// File paths
const files = { 
scssPath: 'site/templates/styles/sass/**/*.scss',
jsPath: 'site/templates/scripts/**/*.js'
}
// Sass task: compiles the style.scss file into style.css
function scssTask(){    
return src(files.scssPath)
.pipe(sourcemaps.init()) // initialize sourcemaps first
.pipe(sass()) // compile SCSS to CSS
.pipe(postcss([ autoprefixer(), cssnano() ])) // PostCSS plugins
.pipe(sourcemaps.write('.')) // write sourcemaps file in current directory
.pipe(dest('site/templates/dist')
); // put final CSS in site/templates/dist folder
}
// JS task: concatenates and uglifies JS files to script.js
function jsTask(){
return src([
files.jsPath
//,'!' + 'includes/js/jquery.min.js', // to exclude any specific files
])
.pipe(concat('all.js'))
.pipe(uglify())
.pipe(dest('site/templates/dist')
);
}
// Cachebust
var cbString = new Date().getTime();
function cacheBustTask(){
return src(['index.html'])
.pipe(replace(/cb=d+/g, 'cb=' + cbString))
.pipe(dest('.'));
}
// Watch task: watch SCSS and JS files for changes
// If any change, run scss and js tasks simultaneously
function watchTask(){
watch([files.scssPath, files.jsPath], 
series(
parallel(scssTask, jsTask)
)
);    
}
// Export the default Gulp task so it can be run
// Runs the scss and js tasks simultaneously
// then runs cacheBust, then watch task
exports.default = series(
parallel(scssTask, jsTask), 
watchTask
);