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| let gulp = require('gulp') let cleanCSS = require('gulp-clean-css') let htmlmin = require('gulp-htmlmin') let htmlclean = require('gulp-htmlclean') let babel = require('gulp-babel') let uglify = require('gulp-uglify') let imagemin = require('gulp-imagemin')
const root = './public'
const pattern = '**/*'
gulp.task('minify-html', function() { return gulp .src(`${root}/${pattern}.html`) .pipe(htmlclean()) .pipe( htmlmin({ removeComments: true, minifyJS: true, minifyCSS: true, minifyURLs: true }) ) .pipe(gulp.dest('./public')) })
gulp.task('minify-css', function() { return gulp .src(`${root}/${pattern}.css`) .pipe( cleanCSS({ compatibility: 'ie8' }) ) .pipe(gulp.dest('./public')) })
gulp.task('minify-js', function() { return gulp .src(`${root}/${pattern}.js`) .pipe( babel({ presets: ['env'] }) ) .pipe(uglify()) .pipe(gulp.dest('./public')) })
gulp.task('minify-images', function() { return gulp .src(`${root}/images/${pattern}`) .pipe( imagemin( [ imagemin.gifsicle({ optimizationLevel: 3 }), imagemin.jpegtran({ progressive: true }), imagemin.optipng({ optimizationLevel: 7 }), imagemin.svgo() ], { verbose: true } ) ) .pipe(gulp.dest('./public/images')) })
gulp.task('default', gulp.series('minify-html', 'minify-css', 'minify-js'))
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