'use strict';  // 载入Gulp模块 var gulp = require('gulp'); var less = require('gulp-less'); var autoprefixer = require('gulp-autoprefixer');//兼容浏览器 var cssnano = require('gulp-cssnano'); var browserSync = require('browser-sync');//热刷新服务器 var reload = browserSync.reload;  // LESS编译 压缩  gulp.task('less', function() {   gulp.src(['src/css/*.less', '!src/css/_*.less'])     //less中使用@import url('_a.less')     .pipe(less())     .pipe(autoprefixer({       browsers: ['last 2 versions']     }))     .pipe(cssnano())     .pipe(gulp.dest('dist/css'))     .pipe(reload({       stream: true     })); });  var concat = require('gulp-concat'); var uglify = require('gulp-uglify'); var babel=require('gulp-babel') var browserify=require('gulp-browserify')  // JS合并 压缩混淆 gulp.task('js', function() {   gulp.src('src/js/*.js')     .pipe(concat('app.js'))         .pipe(babel()) //使用es6,加此项         .pipe(browserify({ //浏览器中兼容require等,使用async时使用             insertGlobals: true         }))     .pipe(uglify())     .pipe(gulp.dest('dist/js'))     .pipe(reload({       stream: true     })); });  // 图片复制 gulp.task('pic', function() {   gulp.src('src/pic/*.*')     .pipe(gulp.dest('dist/pic'))     .pipe(reload({       stream: true     })); })  var htmlmin = require('gulp-htmlmin'); // HTML gulp.task('html', function() {   gulp.src('src/*.html')     .pipe(htmlmin({       collapseWhitespace: true,         collapseBooleanAttributes: true,       removeAttributeQuotes: true,       removeComments: true,       removeEmptyAttributes: true,       removeScriptTypeAttributes: true,       removeStyleLinkTypeAttributes: true,     }))     .pipe(gulp.dest('dist'))     .pipe(reload({       stream: true     })); });  gulp.task('serve', ['less', 'js', 'pic', 'html'], function() {   browserSync({     notify: false,     port: 3003,     server: {       baseDir: ['dist']     }   },function (err, bs) {         console.log(bs.options.getIn(["urls", "local"]));     });     gulp.watch('src/css/*.less', ['less']);   gulp.watch('src/js/*.js', ['js']);   gulp.watch('src/pic/*.*', ['pic']);   gulp.watch('src/*.html', ['html']); });   gulp.task('default',['serve']);

gulpfile.js