text: const {src, dest, series} = require('gulp')
  const babel = require('gulp-babel')
  const uglify = require('gulp-uglify')
  const rename = require('gulp-rename')
  
  const stylus = require('gulp-stylus')
  const autoprefixer = require('gulp-autoprefixer')
  const cssmin = require('gulp-cssmin')
  
  // 编译函数
  function convertJs () {
    return src('./src/js/components/*.js')
      .pipe(babel({
        presets: ['@babel/env']
      }))
      .pipe(uglify())
      .pipe(rename({suffix: '.min'}))
      .pipe(dest('./src/js/components/lib'))
  }
  
  // 打包默认的styl
  function compile () {
    return src('./src/styles/*.styl')
      .pipe(stylus())
      .pipe(autoprefixer({
        browsers: ['ie > 9', 'last 2 versions'],
        cascade: false
      }))
      .pipe(cssmin()).pipe(rename({suffix: '.min'}))
      .pipe(dest('./src/styles'))
  }
  
  exports.build = series(convertJs)
  