browserify->未捕获的ReferenceError：__dirname未定义

Question

未捕获的ReferenceError：__dirname未定义

这是 gulp 任务...

const { dest }   = require('gulp')
const babel      = require('babelify')
const browserify = require('browserify')
const buffer     = require('vinyl-buffer')
const connect    = require('gulp-connect')
const glob       = require('glob')
const rename     = require('gulp-rename')
const source     = require('vinyl-source-stream')
const uglify     = require('gulp-uglify')

function js(done) {
  glob(jsConf.src, (err, files) => {
    if (err) done(err)

    var b = browserify({ // @updated
      debug: true,
      ignoreMissing: true,
      // builtins: false,
      commondir: false,
      detectGlobals: false
    })

    files.forEach((file) => { b.add(file) })

    b.transform(babel, { presets: ["@babel/preset-env"] })
      .bundle()
      .pipe(source('bundle.js'))
      .pipe(dest(jsConf.build))
      .pipe(buffer())
      .pipe(uglify())
      .pipe(rename({ extname: '.min.js' }))
      .pipe(dest(jsConf.build))
      .pipe(connect.reload())

    done()
  })
}

使用detectGlobals:false时，我现在遇到此__dirname错误，否则未捕获的TypeError：fs.existsSync不是函数

解决方案是什么？在此先感谢！