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import React from 'react'
// dead code - useless imports
import ComponentA from 'common/components/ComponentA'
import ComponentB from 'common/components/ComponentB'
import ComponentC from 'common/components/ComponentC'
import SomeWrapper from 'common/components/SomeWrapper'

// dead code - unused constant declaration
const MAPPER = {
  TYPE_A: ComponentA,

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import React from 'react'
// dead code - useless imports
import ComponentA from 'common/components/ComponentA'
import ComponentB from 'common/components/ComponentB'
import ComponentC from 'common/components/ComponentC'
import SomeWrapper from 'common/components/SomeWrapper'

// dead code - unused constant declaration
const MAPPER = {
  TYPE_A: ComponentA,

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import React from 'react'
// dead code - useless imports
import ComponentA from 'common/components/ComponentA'
import ComponentB from 'common/components/ComponentB'
import ComponentC from 'common/components/ComponentC'
import SomeWrapper from 'common/components/SomeWrapper'

export const SomeComponent = ({ type }) => {
  return null
}

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export const SomeComponent = ({ type }) => {
  return null
}

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const { minify } = require('terser')

module.exports = function modifyModuleSourceLoader (source, map, meta) {
  const callback = this.async()
  const { terserOptions } = this.getOptions()
  minify(source, terserOptions)
    .then(data => {
      const { code } = data || {}
      callback(null, code, map, meta)
    })

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{
  "toplevel": true,
  "ecma": 8,
  "compress": {
    "pure_funcs": [
      "console.log",
      "console.warn"
    ],
    "toplevel": true,
    "hoist_props": false

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{
  "toplevel": true,
  "ecma": 8,
  "compress": {
    "global_defs": {
      "__MOBILE__": true
    },
    "pure_funcs": [
      "console.log",

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import Mobile from './mobile'
import Desktop from './desktop'

export default () => __MOBILE__ ? <Mobile /> : <Desktop />

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import Mobile from './mobile'

export default () => <Mobile />

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import Desktop from './desktop'

export default () => <Desktop />