DEBUG build is not compatible with IE8 about react-static-boilerplate

[bcowgill]

I have a fix. Just need to use different options to the Uglify when debugging. Must still compress, but don't mangle and beautify the output again.

// Optimize the bundle in release (production) mode
if (!DEBUG) {
  config.plugins.push(new webpack.optimize.DedupePlugin())
}

// Must always Uglify somehow or it won't work in IE8
const uglyOptions = !DEBUG ? {
  compress: {
    warnings: VERBOSE,
    typeofs: false, // suggested for IE10 or less
    screw_ie8: false
  },
  mangle: { screw_ie8: false },
  output: { screw_ie8: false }
} : {
  mangle: false,
  compress: {
    drop_debugger: false,
/* could set lots more settings false to leave the code as is. */
    typeofs: false, // suggested for IE10 or less
    warnings: VERBOSE,
    screw_ie8: false
  },
  output: {
    beautify: true,
    comments: true,
    bracketize: true,
    indent_level: 2,
    keep_quoted_props: true,
/* more settings to your liking... */
    screw_ie8: false
  },
};
config.plugins.push(new webpack.optimize.UglifyJsPlugin(uglyOptions))

if (!DEBUG) {
  config.plugins.push(new webpack.optimize.AggressiveMergingPlugin())
  config.module.loaders
    .find(x => x.loader === 'babel-loader').query.plugins
    .unshift(
    'transform-react-remove-prop-types',
    'transform-react-constant-elements',
    'transform-react-inline-elements',
    'transform-es3-modules-literals',
    'transform-es3-member-expression-literals',
    'transform-es3-property-literals'
    )
}

[copilot-is]

Thank you.
Fix 4c38aef