Webpack Strip Block

Webpack loader to strip blocks of code marked by special comment tags. Useful for removing code that you don't want in your production webpack bundle (e.g. verbose console warnings, etc).

Example:

In your client js source files:

/* debug:start */
console.log('debug');
/* debug:end */

var makeFoo = function(bar, baz) {
    // The following code will be stripped with our webpack loader
    /* develblock:start */
    if (bar instanceof Bar !== true) {
        throw new Error('makeFoo: bar param is required and must be instance of Bar');
    }
    /* develblock:end */

    // This code would remain
    return new Foo(bar, baz);
}

<div>
    <!-- develblock:start -->
    <div class="debug">

    </div>
    <!-- develblock:end -->
</div>

In your webpack config, specify the loader:

var blocks = ['develblock'];

if (process.env.NODE_ENV === 'development') {
    blocks.push('debug');
}

module.exports = {
    module: {
        rules: [
            {
                test: /\.js$/,
                enforce: 'pre',
                exclude: /(node_modules|bower_components|\.spec\.js)/,
                use: [{
                    loader: 'webpack-strip-blocks',
                    options: {
                        blocks: blocks,
                        start: '/*',
                        end: '*/'
                    }
                }]
            }, {
                test: /\.html$/,
                enforce: 'pre',
                use: [{
                    loader: 'webpack-strip-blocks',
                    options: {
                        blocks: blocks,
                        start: '<!--',
                        end: '-->'
                    }
                }]
            }
        ]
    }
};

Laravel Mix sample

let mix = require( 'laravel-mix' );

/*
 |--------------------------------------------------------------------------
 | Webpack Strip Blocks
 |--------------------------------------------------------------------------
 |
 | Here you can define your custom strip tags. For example, you may use:
 | [ 'develblock', 'debug' ]
 | in order to strip "debug:start" and "debug:end" as well
 |
 */

const blocks = mix.inProduction() ? [ 'develblock' ] : null;

mix.webpackConfig( {
  module  : {
    rules : [
      {
        test    : /\.js$/,
        enforce : 'pre',
        exclude : /(node_modules|bower_components|\.spec\.js)/,
        use     : [
          {
            loader  : 'webpack-strip-blocks',
            options : {
              blocks : blocks,
              start  : '/*',
              end    : '*/'
            }
          }
        ]
      }
    ]
  }
} );