old_contents: /* ==========================================================================
     Settings for webpack JavaScript bundling system.
     ========================================================================== */
  
  const BROWSER_LIST = require( './browser-list-config' );
  const webpack = require( 'webpack' );
  const TerserPlugin = require( 'terser-webpack-plugin' );
  
  /* Commmon webpack 'module' option used in each configuration.
     Runs code through Babel and uses global supported browser list. */
  const COMMON_MODULE_CONFIG = {
    rules: [ {
      use: {
        loader: 'babel-loader?cacheDirectory=true',
        options: {
          presets: [ [ '@babel/preset-env', {
            targets: {
              browsers: BROWSER_LIST.LAST_2_PLUS_IE_9_AND_UP
            },
            debug: false
          } ] ]
        }
      }
    } ]
  };
  
  /* Set warnings to true to show linter-style warnings.
     Set mangle to false and beautify to true to debug the output code. */
  const COMMON_UGLIFY_CONFIG = new TerserPlugin( {
    cache: true,
    parallel: true,
    terserOptions: {
      ie8: false,
      ecma: 5,
      warnings: true,
      mangle: true,
      output: {
        comments: false,
        beautify: false
      }
    }
  } );
  
  const commonConf = {
    cache: true,
    module: COMMON_MODULE_CONFIG,
    mode: 'production',
    optimization: {
      minimizer: [
        COMMON_UGLIFY_CONFIG
      ],
    }
  };
  
  module.exports = { commonConf };
  
new_contents: /* ==========================================================================
     Settings for webpack JavaScript bundling system.
     ========================================================================== */
  
  const BROWSER_LIST = require( './browser-list-config' );
  const webpack = require( 'webpack' );
  const TerserPlugin = require( 'terser-webpack-plugin' );
  
  /* Commmon webpack 'module' option used in each configuration.
     Runs code through Babel and uses global supported browser list. */
  const COMMON_MODULE_CONFIG = {
    rules: [ {
      use: {
        loader: 'babel-loader?cacheDirectory=true',
        options: {
          presets: [ [ '@babel/preset-env', {
            targets: {
              browsers: BROWSER_LIST.LAST_2_PLUS_IE_9_AND_UP
            },
            debug: false
          } ] ]
        }
      }
    } ]
  };
  
  /* Set warnings to true to show linter-style warnings.
     Set mangle to false and beautify to true to debug the output code. */
  const COMMON_MINIFICATION_CONFIG = new TerserPlugin( {
    cache: true,
    parallel: true,
    terserOptions: {
      ie8: false,
      ecma: 5,
      warnings: true,
      mangle: true,
      output: {
        comments: false,
        beautify: false
      }
    }
  } );
  
  const commonConf = {
    cache: true,
    module: COMMON_MODULE_CONFIG,
    mode: 'production',
    optimization: {
      minimizer: [
        COMMON_MINIFICATION_CONFIG
      ],
    }
  };
  
  module.exports = { commonConf };
  
subject: Change minification config variable name