webpack.dev.config.ts

// Copyright 2019 The Oppia Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/**
 * @fileoverview Development environment config file for Webpack.
 */

const {merge} = require('webpack-merge');
const common = require('./webpack.common.config.ts');
var path = require('path');

module.exports = merge(common, {
  mode: 'development',
  output: {
    filename: '[name].bundle.js',
    path: path.resolve(__dirname, 'webpack_bundles'),
    publicPath: '/webpack_bundles/',
  },
  devtool: 'eval',
  watchOptions: {
    aggregateTimeout: 500,
    poll: 1000,
  },
  stats: {
    warningsFilter: [
      /export '.*' was not found in/,
      /export .* was not found in/,
      (warning: string) => {
        const targetModules = [
          'delete-account-page.module.ts',
          'core/templates/pages/oppia-root/index.ts',
          'core/templates/pages/lightweight-oppia-root/index.ts',
        ];
        const targetErrors = [
          'the request of a dependency is an expression',
          'System.import() is deprecated',
        ];
        const matchesModule = targetModules.some(mod => warning.includes(mod));
        const matchesError = targetErrors.some(err => warning.includes(err));

        return matchesModule && matchesError;
      },
    ],
  },
});