title: Ignore Typescript errors in Webpack-dev-server
body: <p>I have inherited an angular+Typescript project. The dev environment used gulp's webserver and I am trying to switch over to webpack-dev-server so that we can enable hot-module-replacement.</p>
  
  <p>When I run webpack-dev-server from our build/ directory, the command fails, listing about 700 TypeScript errors. We would rather not fix them. Is there any way to use webpack-dev-server even with TypeScript errors?</p>
  
  <p>My understanding was that webpack should still correctly create the build file and start the dev-server even if typescript errors occur, unless you enable the webpack-fail-plugin, which I do not have enabled.</p>
  
  <p>Here is my current webpack.config.js file:</p>
  
  <pre><code>'use strict';
  var webpack = require('webpack');
  var CompressionPlugin = require("compression-webpack-plugin");
  
  var config = {
      entry: {
          build:  './app/core/bootstrap.ts',
          //adminbuild: './app/core/adminbootstrap.ts',
          //report: './app/core/reportbootstrap.ts',
          vendor: ["angular", "angular-material"]
      },
  
      output: {
          path: __dirname + '/build',
          publicPath: '',
          filename: '[name].bundle.js'
      },
  
      devtool: 'source-map',
  
      resolve: {
          extensions: ['', '.webpack.js', '.web.js', '.ts', '.js', '.json', '.jsx', '.js']
      },
  
      module: {
          preloaders: [
             /* {
                  test: /\.ts$/,
                  loader: 'tslint'
              }*/
          ],
  
          loaders: [
          ...
              {
                  test: /\.ts$/,
                  loader: 'ts'
              },
          ...
          ],
      },
  };
  
  module.exports = config;
  </code></pre>