Add config option for watch polling.

template/build/dev-server.js

@@ -28,7 +28,11 @@ const compiler = webpack(webpackConfig)
 
 const devMiddleware = require('webpack-dev-middleware')(compiler, {
  publicPath: webpackConfig.output.publicPath,
- quiet: true
+ quiet: true,
+ watchOptions: !config.dev.poll ? undefined : {
+ aggregateTimeout: 300,
+ poll: true,
+ }
 })
 
 const hotMiddleware = require('webpack-hot-middleware')(compiler, {

template/config/index.js

@@ -20,7 +20,7 @@ module.exports = {
  // View the bundle analyzer report after build finishes:
  // `npm run build --report`
  // Set to `true` or `false` to always turn it on or off
- bundleAnalyzerReport: process.env.npm_config_report
+ bundleAnalyzerReport: process.env.npm_config_report,
  },
  dev: {
  env: require('./dev.env'),
@@ -34,6 +34,11 @@ module.exports = {
  // (https://github.com/webpack/css-loader#sourcemaps)
  // In our experience, they generally work as expected,
  // just be aware of this issue when enabling this option.
- cssSourceMap: false
+ cssSourceMap: false,
+ // In some environments (e.g. Folders in dropbox or similar services)
+ // Webpack's file watcher doesn't work correctly in its default mode,
+ // and consequently, HMR doesn't work as well.
+ // Switching to 'poll' mode solves this for a lot of scenarios.
+ poll: false
  }
 }