![webpack 4: mode and optimization. webpack adds a mode option. What does… | by Tobias Koppers | webpack | Medium webpack 4: mode and optimization. webpack adds a mode option. What does… | by Tobias Koppers | webpack | Medium](https://miro.medium.com/max/1400/1*RAnStHKrhy6OhxC1DPCmmw.jpeg)
webpack 4: mode and optimization. webpack adds a mode option. What does… | by Tobias Koppers | webpack | Medium
![The 'mode' option has not been set, webpack will fallback to 'production' for this value.Field 'browser' doesn't contain a valid alias configuration - Stack Overflow The 'mode' option has not been set, webpack will fallback to 'production' for this value.Field 'browser' doesn't contain a valid alias configuration - Stack Overflow](https://i.stack.imgur.com/Np7tc.png)
The 'mode' option has not been set, webpack will fallback to 'production' for this value.Field 'browser' doesn't contain a valid alias configuration - Stack Overflow
webpack 5] rebuild is twice as slow comparing to webpack 4 · Issue #12102 · webpack/webpack · GitHub
webpack 5] rebuild is twice as slow comparing to webpack 4 · Issue #12102 · webpack/webpack · GitHub
![Error webpack-dev-server --mode development --open --hot · Issue #4 · bradtraversy/react_webpack_starter · GitHub Error webpack-dev-server --mode development --open --hot · Issue #4 · bradtraversy/react_webpack_starter · GitHub](https://user-images.githubusercontent.com/36364052/43110114-ca00fda6-8f1c-11e8-9d1d-45e836c8e88d.png)