Grunt vs Just vs Webpack: What are the differences?

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1. **Task Runners vs Module Bundlers**: Grunt and Gulp are task runners, focusing on automating tasks, while Webpack is a module bundler that packages resources like CSS or JavaScript files.
2. **Configuration Over Convention vs Convention Over Configuration**: Grunt and Gulp require explicit configuration, whereas Webpack follows a convention-based approach, reducing the need for configuration.
3. **Parallel vs Sequential Processing**: Grunt and Gulp perform tasks in a sequential manner, while Webpack can process tasks in parallel, improving build times.
4. **Ease of Use**: Grunt is known for its steep learning curve due to the extensive configuration required, Gulp is more approachable with its code-over-configuration approach, and Webpack offers great flexibility but can be complex for beginners.
5. **Plugin Ecosystem**: Grunt and Gulp have a wide array of plugins available for different tasks, while Webpack has a more focused plugin ecosystem for specific Webpack-related functionalities.
6. **Code Splitting and Tree Shaking**: Webpack excels in code splitting, allowing for smaller bundles and faster load times, as well as tree shaking to eliminate unused code, optimizing the bundle size further.

In Summary, Grunt, Gulp, and Webpack differ in their approach to automation, configuration, processing, ease of use, plugin ecosystem, and optimization techniques.