presets Archives | JS FAQ - JavaScript Guides Online

Optimize Babel configurations with the useBuiltIns option in @babel/preset-env to manage polyfills effectively. Choose between entry and usage modes to reduce bundle size. Combine presets and plugins for enhanced functionality, and leverage caching to improve build times. Tailor settings for monorepos using overrides for efficiency.

Transpilers: Babel

How to set up Babel with package.json

Transpilers: Babelbabel, config, json, presets

Configuring Babel in your package.json streamlines project management by centralizing settings. Adding a "babel" key allows you to specify presets like @babel/preset-env, targeting modern browsers while optimizing bundle size. Options such as useBuiltIns and corejs enhance performance. Ideal for small to medium projects, this method simplifies the build process.

Code Quality: ESLint/Prettier

How to extend ESLint configurations

Code Quality: ESLint/Prettierconfig, eslint, extend, presets

Creating custom ESLint configurations involves assessing project-specific needs and establishing tailored rules. Key elements include defining the environment, using the `overrides` property for different file types, and integrating plugins for enhanced functionality. Documenting rules fosters collaboration and maintains code quality across diverse codebases.

Transpilers: Babel

How to configure .babelrc file

Transpilers: Babelbabel, config, presets, rc

Optimizing .babelrc plugin settings improves transpilation efficiency and build performance. Key strategies include selecting necessary plugins, grouping related ones, ordering plugins correctly, leveraging caching, ignoring unnecessary files, and applying environment-specific plugins to maintain lean and effective Babel configurations.