react/metro

Features

• React Native Bundlers - Packages JavaScript code and assets into single bundles optimized for execution within React Native applications.
• JavaScript Bundling Workflows - Resolves dependencies from a root file to create a packaged JavaScript bundle with minification and platform targeting.
• Bundled Asset Serving - Serves generated JavaScript bundles and assets via a local HTTP server for rapid development deployment.
• Development Bundler Servers - Runs a local HTTP server to handle requests for bundles and assets during active development.
• Module Dependency Graphs - Traverses import trees to build a complete directed graph of required modules and assets.
• Module Resolution - Defines how the bundler locates files using source extensions, package entry fields, and custom algorithms.
• Module Resolvers - Provides a configurable lookup engine that resolves file paths and package entry fields based on a root file.
• Source Code Transformation Engines - Converts source code into intermediate tree structures through a pluggable transformation pipeline before bundling.
• JavaScript Source Transformers - Provides a transformation pipeline that converts source code into tree structures for optimization and minification.
• React Native - Functions as a specialized bundler that resolves dependencies and packages code specifically for React Native environments.
• Build Caches - Uses storage adapters to persist processed modules on disk to prevent redundant work across build cycles.
• Programmatic Bundle APIs - Provides a promise-based programmatic interface to generate bundles, source maps, and assets for build automation.
• Development Servers - Ships a local server providing hot module replacement to accelerate frontend and application iteration.
• Asynchronous Bundle Pipelines - Executes the bundling process as an asynchronous pipeline returning the final assets and source maps.
• Source Map Generators - Generates mapping files to correlate transformed production code back to the original source for debugging.
• Platform-Specific Source Resolution - Automatically selects source files by matching platform-specific extensions during the module discovery phase.
• Development Workflow Tools - Runs a local development server to deliver bundles and assets to mobile devices during active coding.
• Persistent Module Caches - Persists processed module outputs and symbol tables on disk to avoid redundant transformations across build cycles.
• Platform-Suffix Asset Resolution - Retrieves correct file paths for assets based on platform suffixes or resolution requirements.
• Pluggable Compiler Integrations - Allows replacing the default compiler or minifier to customize source code processing and optimization.
• Source Directory Configuration - Controls which folders are scanned for source files and excludes paths using regular expressions.
• Build Automation Pipelines - Programmatically generates bundles and source maps to integrate into automated deployment or build pipelines.

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