standard-things/esmArchived
Esm
esm is an ECMAScript module loader and JavaScript module path resolver. It functions as a runtime system that executes standard JavaScript modules without requiring a separate build or bundling process.
The project provides a compatibility bridge for CommonJS interoperability, wrapping CommonJS exports into synthetic modules to allow imports and exports between different module systems. It includes a dynamic module cache that stores resolved instances in memory to prevent redundant file system reads and repeated execution.
The system handles runtime path resolution and file extension detection. Module behavior, path resolution rules, and caching can be adjusted through environment variables or configuration files.
Features
- Dynamic Module Loaders - Functions as a runtime system that fetches and executes ECMAScript modules without requiring a build or bundling step.
- Module Resolution - Provides the core logic and configuration for mapping module identifiers to specific file paths during runtime execution.
- Universal Module Wrapping - Wraps CommonJS exports into synthetic ECMAScript modules to enable seamless interoperability between different module systems.
- ECMAScript Module Support - Functions as a runtime system that executes standard ECMAScript modules without the need for a build or bundling process.
- CommonJS Interop - Provides a compatibility layer that resolves and standardizes legacy CommonJS module imports within an ECMAScript module environment.
- CommonJS Module Loaders - Implements the loading and caching mechanisms necessary to interoperate with CommonJS modules in an ESM environment.
- CommonJS-ESM Interoperability - Bridges different JavaScript module systems to allow seamless imports and exports between CommonJS and ESM.
- CommonJS Module Loaders - Facilitates the exchange of code and data between different module systems using consistent import and export rules.
- Runtime - Determines target file paths by applying configurable search rules to import specifiers during runtime.
- CommonJS Compatibility - Implements a compatibility layer that wraps CommonJS exports to allow them to be executed in modern JavaScript environments.
- Runtime Path Resolvers - Determines target file paths and resolves module extensions dynamically during the execution of the program.
- Resolved Module Caches - Stores resolved module instances in memory to eliminate redundant file system reads and repeated code execution.
- Module Instance Caches - Implements a dynamic memory map to store resolved modules, preventing redundant file system access and repeated execution.
- Lazy Module Compilation - Implements deferred loading of modules, ensuring parsing and execution only occur upon explicit request.
- Module Behavior Configurations - Provides configuration options to control path resolution, caching, and extension recognition behavior.
- JavaScript - Includes a dynamic memory map that stores resolved module instances to prevent redundant file system reads and repeated execution.
- Lazy Loading - Defers the parsing and execution of a module until it is explicitly required by an import statement.
- Runtime Module Caching - Stores resolved module instances in memory to prevent redundant file system reads and repeated execution.
- Environment Variable-Based Configuration - Adjusts module loading and path resolution rules using system environment variables at application startup.
- Environment-Driven Feature Configurations - Allows module loading and path resolution behavior to be configured via system environment variables at startup.
