A lightweight (~2kB) JavaScript module system for organizing code with dependency resolution, similar to RequireJS.
modulejs is a lightweight JavaScript module system that helps organize code into reusable modules with dependency resolution. It solves the problem of managing dependencies in browser-based JavaScript applications without requiring a complex module loader or build system. Unlike full module loaders, it doesn't handle file loading—it focuses purely on dependency injection and module lifecycle management.
JavaScript developers building browser applications who need a simple, lightweight alternative to heavier module systems like RequireJS or Webpack for dependency management.
Developers choose modulejs for its minimal footprint (~2kB) and straightforward API that mirrors familiar patterns from RequireJS. It provides dependency resolution and module organization without the complexity and overhead of full bundlers or loaders.
Lightweight JavaScript module system.
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At ~2kB minified, modulejs adds almost no overhead, making it ideal for performance-conscious projects where bundle size is critical, as highlighted in the README.
Modules automatically resolve and inject dependencies before instantiation, simplifying code organization and ensuring proper load order without manual intervention.
The API mirrors RequireJS, reducing the learning curve for developers already experienced with AMD patterns, as noted in the features.
Supports mock dependency injection via modulejs.require(id, mocks), enabling straightforward unit testing without external libraries, as demonstrated in the API examples.
Utilities like modulejs.state() and modulejs.log() provide clear visibility into module dependencies and instantiation status, aiding in debugging and dependency tree analysis.
Does not handle script loading or HTTP requests, forcing developers to manually include scripts or use separate loaders, which complicates setup and limits use cases for dynamic loading.
Third-party objects like jQuery must be wrapped in functions when defining modules, adding boilerplate and potential for errors, as cautioned in the README examples.
All module resolution is synchronous, with no native support for dynamic imports or lazy loading, limiting scalability for applications requiring async module loading.
As a minimal library, it lacks the extensive plugin systems, community support, and integration tools found in mainstream bundlers, making it harder for complex project setups.
modulejs is an open-source alternative to the following products: