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SystemJS is a hookable, standards-based module loader. It provides a workflow where code written for production workflows of native ES modules in browsers (like Rollup code-splitting builds), can be transpiled to the System.register module format to work in older browsers that don't support native modules, running almost-native module speeds while supporting top-level await, dynamic import, circular references and live bindings, import.meta.url, module types, import maps, integrity and Content Security Policy with compatibility in older browsers back to IE11. SystemJS allows to write and use modular javacsript code that relies on ECMAScript 6 import and export statements. One good example is moment.js library, which started publishing ECMAScript 6 source code on npm since 2.10.0 release of moment.js. SystemJS requries a transpiler to compile ECMAScript 6 javacsript into a code that could be run in current versions of browsers and node.js.
Features
- SystemJS allows to write and use modular javacsript code that relies on ECMAScript 6 import and export statements
- Loads System.register modules, the CSP-compatible SystemJS module format
- Support for loading bare specifier names with import maps via <script type="systemjs-importmap">
- Supports hooks for loader customization
- Tracing hooks and registry deletion API for reloading workflows
- Supports loading Wasm, CSS and JSON module types
Project Samples
