Open-source alternatives to Lazyload

Lightweight JavaScript module system.

RequireJS is a JavaScript module loader and dependency manager that implements the Asynchronous Module Definition API. It enables the asynchronous loading of JavaScript files in the browser to prevent page rendering blocks and manages interdependent scripts to avoid global namespace pollution and execution order issues. The project includes a build optimizer that combines and minifies multiple script files into single bundles to reduce network requests. It also provides a mechanism for version management, allowing multiple versions of the same library to coexist on a single page without confl

Rollup is an ES module bundler and JavaScript module transpiler. It functions as a build tool that combines JavaScript modules into optimized files and converts modern JavaScript and JSX into various output formats for different runtime environments. The project is distinguished by its static-analysis tree shaking engine, which removes unused code and dead exports to minimize bundle size. It also acts as a code splitting orchestrator, partitioning modules into separate chunks to optimize network requests and load times. The tool provides a hook-based plugin system for extending build logic,

SeaJS is a client-side JavaScript module loader and dependency manager. It provides a system for resolving and loading isolated JavaScript files as modules, ensuring that internal and external code requirements are met before execution. The project distinguishes itself as a pluggable asset loader, utilizing a plugin system to load and integrate non-JavaScript assets, such as stylesheets and text files, directly into the module workflow. The system handles frontend dependency resolution through dependency-graph tracking and dynamic path resolution. It manages code organization via isolated mo

This project is a CommonJS module bundler and resolver designed to combine interdependent JavaScript files into a single script for execution in web browsers. It functions as a Node.js JavaScript bundler that emulates server-side core modules and resolves dependencies to ensure compatibility between server-side logic and browser environments. The system features an extensible bundling pipeline and a browser-side module resolver. It provides a plugin architecture for transforming source code and a source map generator to correlate bundled output back to original files for debugging. The proje

SystemJS is a dynamic dependency manager and universal module loader that resolves and executes JavaScript modules across different browser and server environments. It functions as an import map polyfill, mapping bare module specifiers to absolute URLs to manage dependencies without requiring a build step. The project provides a system for integrating diverse formats, including AMD and global scripts, into a modern ES module workflow. It enables browser module polyfilling for environments that lack native support for ES modules and import maps, and it allows for dynamic runtime hot-reloading

JavaScript模块加载器，基于AMD。迄今为止，对AMD理解最好的实现。