Announcement
core-js - Modular JavaScript Standard Library Polyfill
core-js is a popular and widely used polyfill for the JavaScript standard library, supporting the latest ECMAScript standards and various JavaScript proposals. It ensures compatibility across different environments, including older browsers.
Project Introduction
Summary
core-js provides polyfills for virtually all standard library features introduced in ECMAScript 2015 and later, as well as proposals. It aims to make modern JavaScript usable everywhere.
Problem Solved
The problem is the inconsistency of JavaScript environments. New features in the standard library are often not available in older browsers or Node.js versions. core-js bridges this gap by providing implementations of these features.
Core Features
Comprehensive Polyfills
Provides polyfills for a wide range of features including Promises, Symbols, Iterators, Collections (Map, Set, WeakMap, WeakSet), Typed Arrays, and many more from ES6 to the latest proposals.
Modular Design
Allows developers to import only the specific polyfills needed, reducing bundle size and improving performance.
Tech Stack
使用场景
This project is widely used in scenarios requiring consistent JavaScript standard library behavior across diverse environments, especially targeting older browsers or specific runtime versions.
场景一：Supporting Older Browsers
Details
Ensuring web applications built with modern JavaScript features (like Promises, async/await via generators/runtime) work correctly in Internet Explorer or older versions of Chrome/Firefox/Safari.
User Value
Increases application reach and user base by maintaining compatibility.
场景二：Building Libraries/Frameworks
Details
Authors of libraries or frameworks can use core-js to ensure their code relies on standard features without worrying about the host environment's native support.
User Value
Simplifies library development and guarantees predictable behavior for users regardless of their setup.
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