ECMAScript 5 compatibility shims for legacy (and modern) JavaScript engines
es5-shim is a JavaScript polyfill library that monkey-patches legacy and modern JavaScript engines to provide ECMAScript 5 compatibility. It consists of two main components: es5-shim.js, which implements ES5 methods that can be faithfully emulated, and es5-sham.js, which provides approximate implementations of ES5 methods that cannot be fully replicated in older engines. The library uses the Jasmine testing framework and covers a wide range of ES5 features including Array methods, Object utilities, String and Number prototypes, Date functionality, and error handling.