Es5 Shim

es5-shim is an ECMAScript 5 polyfill library and standard library shim. It serves as a JavaScript compatibility layer that adds missing ES5 standard library methods and language features to legacy JavaScript engines.

The project functions by implementing the ECMAScript 5 specification for non-compliant engines to ensure consistent behavior and prevent runtime errors. It provides a bridge for older browser environments, allowing modern JavaScript code to execute in legacy environments.

The library covers cross-browser API standardization and polyfill management. It specifically handles the emulation of standard language methods, object manipulation, and the restoration of missing features across different versions of JavaScript engines.

Features

Standard Library Polyfills - Implements missing standard library methods and constructors specifically for the ECMAScript 5 specification.

JavaScript Runtime Compatibility Layers - Provides a compatibility layer of polyfills and shims to ensure consistent JavaScript standard library behavior.

Standard Library Compatibility Shims - Implements a collection of global functions and prototype methods that emulate the ECMAScript 5 specification.

Language Method Emulations - Injects standard language methods into the global environment to ensure modern code runs on legacy engines.

Legacy Runtime Compatibility - Adds missing language features to legacy engines so modern JavaScript code can run in older environments.

ECMAScript Behavior Emulators - Adds missing language features to old engines to ensure consistent behavior across different browser versions.

Global - Injects missing standard library functions into the global runtime environment for universal access across the application.

Prototype Extensions - Extends core JavaScript functionality by adding missing standard methods directly to internal object prototypes.

Legacy Browser Support - Provides essential language shims to maintain functionality and prevent errors in outdated web browsers.

Cross-Browser API Standardizations - Ensures consistent behavior of global functions and object prototypes across different versions of JavaScript engines.

Feature Detection Polyfills - Implements runtime utilities that detect existing browser capabilities before applying necessary ES5 polyfills.

Core Object Method Polyfills - Provides polyfills for standard methods on global constructors like Object and Array.

Legacy Browser Polyfills - Provides technical shims and API functionality to legacy browser environments to prevent runtime crashes.

Standards-Compliant Implementations - Replicates the exact behavior and signatures of official ECMAScript specifications for consistent cross-browser execution.

Object Property Accessors - Provides polyfills for object creation and property management in engines lacking native support.

Runtime Crash Preventions - Provides basic functional stubs for complex methods to prevent runtime errors in extremely old JavaScript engines.

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Features

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