jscorlib

a set of JS helpers inspired by .NET BCL, TC 39 drafts, and more, which hopefully reduces repetitive work by filling the gaps in the native JavaScript API.

This is the entry-point package of the jscorlib library.

This package is an ESM package that has been transpiled with ES2022 language target. Please transpile the JS files once more and/or apply polyfills as your compatibility need, if you are the end-user of the package.

This package is tree-shakable.

This package contains core functionalities that extends JS API for a bit, including

• helpers for built-in JS types, such as string / Array / Number / Promise
• abstrations of comparers & equality comparers
• Lazy & AsyncLazy containers
• debug-time assertion, object ID, customizable inspection message
• strong-typed common Error sub-classes
• EventEmitter supporting synchronous & asynchronous handlers
• basic globalization conventions (e.g. invariant locale)
• strong-typed HttpRequestError, and a factory function that takes Response as input
• LINQ-like chainable "Fluent" syntax for querying over any Iterable
• an asynchronous Semaphore that has been long existing in native languages, which does not make any sense in JS until asynchronous functions are introduced
• a very simple runtime type system based on typeof operator and object "prototype holders"

For details, please refer to the API documentation of the package.