Immutable Built-ins

Dependency-free collection of immutable replacements for JavaScript builtins

Installation

yarn add immutable-builtins

Example Usage

import { ImmutableDate } from 'immutable-builtins';

const d1 = new ImmutableDate();
const d2 = new ImmutableDate(d1.toMutable().setFullYear(0));

// TypeScript error: "Property 'setFullYear' does not exist on type 'ImmutableDate'";
// Runtime/JavaScript error: "Cannot use a mutating method on an ImmutableDate instance"
d1.setFullYear(0);

Contributing

Issues and PRs welcome!

License

MIT