jabr / es-spackle

Light-weight polyfills for EcmaScript 2018+

• ES2018
  • Promise.prototype.finally
• ES2019
  • Array.prototype.flat
  • Array.prototype.flatMap
  • Object.fromEntries
  • String.prototype.trimStart
  • String.prototype.trimEnd
• ES2020
  • globalThis ¹
  • Promise.allSettled
  • String.prototype.matchAll ²
• ES2021
  • Promise.any ³
  • String.prototype.replaceAll
• ES2022
  • Object.hasOwn
  • String.prototype.at
  • Array.prototype.at
  • %TypedArray%.prototype.at ⁴
• ES2023
  • Array.prototype.findLast
  • Array.prototype.findLastIndex
  • %TypedArray%.prototype.findLast ⁴
  • %TypedArray%.prototype.findLastIndex ⁴
• ES2024
  • Promise.withResolvers
  • Object.groupBy
  • Map.groupBy
• ES2025
  • Set.prototype.intersection
  • Set.prototype.union
  • Set.prototype.difference
  • Set.prototype.symmetricDifference
  • Set.prototype.isSubsetOf
  • Set.prototype.isSupersetOf
  • Set.prototype.isDisjointFrom
• ESNext
  • Promise.try
  • Iterator.range ⁵
  • Uint8Array.fromBase64 ⁶
  • Uint8Array.fromHex
  • Uint8Array.prototype.toBase64 ⁶
  • Uint8Array.prototype.toHex
  • RegExp.escape

License

This project is licensed under the terms of the MIT license.

Footnotes

1. Only polyfills for browser environments. ↩

2. Returns an array as an iterable. ↩

3. Throws an Error (not an AggregateError) but it has the aggregate errors property. ↩

4. Polyfills are not yet supported on BigInt typed arrays. ↩ ↩² ↩³

5. Options parameter and inclusive setting are not yet implemented. ↩

6. Options for base64 alphabet and overflow handling are not yet implemented. ↩ ↩²