Sourced from core-js's changelog.

3.45.1 - 2025.08.20

• Changes v3.45.0...v3.45.1 (30 commits)
• Fixed a conflict of native methods from Map upsert proposal with polyfilled methods in the pure version
• Added bugs fields to package.json of all packages
• Compat data improvements:
  • Map upsert proposal features marked as shipped from Bun 1.2.20
  • Added Samsung Internet 29 compat data mapping
  • Added Electron 39 compat data mapping

3.45.0 - 2025.08.04

• Changes v3.44.0...v3.45.0 (70 commits)
• Uint8Array to / from base64 and hex proposal:
  • Built-ins:
    • Uint8Array.fromBase64
    • Uint8Array.fromHex
    • Uint8Array.prototype.setFromBase64
    • Uint8Array.prototype.setFromHex
    • Uint8Array.prototype.toBase64
    • Uint8Array.prototype.toHex
  • Moved to stable ES, July 2025 TC39 meeting
  • Added es. namespace modules, /es/ and /stable/ namespaces entries
  • Added detection of a Webkit bug: Uint8Array fromBase64 / setFromBase64 does not throw an error on incorrect length of base64 string
• Math.sumPrecise proposal:
  • Built-ins:
    • Math.sumPrecise
  • Moved to stable ES, July 2025 TC39 meeting
  • Added es. namespace module, /es/ and /stable/ namespaces entries
• Iterator sequencing proposal:
  • Built-ins:
    • Iterator.concat
  • Moved to stage 3, July 2025 TC39 meeting
  • Added /actual/ namespace entries, unconditional forced replacement changed to feature detection
• Map upsert proposal:
  • Built-ins:
    • Map.prototype.getOrInsert
    • Map.prototype.getOrInsertComputed
    • WeakMap.prototype.getOrInsert
    • WeakMap.prototype.getOrInsertComputed
  • Moved to stage 3, July 2025 TC39 meeting
  • Added /actual/ namespace entries, unconditional forced replacement changed to feature detection
• Added missing dependencies to some entries of static Iterator methods
• Fixed Joint Iteration proposal in /stage/ entries
• Compat data improvements:
  • Uint8Array to / from base64 and hex proposal features marked as supported from V8 ~ Chromium 140
  • Uint8Array.{ fromBase64, prototype.setFromBase64 } marked as unsupported in Safari and supported only from Bun 1.2.20 because of a bug: it does not throw an error on incorrect length of base64 string
  • %TypedArray%.prototype.with marked as fixed in Safari 26.0
  • Updated Electron 38 compat data mapping
  • Added Opera Android 91 compat data mapping

• a16b86a v3.45.1
• 4f9ac04 fix a conflict of native methods from Map upsert proposal with polyfilled m...
• 149c2f1 update some examples
• 836cbec bump the year
• d4fa8f0 enforce bugs field in package.json of public packages
• 79bf819 v3.45.0
• e118594 move Map upsert to stage 3
• d8e524c move iterator sequencing proposal to stage 3
• 8c0bd93 move Uint8Array to / from base64 and hex to stable ES
• 0f1a2d5 move Math.sumPrecise to stable ES
• Additional commits viewable in compare view

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