# What changed in intl-messageformat

> 1 change in intl-messageformat 12 from its official release notes, upgrade guides and advisories. Each one cited. Sources checked 2026-10-24. HTML: https://unstale.sh/npm/intl-messageformat/

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## intl-messageformat 12

### Fixes and other changes

- The parser tolerates MicrosoftAjax startsWith overrides, preventing failures in environments where MicrosoftAjax replaces startsWith. (12.1.3) — [release notes](https://github.com/formatjs/formatjs/releases/tag/intl-messageformat%4012.1.3)