# MobX 6.4.1

- Product: MobX (https://whatsnew.fyi/product/mobx)
- Vendor: MobX
- Date: 2022-02-19
- Version: 6.4.1
- Original notes: https://github.com/mobxjs/mobx/releases/tag/mobx%406.4.1
- Permalink: https://whatsnew.fyi/product/mobx/releases/6.4.1

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Fix missing type inference of observe and intercept for arrays

###### Patch Changes

-   [`d6fa9a19`](https://github.com/mobxjs/mobx/commit/d6fa9a1970ebfb8a8adaf5bf0dc73125acec2dee) [#3306](https://github.com/mobxjs/mobx/pull/3306) Thanks [@urugator](https://github.com/urugator)! - fix missing type inferrence of `observe` and `intercept` for arrays