# Mermaid 11.8.0

- Product: Mermaid (https://whatsnew.fyi/product/mermaid)
- Vendor: Mermaid
- Date: 2025-07-03
- Version: 11.8.0
- Original notes: https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.8.0
- Permalink: https://whatsnew.fyi/product/mermaid/releases/11.8.0

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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- **added** — Support for the new nested treemap diagram type
- **fixed** — Log a warning when duplicate commit IDs are encountered in gitGraph to help identify and debug rendering issues caused by non-unique IDs

###### Minor Changes

-   [#6590](https://github.com/mermaid-js/mermaid/pull/6590) [`f338802`](https://github.com/mermaid-js/mermaid/commit/f338802642cdecf5b7ed6c19a20cf2a81effbbee) Thanks [@knsv](https://github.com/knsv)! - Adding support for the new diagram type nested treemap

###### Patch Changes

-   [#6707](https://github.com/mermaid-js/mermaid/pull/6707) [`592c5bb`](https://github.com/mermaid-js/mermaid/commit/592c5bb880c3b942710a2878d386bcb3eb35c137) Thanks [@darshanr0107](https://github.com/darshanr0107)! - fix: Log a warning when duplicate commit IDs are encountered in gitGraph to help identify and debug rendering issues caused by non-unique IDs.

-   Updated dependencies \[[`f338802`](https://github.com/mermaid-js/mermaid/commit/f338802642cdecf5b7ed6c19a20cf2a81effbbee)]:
    -   @mermaid-js/parser@0.6.0