What's Changed

Features

• Timeline Diagram by @ashishjain0512 in https://github.com/mermaid-js/mermaid/pull/4014
• feat: Flowchart layout using elkjs by @knsv in https://github.com/mermaid-js/mermaid/pull/3984
• Layout v3 continued by @knsv in https://github.com/mermaid-js/mermaid/pull/3938
• feat(er): add unique key by @tomperr in https://github.com/mermaid-js/mermaid/pull/3917
• feat: Set svg role to 'graphics-document document' by @weedySeaDragon in https://github.com/mermaid-js/mermaid/pull/3897
• feat: Wait for rendering to finish before taking image snapshots by @sidharthv96 in https://github.com/mermaid-js/mermaid/pull/3995
• feat(er): add multiple key constraints by @tomperr in https://github.com/mermaid-js/mermaid/pull/4030
• Add support for YAML frontmatter in Markdown docs (used for Vitepress config) by @aloisklink in https://github.com/mermaid-js/mermaid/pull/3962
• feat(er): allow leading underscore for attributes name by @tomperr in https://github.com/mermaid-js/mermaid/pull/4033
• Add links to theme listing by @BD103 in https://github.com/mermaid-js/mermaid/pull/3890
• Adding support for parenthesis in the er diagram attribute types. by @mahomedalid in https://github.com/mermaid-js/mermaid/pull/3892
• Support parsing indented mermaid/YAML only from HTML by @aloisklink in https://github.com/mermaid-js/mermaid/pull/3859
• Parse style string and number font size values from configuration inputs by @jonabc in https://github.com/mermaid-js/mermaid/pull/3993
• Mindmaps: differentiate the colors between the root node and the first section #4017 by @knsv in https://github.com/mermaid-js/mermaid/pull/4018
• Add Box support in Sequence Diagrams by @oleveau in https://github.com/mermaid-js/mermaid/pull/3965

Breaking changes

• Mind map and timeline diagrams are lazy loaded by mermaid. In order to use these diagrams you need to use the renderAsync method of rendering. The @mermaid-js/mermaid-mindmap package is deprecated by this.

Documentation

• doc: remove links from atom.io; add note Atom has been archived by @weedySeaDragon in https://github.com/mermaid-js/mermaid/pull/3899
• docs(README.zh-CN): fix book image src by @aloisklink in https://github.com/mermaid-js/mermaid/pull/3920
• docs: fix typo by @Foo-x in https://github.com/mermaid-js/mermaid/pull/3925
• docs: update navbar by @huynhicode in https://github.com/mermaid-js/mermaid/pull/3906
• docs: fix text overflow by @huynhicode in https://github.com/mermaid-js/mermaid/pull/3907
• docs: Remove duplicate example in ER-diagram documentation by @guilhermgonzaga in https://github.com/mermaid-js/mermaid/pull/3964
• Docs: Too many primaryBorderColor field by @LiHowe in https://github.com/mermaid-js/mermaid/pull/3986
• docs(sequenceDiagram): subvert prettification of arrow types by @cakemanny in https://github.com/mermaid-js/mermaid/pull/3988
• Add Swimm to the list of integrations by @Omerr in https://github.com/mermaid-js/mermaid/pull/3936
• Website/homepage updates by @huynhicode in https://github.com/mermaid-js/mermaid/pull/3945
• Update sequenceDiagram.md to include line break by @Odogwudozilla in https://github.com/mermaid-js/mermaid/pull/3960
• Support GitHub Flavored Markdown in markdown documentation by @aloisklink in https://github.com/mermaid-js/mermaid/pull/3954
• Update integrations.md by @Barry1 in https://github.com/mermaid-js/mermaid/pull/4011
• docs(readme): update broken twitter badge by @LeoDog896 in https://github.com/mermaid-js/mermaid/pull/4032
• Update mindmap.md by @GavinPen in https://github.com/mermaid-js/mermaid/pull/4042
• Showcase section to the docs - keepings docs up to date by @Omerr in https://github.com/mermaid-js/mermaid/pull/4055

Bug Fixes

• fix(docs): remove duplicate section by @Joxtacy in https://github.com/mermaid-js/mermaid/pull/3908
• fix: Typescript error in usage by @tommoor in https://github.com/mermaid-js/mermaid/pull/3914
• fix: dev server watch mode by @huynhicode in https://github.com/mermaid-js/mermaid/pull/3904
• fix(er): switch to deterministic UUIDs in ER by @aloisklink in https://github.com/mermaid-js/mermaid/pull/3916
• fixed Composition arrow by @Frank-Mayer in https://github.com/mermaid-js/mermaid/pull/3930
• fix(generic): fix generic type detection by @tomperr in https://github.com/mermaid-js/mermaid/pull/3921
• fix typos accessing techn property in drawC4Shape function by @nekikara in https://github.com/mermaid-js/mermaid/pull/3943
• fix(deps): update dependency dompurify to v2.4.3 by @renovate in https://github.com/mermaid-js/mermaid/pull/3977
• Fix nonstandard syntax by @atmikeguo in https://github.com/mermaid-js/mermaid/pull/3972
• Fix failing tests due to semantic merge conflict by @aloisklink in https://github.com/mermaid-js/mermaid/pull/3985
• fix(deps): update dependency dagre-d3-es to v7.0.6 by @renovate in https://github.com/mermaid-js/mermaid/pull/3996
• fix(#4003): Remove unhandled promises by @sidharthv96 in https://github.com/mermaid-js/mermaid/pull/4004
• Bug/3858 [state] trailing whitespace in ids for named state container by @weedySeaDragon in https://github.com/mermaid-js/mermaid/pull/3902
• fix: moment-mini default exporter by @emersonbottero in https://github.com/mermaid-js/mermaid/pull/4034
• fix(deps): update dependency dagre-d3-es to v7.0.8 by @renovate in https://github.com/mermaid-js/mermaid/pull/4058
• bugfix: add missing d3 curves to flowchart and docs by @natasha-jarus in https://github.com/mermaid-js/mermaid/pull/4038
• Bug/3865 C4Context: $borderColor has no effect by @nekikara in https://github.com/mermaid-js/mermaid/pull/3947
• Mindmaps: Handling rows with only spaces in them (#4012) by @knsv in https://github.com/mermaid-js/mermaid/pull/4013

Chores

• ci: disable checking twitter links by @aloisklink in https://github.com/mermaid-js/mermaid/pull/3973
• chore(deps): update all non-major dependencies (minor) by @renovate in https://github.com/mermaid-js/mermaid/pull/3905
• chore(deps): update pnpm to v7.18.2 by @renovate in https://github.com/mermaid-js/mermaid/pull/3929
• chore(pr): add documentation task in PR template by @tomperr in https://github.com/mermaid-js/mermaid/pull/3935
• (chore) Docs: add tag to produce only a diagram, not code example by @weedySeaDragon in https://github.com/mermaid-js/mermaid/pull/3946
• chore(deps): update all non-major dependencies (minor) by @renovate in https://github.com/mermaid-js/mermaid/pull/3944
• chore(deps): update all non-major dependencies (minor) by @renovate in https://github.com/mermaid-js/mermaid/pull/3997
• chore(deps): update pnpm to v7.25.1 by @renovate in https://github.com/mermaid-js/mermaid/pull/4024
• build(lint): cache prettier on pnpm run lint by @aloisklink in https://github.com/mermaid-js/mermaid/pull/4035
• Cache eslint in pre-commit script (makes git commit 5x faster) by @aloisklink in https://github.com/mermaid-js/mermaid/pull/4057

New Contributors

• @Joxtacy made their first contribution in https://github.com/mermaid-js/mermaid/pull/3908
• @BD103 made their first contribution in https://github.com/mermaid-js/mermaid/pull/3890
• @mahomedalid made their first contribution in https://github.com/mermaid-js/mermaid/pull/3892
• @tomperr made their first contribution in https://github.com/mermaid-js/mermaid/pull/3917
• @Foo-x made their first contribution in https://github.com/mermaid-js/mermaid/pull/3925
• @Frank-Mayer made their first contribution in https://github.com/mermaid-js/mermaid/pull/3930
• @Omerr made their first contribution in https://github.com/mermaid-js/mermaid/pull/3936
• @nekikara made their first contribution in https://github.com/mermaid-js/mermaid/pull/3943
• @guilhermgonzaga made their first contribution in https://github.com/mermaid-js/mermaid/pull/3964
• @Odogwudozilla made their first contribution in https://github.com/mermaid-js/mermaid/pull/3960
• @atmikeguo made their first contribution in https://github.com/mermaid-js/mermaid/pull/3972
• @LiHowe made their first contribution in https://github.com/mermaid-js/mermaid/pull/3986
• @cakemanny made their first contribution in https://github.com/mermaid-js/mermaid/pull/3988
• @jonabc made their first contribution in https://github.com/mermaid-js/mermaid/pull/3993
• @MermaidChart made their first contribution in https://github.com/mermaid-js/mermaid/pull/4013
• @Barry1 made their first contribution in https://github.com/mermaid-js/mermaid/pull/4011
• @LeoDog896 made their first contribution in https://github.com/mermaid-js/mermaid/pull/4032
• @GavinPen made their first contribution in https://github.com/mermaid-js/mermaid/pull/4042
• @oleveau made their first contribution in https://github.com/mermaid-js/mermaid/pull/3965
• @natasha-jarus made their first contribution in https://github.com/mermaid-js/mermaid/pull/4038

Full Changelog: https://github.com/mermaid-js/mermaid/compare/v9.3.0...v9.4.0