mermaid-js

mermaid-js/zenuml-core

Render sequence diagrams from text — the @zenuml/core engine behind ZenUML. Try it live.

10 good first / help-wanted issues · TypeScript · last activity Oct 22, 2026

69 stars 17 forks 69 watchers TypeScript MIT License
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10 Open Issues Need Help Last updated: Oct 22, 2026

Open Issues Need Help

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refactor(svg): delete the never-called renderParticipantBottom, the showBottom field and the always-passing starter-at-bottom test 2 days ago
good first issue renderer needs-triage
mermaid-js/zenuml-core
69

Render sequence diagrams from text — the @zenuml/core engine behind ZenUML. Try it live.

TypeScript
refactor(test): share the XSS payload/position fixture between the HTML and SVG renderer specs, and cover every user-text position 3 days ago
good first issue needs-triage
mermaid-js/zenuml-core
69

Render sequence diagrams from text — the @zenuml/core engine behind ZenUML. Try it live.

TypeScript
refactor(test): shared openDiagram / lastContentChange Playwright helpers — 55 inline readiness waits and 48 inline DSL polls across tests/ 3 days ago
good first issue needs-triage
mermaid-js/zenuml-core
69

Render sequence diagrams from text — the @zenuml/core engine behind ZenUML. Try it live.

TypeScript
refactor: share one swallowFollowUps helper between InteractionController and MessageReorderHandle (two drifted copies) 3 days ago
good first issue renderer needs-triage
mermaid-js/zenuml-core
69

Render sequence diagrams from text — the @zenuml/core engine behind ZenUML. Try it live.

TypeScript
refactor: rename DavidEisenstat, Anchor2 and the cloest-ancestor folder after what they do; move the misplaced MessageCollector spec 3 days ago
good first issue needs-triage
mermaid-js/zenuml-core
69

Render sequence diagrams from text — the @zenuml/core engine behind ZenUML. Try it live.

TypeScript
refactor: clear commented-out code and stale Langium-migration comments; drop the dead FACADE_CLASS_BY_NAME shim map 3 days ago
good first issue needs-triage
mermaid-js/zenuml-core
69

Render sequence diagrams from text — the @zenuml/core engine behind ZenUML. Try it live.

TypeScript
docs: rename langium-migration/PAUSED.md — the Langium side-car is live (LSP autocomplete), not paused 3 days ago
documentation good first issue needs-triage
mermaid-js/zenuml-core
69

Render sequence diagrams from text — the @zenuml/core engine behind ZenUML. Try it live.

TypeScript
refactor: build theme-clean-light and theme-neon SVG palettes from DEFAULT_PALETTE instead of copying 13 fallback literals 3 days ago
good first issue styling needs-triage
mermaid-js/zenuml-core
69

Render sequence diagrams from text — the @zenuml/core engine behind ZenUML. Try it live.

TypeScript
refactor: delete dead waitUntil/debounce, move cn out of src/utils.ts, un-export 13 file-local symbols 3 days ago
good first issue needs-triage
mermaid-js/zenuml-core
69

Render sequence diagrams from text — the @zenuml/core engine behind ZenUML. Try it live.

TypeScript
refactor: move duplicated lineTail / indent helpers into StringUtil 3 days ago
good first issue needs-triage
mermaid-js/zenuml-core
69

Render sequence diagrams from text — the @zenuml/core engine behind ZenUML. Try it live.

TypeScript