Owner

mermaid-js

5 indexed repositories · View on GitHub

mermaid
Generation of diagrams like flowcharts or sequence diagrams from text in a similar manner as markdown

TypeScript · 90311 stars
mermaid-live-editor
Edit, preview and share mermaid charts/diagrams. New implementation of the live editor.

TypeScript · 6813 stars
mermaid-cli
Command line tool for the Mermaid library

JavaScript · 5017 stars
react-wrapper

13 stars
mermaid-js.github.io

HTML · 2 stars

Beginner friendly Everything

Open All

Broken linkфывыф Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 15/100

mermaid-js/mermaid-live-editor#2038 · Opened Sep 18, 2026
Análisis normativo y jerarquía de las normas aplicables a las instalaciones eléctricas en BT en el Perú Open

Status: Triage Type: Enhancement Type: New Diagram

Difficulty 5/5 Over a week Newbie friendliness 20/100

mermaid-js/mermaid#8272 · Opened Sep 17, 2026
Docker image EXPOSEs port 80, but nginx actually listens on 8080 Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 55/100

mermaid-js/mermaid-live-editor#2037 · Opened Sep 17, 2026
Empty comment lines break parsing Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

mermaid-js/mermaid-live-editor#2036 · Opened Sep 16, 2026
Can these commented-out code lines be deleted? Open

Status: Triage

Difficulty 1/5 Under an hour Newbie friendliness 85/100

mermaid-js/mermaid#8266 · Opened Sep 15, 2026
Enhancement: Better error message for exceeding maxEdges Open

Status: Approved Type: Enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

mermaid-js/mermaid#8262 · 1 comment · Opened Sep 14, 2026
Update README with Agent-Friendly Score badge Open

Area: Documentation Human Review Status: Triage

Difficulty 1/5 Under an hour Newbie friendliness 85/100

mermaid-js/mermaid#8218 · Opened Sep 5, 2026
Sequence diagram: long labels in the database actors rendering without padding Open

Graph: Sequence Type: Bug / Error

mermaid-js/mermaid#8215 · 1 comment · 1 assignee · Opened Sep 4, 2026
feat(GitGraph): Add option to reuse branch lanes if there are no commits after a branch is merged and has no new commits Open

Status: Triage Type: Enhancement

Difficulty 4/5 3-5 days Newbie friendliness 58/100

mermaid-js/mermaid#8208 · 1 comment · Opened Sep 3, 2026
Customer Journey Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

mermaid-js/mermaid-live-editor#2028 · Opened Sep 3, 2026
fix(treemap): trailing whitespace after leaf value causes parse error Open

Status: Triage

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

mermaid-js/mermaid#8205 · 1 comment · Opened Sep 3, 2026
[Flowchart] Rendering fails when an edge targets a subgraph ID Open

Status: Triage Type: Bug / Error

Difficulty 3/5 1-2 days Newbie friendliness 68/100

mermaid-js/mermaid#8202 · Opened Sep 2, 2026
frontMatterRegex is polynomial on whitespace-heavy input (ReDoS, CodeQL js/polynomial-redos) Open

Status: Triage

Difficulty 5/5 Over a week Newbie friendliness 45/100

mermaid-js/mermaid#8200 · Opened Sep 1, 2026
Unify comment stripping: detectType's anyCommentRegex vs preprocessDiagram's cleanupComments Open

Status: Triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mermaid-js/mermaid#8196 · Opened Sep 1, 2026
defaultConfig.class silently drops seven schema defaults Open

Status: Triage

Difficulty 5/5 Over a week Newbie friendliness 35/100

mermaid-js/mermaid#8195 · Opened Sep 1, 2026
Gantt: a task line with four or more metadata items throws an internal TypeError instead of reporting a parse error Open

Status: Triage Type: Bug / Error

Difficulty 3/5 1-2 days Newbie friendliness 72/100

mermaid-js/mermaid#8188 · Opened Aug 31, 2026
Waveform Diagram Support Open

Status: Triage Type: Enhancement Type: New Diagram

Difficulty 5/5 Over a week Newbie friendliness 30/100

mermaid-js/mermaid#8187 · Opened Aug 31, 2026
Palette theme variables are interpolated into CSS without validation Open

Status: Triage

Difficulty 4/5 3-5 days Newbie friendliness 72/100

mermaid-js/mermaid#8184 · 1 comment · Opened Aug 31, 2026
Colour the use case diagram by role, with numbered system boundaries Open

Status: Triage Type: Enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mermaid-js/mermaid#8175 · 1 comment · Opened Aug 31, 2026
ELK: `elk.cycleBreakingStrategy` is silently stripped from frontmatter/init config — missing from `defaultConfig.elk` Open

Status: Triage

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

mermaid-js/mermaid#8172 · 1 comment · Opened Aug 30, 2026
Logos not working in architecture diagram Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

mermaid-js/mermaid-live-editor#2026 · Opened Aug 30, 2026
Several theme variables across multiple diagram types are dropped by frontmatter sanitization Open

Status: Triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mermaid-js/mermaid#8170 · 1 comment · Opened Aug 29, 2026
BPMN 2.0: bpmn-beta - PR series tracker Open

Status: Triage

mermaid-js/mermaid#8160 · 20 comments · 1 assignee · Opened Aug 29, 2026
Unify per-diagram-type default layout selection Open

Status: Triage

Difficulty 5/5 Over a week Newbie friendliness 42/100

mermaid-js/mermaid#8159 · 1 comment · Opened Aug 28, 2026
Contrast issues in dark mode when rectangles with background colours are used Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 65/100

mermaid-js/mermaid-live-editor#2024 · 1 comment · Opened Aug 28, 2026
xychart-beta: a line series with one data point renders an empty plot, because the path is a zero-length subpath and no point marker is drawn Open

Status: Triage Type: Bug / Error

Difficulty 3/5 1-2 days Newbie friendliness 70/100

mermaid-js/mermaid#8153 · Opened Aug 27, 2026
Support Universal Variability Language (UVL) Open

Status: Triage Type: Enhancement Type: New Diagram

Difficulty 5/5 Over a week Newbie friendliness 30/100

mermaid-js/mermaid#8141 · Opened Aug 27, 2026
Browser-specific rendering of Gantt chart Open

Status: Triage Type: Bug / Error

Difficulty 3/5 1-2 days Newbie friendliness 68/100

mermaid-js/mermaid#8136 · 2 comments · Opened Aug 26, 2026
Flowchart parsing is quadratic in token count; a run of whitespace makes it easy to hit Open

Status: Triage Type: Bug / Error

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

mermaid-js/mermaid#8127 · Opened Aug 25, 2026
Restore class name for edges to edgePats fort backwards compatability Open

Status: Triage Type: Bug / Error

mermaid-js/mermaid#8124 · 1 assignee · Opened Aug 25, 2026
Gantt: empty comma field in a task line crashes render with "Cannot read properties of undefined (reading 'type')" Open

Status: Triage

Difficulty 2/5 1-3 hours Newbie friendliness 74/100

mermaid-js/mermaid#8123 · Opened Aug 25, 2026
flowchart: out-of-range linkStyle index throws raw TypeError instead of the intended "index out of bounds" error Open

Status: Triage

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

mermaid-js/mermaid#8122 · Opened Aug 25, 2026
bug(kanban): accTitle and accDescr are unsupported and become columns, leaving boards with no SVG title or description Open

Status: Triage Type: Bug / Error

Difficulty 3/5 1-2 days Newbie friendliness 76/100

mermaid-js/mermaid#8120 · Opened Aug 24, 2026
bug(kanban): `:::` class assignments are parsed and stored but dropped by getData(), so they never render Open

Status: Triage Type: Bug / Error

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

mermaid-js/mermaid#8119 · 1 comment · Opened Aug 24, 2026
bug(kanban): `style` statements are parsed as a column, adding a bogus card holder to the board Open

Status: Triage Type: Bug / Error

Difficulty 4/5 3-5 days Newbie friendliness 45/100

mermaid-js/mermaid#8118 · Opened Aug 24, 2026
feat(kanban): mark a task as complete Open

Status: Triage Type: Enhancement

mermaid-js/mermaid#8117 · 1 assignee · Opened Aug 24, 2026
refactor(kanban): convert the parser to Chevrotain Open

Status: Triage Type: Enhancement

mermaid-js/mermaid#8116 · 2 comments · 1 assignee · Opened Aug 24, 2026
Ancestor CSS transforms mis-size Mermaid labels and detach edges because viewport measurements are used as SVG user units Open

Status: Triage Type: Bug / Error

Difficulty 4/5 3-5 days Newbie friendliness 68/100

mermaid-js/mermaid#8113 · 1 reaction · Opened Aug 23, 2026
classDef/class has no effect on icon-shaped nodes (icon shapes drop node.cssClasses) Open

Status: Triage

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

mermaid-js/mermaid#8107 · 1 comment · Opened Aug 22, 2026
themeCSS cannot declare @font-face for standalone SVG font delivery Open

Status: Triage

Difficulty 3/5 1-2 days Newbie friendliness 58/100

mermaid-js/mermaid#8106 · Opened Aug 21, 2026
themeCSS is silently dropped in full when it contains a > child combinator Open

Status: Triage

Difficulty 3/5 1-2 days Newbie friendliness 68/100

mermaid-js/mermaid#8105 · 2 comments · 1 reaction · Opened Aug 21, 2026
Self-loop inside a subgraph reserves ~2 × rankSpacing of empty space Open

Sponsored by MermaidChart Status: Approved

mermaid-js/mermaid#8080 · 1 assignee · Opened Aug 19, 2026
rendering position of Text Nodes in venn-beta is incorrect Open

Status: Triage Type: Bug / Error

Difficulty 3/5 1-2 days Newbie friendliness 48/100

mermaid-js/mermaid#8076 · Opened Aug 19, 2026
Subgraph `direction` ignored and incoming edges clipped at cluster border since 11.16.0 Open

Status: Triage Type: Bug / Error

Difficulty 4/5 3-5 days Newbie friendliness 52/100

mermaid-js/mermaid#8066 · 2 comments · Opened Aug 15, 2026
C4: UpdateElementStyle colours are not validated before reaching a CSS declaration Open

Status: Triage

Difficulty 4/5 3-5 days Newbie friendliness 68/100

mermaid-js/mermaid#8057 · 1 comment · Opened Aug 12, 2026
ER diagram: unescaped double quote inside an entity name silently truncates it and rewrites the graph with phantom entities, instead of erroring Open

Status: Triage Type: Bug / Error

Difficulty 3/5 1-2 days Newbie friendliness 72/100

mermaid-js/mermaid#8054 · Opened Aug 12, 2026
Gantt: Does not draw bars if endDate includes a time Open

Status: Triage Type: Bug / Error

Difficulty 3/5 1-2 days Newbie friendliness 64/100

mermaid-js/mermaid#8052 · Opened Aug 11, 2026
Feature: allow arrows between lines of text Open

Status: Triage

Difficulty 5/5 Over a week Newbie friendliness 35/100

mermaid-js/mermaid#8051 · Opened Aug 11, 2026
Allow use of wildcards when applying a class Open

Status: Triage Type: Enhancement

Difficulty 4/5 3-5 days Newbie friendliness 55/100

mermaid-js/mermaid#8050 · Opened Aug 11, 2026
CI: netlify deploy-preview fails intermittently (~78% of builds) since 2026-08-07 Open

Status: Triage

Difficulty 4/5 3-5 days Newbie friendliness 42/100

mermaid-js/mermaid#8049 · 2 comments · Opened Aug 10, 2026

Showing the newest 100

This page lists what was indexed most recently. Advanced filter has the whole inventory, narrowed by language, difficulty and how long a task takes.

Open advanced filter

mermaid-js

Showing the newest 100

Get new issues in your inbox