Issues

• Flowchart parser drops the target node when there's a space before |label|

  lukilabs/beautiful-mermaid#155 · Filter by author NahumLitvin opened on Oct 2, 2026

• ASCII: vertical edge lines draw through spaces in edge labels

  lukilabs/beautiful-mermaid#154 · Filter by author NahumLitvin opened on Oct 2, 2026

• Support rendering in Web Workers and Cloudflare Workers

  lukilabs/beautiful-mermaid#149 · Filter by author miantiao-me opened on Sep 7, 2026
  1

• ASCII backend: an edge-less node in a target subgraph merges two subgraph frames and overwrites their titles

  lukilabs/beautiful-mermaid#143 · Filter by author theimpostor opened on Aug 17, 2026
  2

• Bug: A-->B (no space before the arrow) parses as a single node A-- and drops the edge

  lukilabs/beautiful-mermaid#140 · Filter by author Bougerous opened on Aug 12, 2026
  2

• subgraphs are not rendered properly

  lukilabs/beautiful-mermaid#138 · Filter by author brc-dd opened on Jul 18, 2026

• ASCII output: inline <i>/<b> tags rendered literally; edges to subgraph IDs create phantom nodes

  lukilabs/beautiful-mermaid#137 · Filter by author elenaOnline opened on Jul 16, 2026
  1

• Bug: marker-start arrowheads missing on bidirectional (<-->) and backward (<-.-) SVG edges

  lukilabs/beautiful-mermaid#133 · Filter by author wsnark opened on Jul 6, 2026

• Feature: Add support for directions in erDiagram

  lukilabs/beautiful-mermaid#131 · Filter by author Vahor opened on Jun 22, 2026
  1

• How to selectively change font family of certain nodes in graphs?

  lukilabs/beautiful-mermaid#130 · Filter by author novusnota opened on Jun 18, 2026

• Alias is not supported (in erDiagram)

  lukilabs/beautiful-mermaid#129 · Filter by author denilsonsa opened on Jun 16, 2026
  1

• bug: Syntax error / parser crash when a node label contains brackets inside double quotes (e.g., "xx[]yy")

  lukilabs/beautiful-mermaid#125 · Filter by author rambo-panda opened on Jun 3, 2026
  2

• Incorrect cardinality symbol in erDiagram parser

  lukilabs/beautiful-mermaid#124 · Filter by author denilsonsa opened on Jun 3, 2026
  2

• ASCII output: fullwidth (CJK/emoji) labels misalign box borders (grid assumes 1 cell = 1 display col)

  lukilabs/beautiful-mermaid#122 · Filter by author ivanmkc opened on Jun 1, 2026
  2

• ASCII output: ER labels truncated/overlapping, stray ├ on edge labels, inconsistent class compartments

  lukilabs/beautiful-mermaid#121 · Filter by author ivanmkc opened on May 31, 2026
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• ASCII rendering misaligned when node labels contain CJK (fullwidth) characters

  lukilabs/beautiful-mermaid#119 · Filter by author cycle2zhou opened on May 28, 2026
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• Node label text unreadable on custom fills in dark mode (white-on-light contrast)

  lukilabs/beautiful-mermaid#115 · Filter by author linjiejim opened on May 21, 2026

• Add support for TreeView diagrams (mermaid v.11.14.0+)

  lukilabs/beautiful-mermaid#114 · Filter by author ebardie opened on May 20, 2026

• Box-start connector (├) displaced from the source box border when a sibling edge has a label (ASCII)

  lukilabs/beautiful-mermaid#112 · Filter by author rmvegasm opened on May 19, 2026
  1

• Sibling edges from the same source fail to share a trunk segment (ASCII)

  lukilabs/beautiful-mermaid#111 · Filter by author rmvegasm opened on May 19, 2026
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• Sequence ASCII renderer: self-arrow inside an alt/loop/opt block is drawn outside the block

  lukilabs/beautiful-mermaid#108 · Filter by author aahoughton opened on May 6, 2026

• Sequence ASCII renderer: <br/> in a self-arrow label corrupts the canvas

  lukilabs/beautiful-mermaid#107 · Filter by author aahoughton opened on May 6, 2026

• Feature request: configurable sequence diagram layout constants via RenderOptions

  lukilabs/beautiful-mermaid#101 · Filter by author jav-ed opened on May 2, 2026

• Feature request: configurable font sizes via RenderOptions

  lukilabs/beautiful-mermaid#100 · Filter by author jav-ed opened on May 2, 2026

• Bug: CJK Characters in Subgraph Title Cause Incorrect Layout (Labels Float to Top)

  lukilabs/beautiful-mermaid#89 · Filter by author keenlin opened on Apr 15, 2026
  2