10000 Gantt: Task duration fails silently if it contains extra characters like e, 8, +, =, ...etc · Issue #6586 · mermaid-js/mermaid · GitHub
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Gantt: Task duration fails silently if it contains extra characters like e, 8, +, =, ...etc #6586

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NourBenz opened this issue May 11, 2025 · 0 comments
Open

Gantt: Task duration fails silently if it contains extra characters like e, 8, +, =, ...etc #6586

NourBenz opened this issue May 11, 2025 · 0 comments
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Status: Triage Needs to be verified, categorized, etc Type: Bug / Error Something isn't working or is incorrect

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@NourBenz
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NourBenz commented May 11, 2025 •
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Description

When defining a Gantt task duration like 24d, everything works as expected. However, if the duration string contains extra characters (e.g., 24de, 24d+, 24d=, 24d7), the task silently fails to render.

This issue allows the diagram to continue rendering, but omits the faulty task without any visible warning or error. This makes debugging very difficult.

Steps to reproduce

  1. Go to Mermaid Live Editor – Develop
  2. Paste the following Gantt diagram code:
gantt
    title A Gantt Diagram
    dateFormat YYYY-MM-DD
    section Section
        A task          :a1, 2014-01-01, 30d
        Another task    :after a1, 20d
    section Another
        Task in Another :2014-01-12, 12d
        another task    :24de
  1. Run the code
  2. Observe that another task of section Another is not rendered, but no error is displayed

Screenshots

Image

Image

Code Sample

gantt
    title A Gantt Diagram
    dateFormat YYYY-MM-DD
    section Section
        A task          :a1, 2014-01-01, 30d
        Another task    :after a1, 20d
    section Another
        Task in Another :2014-01-12, 12d
        another task    :24d

Setup

Mermaid version: 11.6.0
Browser: Chrome 124
OS: Windows 11

Suggested Solutions

No response

Additional Context

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@NourBenz NourBenz added Type: Bug / Error Something isn't working or is incorrect Status: Triage Needs to be verified, categorized, etc labels May 11, 2025
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