Mermaid Markdown Syntax

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Mermaid has been popping up in my Github Daily Emails. It is used for 'Generation of diagram and flowchart from text in a similar manner as markdown'.

  1. Mermaid is a Javascript based diagramming and charting tool that uses Markdown-inspired text definitions and a renderer to create and modify complex diagrams. The main purpose of Mermaid is to help documentation catch up with development. Doc-Rot is a Catch-22 that Mermaid helps to solve.
  2. Cheat Sheet for Mermaid. Gantt dateFormat YYYY-MM-DD title Adding GANTT diagram functionality to mermaid section A section Completed task:done, des1, 2018-01-08 Active task:active, des2, 2018-01-09, 3d Future task: des3, after des2, 5d Future task2: des4, after des3, 5d section Critical tasks Completed task in the critical line:crit, done, 2018-01-06,24h Implement parser.
  3. Enter mermaid syntax! Mermaid syntax is a Markdown-inspired syntax that enables you to automatically generate diagrams in So if you are used to working in a text-based format, this is the perfect way for you to diagram more efficiently. There are many different kinds of diagrams that you can create using this method, including flow.

You can create diagrams in Joplin using the Mermaid syntax. To add such a graph, wrap the Mermaid script inside a '```mermaid' code block like this: ```mermaid graph TD; A-B; A-C; B-D; C-D; ``` This is how it would look with the Markdown on the left, and rendered graph on the right.

In index.html, a Mermaid diagram is defined within a <div>. A chuck of Mermaid syntax is place in between the block element. The syntax determines the shape, connections, and text annotating the diagram. Below is some syntax that generates the graph on


Example Syntax

This Gist

Fork this gist and create your own diagrams and host them on

mermaid GitHub repo
mermaid - Markdownish syntax for generating flowcharts, sequence diagrams, class diagrams, gantt charts and git graphs.
Online editor
Cheat sheet
Mermaid Cheat Sheet @


docker image

I compiled this docker image myself asexisting images on dockerhub were outdated.


I bumped the mermaid version up from 8.2.6 to8.4.4 because some of the examples were notworking but I’m still not able to build some of the diagrams.

0.5.1 is the most up-to-date version of mermaid-cli.

Nitrogen mass number. Atomic Mass of Nitrogen Atomic mass of Nitrogen is 14.0067 u. Nitrogen is a chemical element with symbol N and atomic number 7. Classified as a nonmetal, Nitrogen is a gas at room temperature.

emacs modes

  • mermaid-mode
  • ob-mermaid


What’s working


Sequence diagrams

git graphs

class diagrams

gantt charts

What’s not working for me

ER diagrams

Pie charts

State diagrams

Scripts and configuration

mmdc docker wrapper script

mermaid-mode emacs config

Mermaid - Generation Of Diagrams And Flowcharts From Text In ..

mermaid-show script for displaying externally to emacs

Additional docker commands

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The error I’m seeing