Diagramming in Webflow with Mermaid.js 🧜‍♀️

How to set up a Mermaid.js diagram on your Webflow site, the shortest guide possible:

Install Mermaid for a specific post

Add an HTML Embed Code by clicking on this button:

html embed button

Copy this HTML Embed Code snippet to the top of the post.

<script type="module">
  // Include mermaid.js
  import mermaid from 'https://cdn.jsdelivr.net/npm/mermaid@10/dist/mermaid.esm.min.mjs';
  // Initialize the Mermaid chart
    startOnLoad: true,
    // Apply the dark theme - replace with what you want.
    // options can be found here: http://mermaid.js.org/config/theming.html#available-themes
    theme: 'dark' 

This looks bad in the preview:


But it will disappear when you publish the post.

Add Mermaid diagrams

Choose where you want to add a Mermaid diagram. Add an HTML Embed Code snippet. It should look like this:

<pre class="mermaid">
  <!-- Graph code goes here! -->

Note the class="mermaid" part. That’s what makes the magic happen.

That’s it! You can now add Mermaid diagrams to your Webflow site.


For example, this is a chart I did for Lunar recently:

<pre class="mermaid">
    participant Earth as 🌍 Your application
    participant Alien as 👽 The server
    Earth->>Alien: 📨 Request
    Alien->>Earth: 📝 Successful Response

Which turned out like this: