Mermaid Preview

This is an app for Slack that renders Mermaid diagrams in Slack.

This app adds a /mermaid command to your Slack workspace. You can use it to post Mermaid diagrams in Slack messages.

How it works

The app listens for a /mermaid command and opens a Slack modal where you can enter your Mermaid diagram code. After you submit the modal, the app renders the diagram using Mermaid CLI into a PNG file. This PNG is uploaded to Slack and posted as a message. PNG is deleted from the server after it's posted.

Wishlist

• Edit already posted diagram (through Modal?)
• Automatically detect Mermaid diagrams in messages and render them?
• Live preview of the mermaid document in the modal? Seems like this can't be done with Slack's UI limitations.
• Support DMs, more context in the comment.