Created
July 11, 2025 16:57
-
-
Save ftes/50d60107043093ba3624cae38c5dffaf to your computer and use it in GitHub Desktop.
reveal.js + mermaid.js: Fix diagram size, text clipping, lazy loading
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!doctype html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8" /> | |
| <meta | |
| name="viewport" | |
| content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" | |
| /> | |
| <title>Let it Crash with Elixir</title> | |
| <link rel="stylesheet" href="dist/reset.css" /> | |
| <link rel="stylesheet" href="dist/reveal.css" /> | |
| <link rel="stylesheet" href="dist/theme/night.css" /> | |
| <!-- Theme used for syntax highlighted code --> | |
| <link rel="stylesheet" href="plugin/highlight/monokai.css" /> | |
| <style> | |
| .mermaid svg { | |
| max-width: initial !important; | |
| max-height: 100%; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class="reveal"> | |
| <div class="slides"> | |
| <section>Diagram on next slide</section> | |
| <section> | |
| <pre class="mermaid r-stretch"> | |
| sequenceDiagram | |
| create participant c1 | |
| main->>c1: spawn | |
| create participant c2 | |
| main->>c2: spawn | |
| main->>c1: {:increment, main} | |
| main->>c2: :crash | |
| destroy c2 | |
| main--xc2: crashed | |
| c1->>main: {:count, 2} | |
| </pre> | |
| </section> | |
| </div> | |
| </div> | |
| <script src="dist/reveal.js"></script> | |
| <script src="plugin/notes/notes.js"></script> | |
| <script src="plugin/markdown/markdown.js"></script> | |
| <script src="plugin/highlight/highlight.js"></script> | |
| <!-- Allow caching (type="module" doesn't cache?) --> | |
| <script src="https://cdn.jsdelivr.net/npm/mermaid@11/dist/mermaid.min.js"></script> | |
| <script> | |
| Reveal.initialize({ | |
| startOnLoad: false, | |
| hash: true, | |
| plugins: [RevealMarkdown, RevealHighlight, RevealNotes], | |
| }); | |
| mermaid.initialize({ | |
| startOnLoad: false, | |
| theme: "dark", | |
| securityLevel: "loose", | |
| }); | |
| Reveal.on("slidechanged", async (event) => { | |
| const selector = `.present .mermaid`; | |
| const els = document.querySelectorAll(selector); | |
| const scale = Reveal.getScale(); | |
| const invertScale = 1 / scale; | |
| // Temporarily reset diagram scale so that mermaid layout alg runs normally | |
| els.forEach((el) => { | |
| el.style.transform = `scale(${invertScale})`; | |
| }); | |
| await mermaid.run({ querySelector: selector }); | |
| els.forEach((el) => { | |
| el.style.transform = ""; | |
| }); | |
| Reveal.layout(); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment