Fix: example.js stores defaultHTML function reference instead of calling it, causing examples to display raw JavaScript source in preview

Maintainers usually reply within 3 days

Assessment

Research direction

Description

p5.js version

v18.20.8

What is your operating system?

Windows

Web browser and version

Brave1.96.61 Chromium: 154.0.8037.98 (Official Build) (64-bit)

Actual Behavior

Bug Description

When running npm run fetch-examples locally, opening any example sketch
shows raw JavaScript function source code in the preview panel instead of
rendering a proper HTML page.

The preview panel displays raw JavaScript function source code:

Expected Behavior

The preview panel renders a proper HTML page that runs the p5.js sketch.

Steps to Reproduce:

1. Clone the repository and complete manual installation
2. Run npm run fetch-examples
3. Start the server with npm start
4. Open any example sketch from File → Examples
5. Observe the preview panel

https://github.com/user-attachments/assets/26ab75c4-21c7-4937-8e80-c75395302137

Getting set up

First steps

1. Read the whole issue, then the project's contributing guide.
2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
3. Fork the repository and make your change on a branch.
4. Open a pull request that references the issue number.

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