Feature Request idea: Allow textual serve to inject custom CSS and JavaScript for browser-delivered Textual apps

[EBICRMERP]

Feature Request: Allow textual serve to inject custom CSS and JavaScript for browser-delivered Textual apps

I'd love to enhance the experience of Textual apps when served over the web (via textual serve) by injecting custom CSS and JavaScript. This would allow developers to:

Match branding (fonts/colors)

Integrate clipboard/Web APIs

Improve accessibility

Add tooltips, help overlays, or modals

Suggested syntax:

textual serve app.py --inject-css static/style.css --inject-js static/app.js

This would not affect terminal clients, just the browser delivery.

Would this be feasible or in line with Textual’s vision of browser-extended terminals?

[willmcgugan]

You can do this already by working with the Server directly, and providing the template. See https://github.com/Textualize/textual-serve/blob/main/src/textual_serve/server.py#L65

Clipboard should already work.

I'd accept a PR to add it to the textual-dev command line.