How to build custom form controls: JS example is not accessible

### MDN URL

https://developer.mozilla.org/en-US/docs/Learn/Forms/How_to_build_custom_form_controls

### What specific section or headline is this issue about?

With JS

### What information was incorrect, unhelpful, or incomplete?

When custom form controls are created they must be keyboard accessible. The select that ges focus is offscreen for screen readers and not available for keyboard users

### What did you expect to see?

accessible examples

### Do you have any supporting links, references, or citations?

_No response_

### Do you have anything more you want to share?

_No response_

### MDN metadata

Page report details

* Folder: `en-us/learn/forms/how_to_build_custom_form_controls`
* MDN URL: https://developer.mozilla.org/en-US/docs/Learn/Forms/How_to_build_custom_form_controls
* GitHub URL: https://github.com/mdn/content/blob/main/files/en-us/learn/forms/how_to_build_custom_form_controls/index.md
* Last commit: https://github.com/mdn/content/commit/289d6314f3368aa3e28524e7d090f6e9c704e3b1
* Document last modified: 2023-11-28T20:48:44.000Z