reactjs / reactjs/react.dev

Mobile navigation width is offset by scrollbar

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JavaScript
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Description

On browsers that support ::webkit-scrollbar, the navigation width is offset by the width of the scrollbar, hence not exactly 100% of the overflowing parent.

In other browsers (e.g. Firefox, iOS browsers), the navigation width is correctly set to 100% of the overflowing parent, and with uneven padding on the parent, the nav looks like it's overflowing.

Chrome with transparent ::webkit-scrollbar:
Screenshot 2023-03-18 at 10 58 33 pm

Chrome without:
Screenshot 2023-03-18 at 10 58 44 pm

Firefox that supports scrollbar-color instead:
Screenshot 2023-03-18 at 10 59 34 pm

Contributor guide

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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.

Research direction

Reproduce the navigation behavior in Chrome and Firefox, focusing on the overflowing parent and the scrollbar styling mentioned in the report. Inspect the navigation styling and compare the result with and without ::webkit-scrollbar or scrollbar-color support. Done means the navigation is exactly 100% of the overflowing parent without visual overflow or offset.

Written by the indexing model from the issue text.

Assessment

Tech stack
css
Domain
frontend
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
38/100

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