reactjs / reactjs/react.dev

Page is jumping when scrolling

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#5,995 9 comments 10 reactions 0 assignees View on GitHub

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bug: confirmed
Dominant language
JavaScript
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Description

Hey!

I was scrolling the page and it appeared that it was jumping all over the time.

Firstly I thought that it was related to expandable, but I found out that actually, this was due to a change of height in the iframe example

Here is the little video:

Screencast 2023-05-04 17-56-57.webm

Page it was discovered on:

https://react.dev/learn/updating-objects-in-state#copying-objects-with-the-spread-syntax

Contributor guide

Open the contributing guide

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

Start at the linked Updating Objects in State page and reproduce the scroll jump while the iframe example changes height. Inspect the iframe example's sizing behavior and verify that scrolling remains stable after its height changes.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript, react
Domain
documentation, frontend
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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