mathiasbynens / mathiasbynens/document.scrollingElement
scrollTop keeps being 0 within iframe on Safari iOS 12.2 (iPad)
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- Dominant language
- JavaScript
- Stars
- 131
- Forks
- 14
- PR merge metrics
- No merged PRs in 30d
Description
I'm running a little local example with localhost HTTPS server to test this specific iPad issue, thought this polyfill would help me but even when using this scrollingElement, it keeps returning 0 when doing `document.scrollingElement.scrollTop`.
It ONLY happens if the scrolling is being done within iframe.
Any ideas?
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the report with the local HTTPS example on an iPad running Safari iOS 12.2, with scrolling inside an iframe. Inspect document.scrollingElement.scrollTop during that scrolling and trace the polyfill behavior. Done means the scrolling element reports the expected position in this iframe scenario, with a regression test if the repository has an appropriate test location.
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Assessment
- Tech stack
- javascript
- Domain
- frontend
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 30/100