Heatmap PNG Download Missing Plot on macOS/iOS/iPadOS Safari and other iOS/iPadOS WebKit-based browsers
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- Dominant language
- JavaScript
- Stars
- 18.3k
- Forks
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- Avg merge
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- Merged PRs (30d)
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Description
Something that I noticed while checking out 2.23.0, and with older versions of Plotly.js, is that saving the image of a heatmap using the built-in download plot as a PNG file does not include the heatmap image in Safari. Checking back with previous versions, including 2.20.0, the behavior exists there as well. It's included in the PNG download in Firefox and Chrome.
Since it seems to be an issue with WebKit, it would be a decent assumption that the issue would also appear on other iOS and iPadOS browsers that use WebKit as a rendering engine.
Screenshot: https://imgur.com/a/c4iCy9n
Live example (v2.20.0): https://graphs.wwdt.me/shows/monthly-aggregate-score-heatmap
Contributor guide
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
Reproduce the missing heatmap in the linked live example using Safari or another iOS/iPadOS WebKit browser, then compare the PNG download with Firefox or Chrome. Trace the built-in download-plot export path and identify why the heatmap is absent in WebKit; done means the downloaded PNG includes the heatmap without regressing other browsers.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript
- Domain
- data-visualization
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100