scratchfoundation / scratchfoundation/scratch-blocks
When duplicating a block, the copy doesn't appear until I move the mouse
Nobody has claimed this yet.
- Dominant language
- JavaScript
- Stars
- 2.8k
- Forks
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- Avg merge
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- Merged PRs (30d)
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Description
Expected Behavior
When I duplicate a block, the copy should immediately show up at the mouse pointer position.
Actual Behavior
When I duplicate a block, I just see a shadow. Only when I slightly move the mouse pointer does the copy of the block actually show up.

Steps to Reproduce
Duplicate a block, and don't move the mouse pointer.
Operating System and Browser
Mac OS, Chrome
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 block duplication in Scratch Blocks on Mac Chrome, keeping the mouse pointer still after duplication. Trace the duplication and rendering behavior around the pointer position; done when the copied block appears immediately without requiring mouse movement.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript
- Domain
- frontend
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100