scratchfoundation / scratchfoundation/scratch-blocks
Stack Glow causes text in blocks to wiggle on Firefox
Nobody has claimed this yet.
- Dominant language
- JavaScript
- Stars
- 2.8k
- Forks
- 1.6k
- Avg merge
- 4h 51m
- Merged PRs (30d)
- 12
Description
Expected Behavior
When a stack is glowing the text on the block stays in the same place as when it's not glowing.
Actual Behavior
It moves to a slightly different position. When the glow flashes on and off rapidly this makes the text wiggle.

Steps to Reproduce
Load this project: https://llk.github.io/scratch-gui/develop/#216001494
Run it
Note: the "When I receive [start]" block texts moves slightly.
Operating System and Browser
Firefox on Mac and Windows
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
Start by loading the linked Scratch project in Firefox on Mac or Windows and compare the block text while stack glow flashes. Trace the block rendering and glow behavior responsible for the text position. Done means the text stays in the same place whether the stack is glowing or not, without the reported wiggle.
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
- 35/100