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This repository was archived by the owner on May 12, 2026. It is now read-only.
Disappearing Cursor #2223
Description
Current behavior
Cursor disappears when clicking at the end of the line.
Expected behavior
Cursor should always be visible during edit mode.
Steps to reproduce
- Edit a document
- Click at the end of the line (highly reproducible on the list below ##When)
- Observe.
When
- Clicking at the far end of the line, meaning pixels away from the character.
- Clicking at the far end of the line with the last character as space.
- Clicking at the of a Header
Environment
- Version :Version 0.11.8 (0.11.8)
- OS Version and name :
macOS High Sierra 10.13.3 (17D47)
MacBook Pro (Retina, 13-inch, Early 2015)
Activity
abbasaleid-zz commentedon Jul 30, 2018
Same here. Could not understand why would this would happen? I would appreciate a fix for it as soon as possible. It's actually so annoying and confusing.
IssueHuntBot commentedon Jul 30, 2018
@BoostIO funded this issue with $30. Visit this issue on Issuehunt
daiyam commentedon Nov 10, 2018
@cristophercutas are you still having the issue? I can't reproduce it.
cristophercutas commentedon Nov 15, 2018
Apologies for the delayed response. Yes, I can still reproduce it. I am on version
0.11.10 (0.11.10).I tried it on another machine (same specs) and it was reproducible. I could not reproduce it on 100% zoom setting, but on 80% zoom setting the cursor disappears, although the scenario may vary. On machine 1 it only disappears on empty new lines, on machine 2 it only disappears at the end of a non-empty line.
Hope this helps.
willurd commentedon Nov 24, 2018
Digging around a little bit on this. It looks like this is an issue with CodeMirror. CodeMirror implements its own cursor, styled with a single border. When the app is zoomed to certain levels, the cursor disappears, but it's just a rounding error. If you set the
border-widthof.CodeMirror-cursorto3px, it should be visible at all zoom levels.You can also see correct cursor render behavior by putting your cursor in the tags field and zooming in and out - you should be able to see the cursor at all zoom levels.
Potential fixes for this include:
.CodeMirror-cursorelement wider so it's always visible. It looks like the Jupyterlab people had this same issue and addressed it last October: Ensure codemirror cursor size jupyterlab/jupyterlab#3164shriram-svg commentedon May 11, 2026
Opened #3793 with a small global CodeMirror cursor-width fix for the zoom-level disappearing cursor issue.