HyperJS renders l and h on every newline on Windows WSL
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Description
- I am on the latest Hyper.app version
- I have searched the issues of this repo and believe that this is not a duplicate
- OS version and name: Windows 10 Latest
- Hyper.app version: 3.2.3
- Link of a Gist with the contents of your .hyper.js: https://gist.github.com/pakoito/1c784fc649615ca1bcf0784b601e9750
- The issue is reproducible in vanilla Hyper.app: Yes
Issue
HyperJS renders endline l and newline h markers on Windows and WSL. These disappear if you force a re-render by resizing the window. Neither WebGL nor Canvas rendering fix this issue.

Contributor guide
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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
Reproduce the issue on Windows 10 with WSL using Hyper.app 3.2.3 and the linked .hyper.js configuration. Compare the initial rendering with a resize-triggered re-render, and test both WebGL and Canvas; done means endline l and newline h markers no longer appear during normal rendering.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- cli, desktop, frontend
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100