Observed arrival · 2026-10-09
Caretline makes a text editor replayable
Caretline is a headless text-editing engine that represents the editor as JSON state and processes input as messages.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Developers embedding or scripting text-editing behavior
- Worth noticing
- The homepage reports 835–1,674 full-state updates per second in its tests, while noting that frames with more selection ranges run slower.
Field notes
The page’s guided terminal tour walks through word and row movement, selection, multiple carets, undo, folding, and opening a second view; its status bar names keys as the reader moves through the lesson. The browser playground runs a WebAssembly build and offers trace replay. Performance figures are reported for unthrottled socket requests on an Apple-silicon Mac release build, and the page notes that frames with more selection ranges are slower.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue