Partial character commit when moving focus to another textbox during IME composition
OS: Windows 10/11 · Device: Desktop or Laptop Any · Browser: Chrome 120+ · Keyboard: Korean (IME) - Microsoft IME
Open case →Scenario
IME composition when focus moves between elements (Korean and others)
If the user switches focus to another field, button, or nested contenteditable while Korean (or other) IME composition is active, browsers differ on whether composition is committed, cancelled, or leaves orphan state. Chrome, Safari, and Firefox do not agree; mobile adds more variance.
ime
Scenario ID
scenario-ime-composition-focus-change
Details
If the user switches focus to another field, button, or nested contenteditable while Korean (or other) IME composition is active, browsers differ on whether composition is committed, cancelled, or leaves orphan state. Chrome, Safari, and Firefox do not agree; mobile adds more variance.
Problem Overview
blur during composition triggers compositionend in some paths but not others; the same gesture on three engines can yield three different DOM outcomes.
Observed Behavior
- Focus moves to toolbar: in-flight Hangul may commit to the editor or disappear.
- Nested editables: focus may move without a full composition lifecycle.
Impact
Lost input, duplicate characters when refocusing, or editor state diverging from IME state.
Browser Comparison
This scenario groups ce-0229 / ce-0230 / ce-0231 (Chrome, Firefox, Safari) for Korean IME focus/blur—compare reproduction steps across cases.
Solutions
- On
blur, ifisComposing, optionally commit or cancel explicitly via IME-aware paths (platform-dependent; test only). - Avoid moving focus programmatically during active composition unless unavoidable.
Related Cases
References
Scenario flow
Visual view of how this scenario connects to its concrete cases and environments. Nodes can be dragged and clicked.
Variants
Each row is a concrete case for this scenario, with a dedicated document and playground.
| Case | OS | Device | Browser | Keyboard | Status |
|---|---|---|---|---|---|
| ce-0229-korean-ime-focus-blur-chrome | Windows 10/11 | Desktop or Laptop Any | Chrome 120+ | Korean (IME) - Microsoft IME | draft |
| ce-0230-korean-ime-focus-blur-firefox | Windows 10/11 | Desktop or Laptop Any | Firefox 120+ | Korean (IME) - Microsoft IME | draft |
| ce-0231-korean-ime-focus-blur-safari | macOS 13+ | Desktop (Mac) Any | Safari 17+ | Korean (IME) - macOS Korean Input Method | draft |
Browser compatibility
This matrix shows which browser and OS combinations have documented cases for this scenario. Click on a cell to view the specific case.
| Browser | Windows | macOS |
|---|---|---|
| Chrome | — | |
| Firefox | — | |
| Safari | — |
Confirmed
Draft
— No case documented
Cases
Open a case to see the detailed description and its dedicated playground.
Jamo remains when moving focus to another textbox during IME composition (Firefox)
OS: Windows 10/11 · Device: Desktop or Laptop Any · Browser: Firefox 120+ · Keyboard: Korean (IME) - Microsoft IME
Open case →Unexpected behavior when moving focus to another textbox during IME composition (Safari)
OS: macOS 13+ · Device: Desktop (Mac) Any · Browser: Safari 17+ · Keyboard: Korean (IME) - macOS Korean Input Method
Open case →Related Scenarios
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Comments & Discussion
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