beforeinput event not cancelable during IME composition
OS: Windows Any · Device: Desktop or Laptop Any · Browser: Chrome Latest · Keyboard: Korean
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beforeinput event not cancelable during IME composition
beforeinput event not cancelable during IME composition
Scenario ID
scenario-beforeinput-not-cancelable-ime
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| Case | OS | Device | Browser | Keyboard | Status |
|---|---|---|---|---|---|
| ce-0305-beforeinput-not-cancelable-ime | Windows Any | Desktop or Laptop Any | Chrome Latest | Korean | draft |
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Related Scenarios
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Tags: beforeinput, ime, composition
beforeinput and input events have different inputType values
During IME composition or in certain browser/IME combinations, the beforeinput event may have a different inputType than the corresponding input event. For example, beforeinput may fire with insertCompositionText while input fires with deleteContentBackward. This mismatch can cause handlers to misinterpret the actual DOM change and requires storing beforeinput's targetRanges for use in input event handling.
1 case
Tags: beforeinput, ime, composition
Selection mismatch between beforeinput and input events
The selection (window.getSelection()) in beforeinput events can differ from the selection in corresponding input events. This mismatch can occur during IME composition, text prediction, or when typing adjacent to formatted elements like links. The selection in beforeinput may include adjacent formatted text, while input selection reflects the final cursor position.
1 case
Tags: beforeinput, ime, composition
getTargetRanges() returns empty array in beforeinput events
The getTargetRanges() method in beforeinput events may return an empty array or undefined in various scenarios, including text prediction, certain IME compositions, or specific browser/device combinations. When getTargetRanges() is unavailable, developers must rely on window.getSelection() as a fallback, but this may be less accurate.
1 case
Tags: beforeinput, ime, composition
insertParagraph preventDefault breaks IME composition state in Safari
In Safari desktop, when preventDefault() is called on keydown or beforeinput events for insertParagraph (Enter key), the IME composition state becomes corrupted. Subsequent text input fails to trigger proper input events, causing characters to not be inserted or composition to malfunction.
3 cases
Tags: ime, composition
Browser translation breaks contenteditable editing
When browser translation features (like Google Translate) are activated, they manipulate the DOM by replacing text content and injecting elements. This can break contenteditable functionality, causing cursor positioning issues, event handling problems, and IME composition failures.
1 case
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