The data read-only property of the CompositionEvent interface returns the characters generated by the input method that raised the event; its exact nature varies depending on the type of event that generated the CompositionEvent object.


 myData =


A DOMString representing the event data:

  • For compositionstart events, this is the currently selected text that will be replaced by the string being composed. This value doesn't change even if content changes the selection range; rather, it indicates the string that was selected when composition started.
  • For compositionupdate, this is the string as it stands currently as editing is ongoing.
  • For compositionend events, this is the string as committed to the editor.


Specification Status Comment
Document Object Model (DOM) Level 3 Events Specification
The definition of 'data' in that specification.
Obsolete Initial definition.

Browser compatibility

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Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) 9.0 (9.0) (Yes) No support ?
Feature Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? (Yes) 9.0 (9.0) ? ? ?

See also

Document Tags and Contributors

 Contributors to this page: chrisdavidmills
 Last updated by: chrisdavidmills,