CharacterBoundsUpdateEvent: rangeEnd property

The CharacterBoundsUpdateEvent.rangeEnd read-only property represents the offset of the last character within the editable text region for which the operating system needs the bounds.

A Number.

This example shows how to use the characterboundsupdate event and read the value of the rangeStart and rangeEnd properties.

const editContext = new EditContext();
editorElement.editContext = editContext;

editContext.addEventListener("characterboundsupdate", (e) => {
  console.log(
    `The OS needs the bounds of the chars at ${e.rangeStart} - ${e.rangeEnd}.`,
  );
});