Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
The initMutationEvent() method of the MutationEvent interface initializes the value of a mutation event once it's been created (normally using the Document.createEvent() method).
This method must be called to set the event before it is dispatched, using EventTarget.dispatchEvent().
Note: In general, you won't create these events yourself; they are created by the browser.