Fired with the
content which comes from the clipboard (was pasted or dropped) should be processed in order to be inserted into the editor.
dataTransfer object is available in case the transformation functions need access to the raw clipboard data.
method indicates the original DOM event (for example
targetRanges property is an array of view ranges (it is available only for
Event handlers can modify the content according to the final insertion position.
It is a part of the clipboard input pipeline.
Note: You should not stop this event if you want to change the input data. You should modify the
content property instead.