Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
The caretRangeFromPoint() method of the Document interface returns a Range object for the document fragment under the specified coordinates.
This method is the WebKit-proprietary implementation of the Document.caretPositionFromPoint method.