clip CSS property defines what portion of an element is visible. The clip property applies only to absolutely positioned elements, that is elements with position:absolute or position:fixed.Event.initEvent() method is used to initialize the value of an event created using Document.createEvent().version property of the IDBVersionChangeEvent interface returns The new version of the database in a versionchange transaction.ProgressEvent.initProgressEvent() method Initializes an animation event created using the deprecated Document.createEvent("ProgressEvent") method.