Window.top
Returns a reference to the topmost window in the window hierarchy.
Syntax
js
var topWindow = window.top;
Notes
Where the window.parent (en-US) property returns the immediate parent of the current window, window.top returns the topmost window in the hierarchy of window objects.
This property is especially useful when you are dealing with a window that is in a subframe of a parent or parents, and you want to get to the top-level frameset.
명세서
| Specification |
|---|
| HTML Standard # dom-top-dev |
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