The HTMLFrameSetElement interface provides special properties (beyond those of the regular HTMLElement interface they also inherit) for manipulating <frameset> elements.

Inherits properties from its parent, HTMLElement.

HTMLFrameSetElement.cols Deprecated

A string structured as a comma-separated list specifying the width of each column inside a frameset.

HTMLFrameSetElement.rows Deprecated

A string structured as a comma-separated list specifying the height of each column inside a frameset.

No specific method; inherits methods from its parent, HTMLElement.

The HTMLElement events are inherited.

The following Window onXYZ event handler properties are also available as aliases targeting the window object. However, it is advised to listen to them on the window object directly rather than on HTMLFrameSetElement.

HTMLFrameSetElement.onafterprint

Fired after the associated document has started printing or the print preview has been closed.

HTMLFrameSetElement.onbeforeprint

Fired when the associated document is about to be printed or previewed for printing.

HTMLFrameSetElement.onbeforeunload

Fired when the window, the document and its resources are about to be unloaded.

HTMLFrameSetElement.ongamepadconnected

Fired when the browser detects that a gamepad has been connected or the first time a button/axis of the gamepad is used.

HTMLFrameSetElement.ongamepaddisconnected

Fired when the browser detects that a gamepad has been disconnected.

HTMLFrameSetElement.onhashchange

Fired when the fragment identifier of the URL has changed (the part of the URL beginning with and following the # symbol).

HTMLFrameSetElement.onlanguagechange

Fired when the user's preferred language changes.

HTMLFrameSetElement.onmessage

Fired when the window receives a message, for example from a call to Window.postMessage() from another browsing context.

HTMLFrameSetElement.onmessageerror

Fired when the window receives a message that can't be deserialized.

HTMLFrameSetElement.onoffline

Fired when the browser has lost access to the network and the value of Navigator.onLine switches to false.

HTMLFrameSetElement.ononline

Fired when the browser has gained access to the network and the value of Navigator.onLine switches to true.

HTMLFrameSetElement.onpagehide

Fired when the browser hides the current page in the process of presenting a different page from the session's history.

HTMLFrameSetElement.onpageshow

Fired when the browser displays the window's document due to navigation.

HTMLFrameSetElement.onpopstate

Fired when the active history entry changes while the user navigates the session history.

HTMLFrameSetElement.onrejectionhandled

Fired whenever a JavaScript Promise is rejected and the rejection has been handled.

HTMLFrameSetElement.onstorage

Fired when a storage area (localStorage) has been modified in the context of another document.

HTMLFrameSetElement.onunhandledrejection

Fired whenever a Promise is rejected but the rejection was not handled.

HTMLFrameSetElement.onunload

Fired when the document is being unloaded.

• HTML element implementing this interface: <frameset>
• The equivalent of this element outside of frames: HTMLFrameSetElement.