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Notice: The WebPlatform project, supported by various stewards between 2012 and 2015, has been discontinued. This site is now available on github.


Overview Table

Synchronous No
Bubbles No
Target dom/Element
Cancelable No
Default action ?
## Notes


The onresize event fires for block and inline objects with layout, even if document or CSS (cascading style sheets) property values are changed. Objects have layout when measurements such as the height and width attributes are set, or when the position of the object is set. Intrinsic objects, such as button, and windowed objects, such as window and iframe, fire as expected. This event does not fire for files with embedded controls. Resizing HTML applications also fires the onresize event. No default action. To invoke this event, do one of the following:

  • Change the height or width of the object.

The pEvtObj parameter is required for the following interfaces:

  • HTMLAnchorEvents2
  • HTMLAreaEvents2
  • HTMLButtonElementEvents2
  • HTMLControlElementEvents2
  • HTMLDocumentEvents2
  • HTMLElementEvents2
  • HTMLFormElementEvents2
  • HTMLImgEvents2
  • HTMLFrameSiteEvents2
  • HTMLInputFileElementEvents2
  • HTMLInputImageEvents2
  • HTMLInputTextElementEvents2
  • HTMLLabelEvents2
  • HTMLLinkElementEvents2
  • HTMLMapEvents2
  • HTMLMarqueeElementEvents2
  • HTMLObjectElementEvents2
  • HTMLOptionButtonElementEvents2
  • HTMLScriptEvents2
  • HTMLSelectElementEvents2
  • HTMLStyleElementEvents2
  • HTMLTableEvents2
  • HTMLTextContainerEvents2
  • HTMLWindowEvents2

window.onresize events in Metro style apps using JavaScript

In Metro style apps using JavaScript, the window.onresize event fires when the screen keyboard is shown and when the app’s viewport is resized. You can use the window.innerHeight, window.innerWidth, window.pageXOffset, and window.pageYOffset style properties to determine the size and location of the new viewport.


Standards information

There are no standards that apply here.

Event handler parameters

pEvtObj [in]
Type: ****IHTMLEventObj****