The Window.resizeBy()
method resizes the current window by a specified amount.
Syntax
window.resizeBy(xDelta, yDelta)
Parameters
xDelta
is the number of pixels to grow the window horizontally.yDelta
is the number of pixels to grow the window vertically.
Example
// Shrink the window window.resizeBy(-200, -200);
Notes
This method resizes the window relative to its current size. To resize the window in absolute terms, use window.resizeTo()
.
Creating and resizing an external window
For security reasons, it's no longer possible in Firefox for a website to change the default size of a window in a browser if the window wasn’t created by window.open()
, or contains more than one tab. See the compatability table for details on the change.
Even if you create window by window.open()
it is not resizable by default. To make the window resizable, you must open it with the "resizable"
feature.
// Create resizable window myExternalWindow = window.open("http://myurl.domain", "myWindowName", "resizable"); // Resize window to 500x500 myExternalWindow.resizeTo(500, 500); // Make window relatively smaller to 400x400 myExternalWindow.resizeBy(-100, -100);
The window you create must respect the Same Origin Policy. If the window you open is not in the same orgin as the current window, you will not be able to resize, or access any information on, that window/tab.
Specifications
Specification | Status | Comment |
---|---|---|
CSS Object Model (CSSOM) View Module The definition of 'window.resizeBy()' in that specification. |
Working Draft |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
resizeBy | Chrome Full support Yes | Edge Full support 12 | Firefox
Full support
Yes
| IE ? | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support Yes | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown
- See implementation notes.
- See implementation notes.