Window resizeBy() Method
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Window resizeBy() Method
❮ Window Object
Example
Open a new window, and resize the width and height 250px relative to its
current position:
function openWin()
myWindow = window.open("", "", "width=100, height=100"); // Opens a new window
function resizeWin()
myWindow.resizeBy(250, 250); // Resizes the new window
myWindow.focus(); // Sets focus to the new window
Try it Yourself »
More "Try it Yourself" examples below.
Definition and Usage
The resizeBy() method resizes a window by the specified amount, relative to its current size.
Note: This method moves the bottom right corner of the window by the
specified number of pixels defined. The top left corner will not be moved (it
stays in its original coordinates).
Related methods:
resizeTo() - Resizes the window to the specified width and height
moveBy() - Moves a window relative to its current position
moveTo() - Moves a window to the specified position
Browser Support
| Method | |||||
|---|---|---|---|---|---|
| resizeBy() | Yes | Yes | Yes | Yes | Yes |
Syntax
resizeBy(width, height)Parameter Values
| Parameter | Type | Description |
|---|---|---|
| width | Number | Required. A positive or a negative number that specifies how many pixels to resize the width by |
| height | Number | Required. A positive or a negative number that specifies how many pixels to resize the height by |
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Technical Details
| Return Value: | No return value |
|---|
More Examples
Example
Open a new window, and decrease the width by 50px and increase the height by
50px:
myWindow.resizeBy(-50, 50);Try it Yourself »
Example
Using the resizeBy() method together with resizeTo():
function resizeWinTo()
myWindow.resizeTo(800, 600);
myWindow.focus();
function resizeWinBy()
myWindow.resizeBy(-100, -50);
myWindow.focus();
Try it Yourself »
Example
Resize the topmost browser window with 100px each way (works only in IE and
Safari):
top.resizeBy(100, 100);
Try it Yourself »
❮ Window Object
