Window resizeBy() Method
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
}
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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 |
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);
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Example
Using the resizeBy() method together with resizeTo():
function resizeWinTo() {
myWindow.resizeTo(800, 600);
myWindow.focus();
}
function resizeWinBy() {
myWindow.resizeBy(-100, -50);
myWindow.focus();
}
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Example
Resize the topmost browser window with 100px each way (works only in IE and Safari):
top.resizeBy(100, 100);
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❮ Window Object
