Window resizeBy()

Open a new window, and resize (increase) the width and height:

function openWin() {
myWindow = window.open("", "", "width=100, height=100");
}

function resizeWin() {
myWindow.resizeBy(250, 250);
}

More examples below.

Description

The resizeBy() method resizes a window by a specified amount.

resizeBy(width, height)

Parameter	Description
width	Required. A positive or a negative number. The number of pixels to resize the width by.
height	Required. A positive or a negative number. The number of pixels to resize the height by.

NONE

Open a new window, and decrease the width by 50px and increase the height by 50px:

myWindow.resizeBy(-50, 50);

Using resizeBy() with resizeTo():

function resizeWinTo() {
myWindow.resizeTo(800, 600);
myWindow.focus();
}

function resizeWinBy() {
myWindow.resizeBy(-100, -50);
}

resizeBy() is supported in all browsers:


Chrome	Edge	Firefox	Safari	Opera	IE
Yes	Yes	Yes	Yes	Yes	Yes