HTML DOM Window resizeBy() Method

Last Updated : 15 Jun, 2023

The resizeBy() method in HTML Window is used to resize a window by the specified amount, relative to its current size.

Syntax:

resizeBy(width, height)

property value:

width: A that specifies the resize pixels of width.
height: A that specifies the resize pixels of height.

Example:

html

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
      Window resizeBy() Method 
  </title> 
    <style> 
        h1 { 
            color: green; 
        } 
    </style> 
</head> 
  
<body> 
    <center> 
        <h1> 
          Geeks for Geeks 
      </h1> 
        <button onclick="openWin()"> 
          New window 
      </button> 
        <button onclick="resizeWin()"> 
          Resize window 
      </button> 
  
        <script> 
            var myWindow; 
  
            function openWin() { 
                myWindow =  
                  window.open("", "", 
                              "width=100, height=100"); 
            } 
  
            function resizeWin() { 
                myWindow.resizeBy(300, 300); 
                myWindow.focus(); 
            } 
        </script> 
    </center> 
</body> 
  
</html> 