JavaScript: Get the width and height of a window online

Last update on May 30 2022 10:00:30 (UTC/GMT +8 hours)

JavaScript DOM: Exercise-13 with Solution

Write a JavaScript program to get the width and height of the window (any time the window is resized).

Sample Solution: -

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Window Size : height and width</title>
</head>
<!-- Resize the window (here output panel) and see the result !-->
<body onload="getSize()" onresize="getSize()">
<div id="wh"> 
<!-- Place height and width size here! --> 
</div>
<body>
</body>
</html>

JavaScript Code:

function getSize()
{
var w = document.documentElement.clientWidth;
var h = document.documentElement.clientHeight;
        
// put the result into a h1 tag
 document.getElementById('wh').innerHTML = "<h1>Width: " + w + " â€¢ Height: " + h + "</h1>";
}

Sample output:

Flowchart:

Live Demo:

See the Pen javascript-dom-exercise-13 by w3resource (@w3resource) on CodePen.

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JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai Jim";
arr[4] = "Borge";

console.log(arr.join());
arr.splice(2, 0, "Lene");
console.log(arr.join());

Ref: https://bit.ly/2BXbp04