How to increase and decrease image size using JavaScript

  183 views   3 months ago Javascript

Use the JavaScript width and height property

You can use either width or height JavaScript property to proportionally increase and decrease the dimension of an image like zoom-in and zoom-out feature.

Let's take a look at the following example to understand how it basically works:

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JavaScript Increasing and Decreasing Image Size</title>
<script>
    function zoomin(){
        var myImg = document.getElementById("sky");
        var currWidth = myImg.clientWidth;
        if(currWidth == 500){
            alert("Maximum zoom-in level reached.");
        } else{
            myImg.style.width = (currWidth + 50) + "px";
        } 
    }
    function zoomout(){
        var myImg = document.getElementById("sky");
        var currWidth = myImg.clientWidth;
        if(currWidth == 50){
            alert("Maximum zoom-out level reached.");
        } else{
            myImg.style.width = (currWidth - 50) + "px";
        }
    }
</script>
</head>
<body>
    <p>
        <button type="button" onclick="zoomin()">Zoom In</button>
        <button type="button" onclick="zoomout()">Zoom Out</button>
    </p>
    <img src="sky.jpg" id="sky" width="250" alt="Cloudy Sky">
</body>
</html>

 

Author : Harsukh Makwana
Harsukh Makwana

Hi, My name is Harsukh Makwana. i have been work with many programming language like php, python, javascript, node, react, anguler, etc.. since last 5 year. if you have any issue or want me hire then contact me on harsukh21@gmail.com

Related Articles