Given an image and the task is to increase and decrease the image size using JavaScript. Use the following property to increase and decrease the image.
Using Width property: It is used to change the new values to resize the width of the element.
Syntax:
object.style.width = "auto|length|%|initial|inherit"
Approach:
- Get the selector of the required image using .getElementById(selector).
- Store the current width value in the variable using .clientWidth.
- Now change the width value to new using .style.width.
- It will proportionally increase and decrease the dimension of an image.
Example:
<!DOCTYPE html>
<html>
<head>
<title>
How to zoom-in and zoom-out
image using JavaScript ?
</title>
<script src=
</script>
</head>
<body style="text-align:center;">
<h1 style = "color:green;" >
GeeksForGeeks
</h1>
<h3>
JavaScript | Increase and
Decrease image size
</h3>
<hr>
<div class="box">
<img src=
id="geeks" GFG="250" alt="Geeksforgeeks">
</div>
<hr>
<button type="button" onclick="zoomin()">
Zoom-In
</button>
<button type="button" onclick="zoomout()">
Zoom-Out
</button>
<script type="text/javascript">
function zoomin() {
var GFG = document.getElementById("geeks");
var currWidth = GFG.clientWidth;
GFG.style.width = (currWidth + 100) + "px";
}
function zoomout() {
var GFG = document.getElementById("geeks");
var currWidth = GFG.clientWidth;
GFG.style.width = (currWidth - 100) + "px";
}
</script>
</body>
</html>
|
Output:
- Before click on button:
- After click on Zoom-In Button:
- After click on Zoom-Out Button:
Using Height property: It is used to change the new values to resize the height of the element.
Syntax:
object.style.height = "auto|length|%|initial|inherit"
Approach:
- Get the selector of the required image using .getElementById(selector).
- Store the current height value in the variable using .clientHeight.
- Now change the width value to new using .style.height.
- It will proportionally increase and decrease the dimension of an image.
Example:
<!DOCTYPE html>
<html>
<head>
<title>
How to zoom-in and zoom-out
image using JavaScript ?
</title>
<script src=
</script>
</head>
<body style="text-align:center;">
<h1 style = "color:green;" >
GeeksForGeeks
</h1>
<h3>
JavaScript | Increase and
Decrease image size
</h3>
<hr>
<div class="box">
<img src=
id="geeks" GFG="250" alt="Geeksforgeeks">
</div>
<hr>
<button type="button" onclick="zoomin()">
Zoom-In
</button>
<button type="button" onclick="zoomout()">
Zoom-Out
</button>
<script type="text/javascript">
function zoomin() {
var GFG = document.getElementById("geeks");
var currHeight = GFG.clientHeight;
GFG.style.height = (currHeight + 40) + "px";
}
function zoomout() {
var GFG = document.getElementById("geeks");
var currHeight = GFG.clientHeight;
GFG.style.height = (currHeight - 40) + "px";
}
</script>
</body>
</html>
|
Output:
- Before click on button:
- After click on Zoom-In Button:
- After click on Zoom-Out Button:
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Last Updated :
20 Sep, 2019
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