We are having many image cropping plugins developed in jquery that are being used to crop an image. Jcrop is one of the plugins developed in Jquery. Jcrop is very easy to learn. In the current blog post we’ll see how to use Jcrop to crop an image.

We will take the following image tag to see how jcrop is used.

<img id="target" src="pool.jpg" />

Download the latest version of JCrop.js and Jcrop.css and keep them in your html file as below.

<script src="js/jquery.min.js"></script>
<script src="js/jquery.Jcrop.min.js"></script>
<link href="css/jquery.Jcrop.css" rel="stylesheet" type="text/css" />

Initialise the Jcrop with the image tag as follows.

jQuery(function($) {
   $('#target').Jcrop();
});

With the above snippet will convert the image tag into a widget to crop the image.

Useful Attributes and Events in Jcrop:

Attributes:

1. aspectRatio: Aspect ratio of w/h (e.g. 1 for square) this will keep the aspect ratio for the selected area in the image.
2. minSize, maxSize: These two will keep the minimum and maximum cropping sizes of the image respectively. 

Events:

1. onSelect: This is called when the selection is completed.
2. onRelease: This is called when the selected area is released.
3. onChange: This is called when the selection is moving.

All the above 3 events  will give the coordinates of the selected area like width, height, x-coordinate...etc., 

Here is the complete example of how the above attributes and events used.

<script language="Javascript">

    function selectedCoordinates(c)
     {
      // variables can be accessed here as
      // c.x, c.y, c.x2, c.y2, c.w, c.h
    };

    function changingCoordinates(c)
     {
      // variables can be accessed here as
      // c.x, c.y, c.x2, c.y2, c.w, c.h
    };

    function finalCoordinates(c)
     {
      // variables can be accessed here as
      // c.x, c.y, c.x2, c.y2, c.w, c.h
    };

    jQuery(function($) {

        $('#target').Jcrop({
            onSelect: selectedCoordinates,
            onChange: changingCoordinates,
            onRelease: finalCoordinates,
            aspectRatio: 2 / 3,
            minSize: [2,100],
            maxSize: [500, 750]
        });
    });

</script>

Subscribe To our news letter

Subscribe to our news letter to receive latest blog posts into your inbox. Please fill your email address in the below form.
*We don't provide your email contact details to any third parties
Latest Comments
Related Articles
Get tweets with Javascript Ashwin Kumar

Due to change in twitter API, its been hard to get tweets from twitter to your site using javascript. We got new API version 1.1 ...

Continue Reading...
Copy to ClipBoard event using Javascript Swetha Naretla

Here you can learn about copy to clipboard using JavaScript. Copying content from a web form without needing to use the default browser functions. For ...

Continue Reading...
jQuery mouse events and touch events Vidyasagar Rudraram

jQuery is a fast, small, and feature-rich JavaScript library. It makes things like HTML document traversal and manipulation, event handling, animation, and Ajax much simpler ...

Continue Reading...