Having issues with the latest version of Fabric JS code running properly

Hello, I stumbled upon this JS fiddle (http://jsfiddle.net/efmbrm4v/2/) and I really need something similar to function properly. The fiddle uses an older version of fabric js (1.4.0) and I'm having trouble getting it to work with the newer versions (4.4.0). In the new version, the uploaded image doesn't stay within the created clippingRect; instead, it is visible on the entire canvas. I specifically need it to remain visible only within the clippingRect object. Does anyone have any ideas on what changes need to be made in the code to make it compatible with the latest version? Thank you in advance.

Below is the code snippet from the fiddle:

$(document).ready(function() {
    var imageLoader = document.getElementById('imageLoader');
    imageLoader.addEventListener('change', handleImage, false);
});

var canvas = new fabric.Canvas('myCanvas');

var clippingRect = new fabric.Rect({
    left: 100,
    top: 100,
    width: 100,
    height: 100,
    fill: '#DDD',
    opacity: 1,
    selectable: false
});
canvas.add(clippingRect);

function handleImage(e) {
    var reader = new FileReader();
    reader.onload = function(event) {
        var img = new Image();
        img.onload = function() {

            var instanceWidth, instanceHeight;

            instanceWidth = img.width;
            instanceHeight = img.height;

            var imgInstance = new fabric.Image(img, {
                width: instanceWidth,
                height: instanceHeight,
                top: (canvas.getHeight() / 2 - instanceHeight / 2),
                left: (canvas.getWidth() / 2 - instanceWidth / 2),
                originX: 'left',
                originY: 'top'
            });
            canvas.add(imgInstance);
            imgInstance.clipTo = function(ctx) {
                ctx.save();
                ctx.setTransform(1, 0, 0, 1, 0, 0);
                
                clippingRect.render(ctx);
                
                ctx.restore();
            };
            canvas.renderAll();
        };
        img.src = event.target.result;
    };
    reader.readAsDataURL(e.target.files[0]);
}
<canvas id="myCanvas" width="400" height="300" style="border: 1px solid black"></canvas>
<br />
<label>Choose a File:</label>
<br/>
<br />
<input type="file" id="imageLoader" name="imageLoader" />
<script src="//code.jquery.com/jquery-1.11.0.min.js"></script>

Answer №1

The example linked here demonstrates the use of Fabric's previous clipTo method, which has been replaced by the more efficient and robust clipPath system.

For a comprehensive understanding of how to clip objects using clipPaths, check out this 4-part tutorial series:

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