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How to hide the controlling borders of a Rectangle using FabricJS?
In this tutorial, we are going to learn how to hide the controlling borders of a Rectangle using FabricJS. Rectangle is one of the various shapes provided by FabricJS. In order to create a rectangle, we will have to create an instance of fabric.Rect class and add it to the canvas.
We can customize our controlling borders in many ways such as adding a specific colour to it, a dash pattern, etc. However, we can also eliminate the borders completely by using the hasBorders property.
Syntax
new fabric.Rect({ hasBorders: Boolean }: Object)
Parameters
Options (optional) This parameter is an Object which provides additional customizations to our rectangle. Using this parameter, properties such as colour, cursor, stroke width and a lot of other properties can be changed related to the object of which hasBorders is a property.
Options Keys
hasBorders This propery accepts a Boolean value which when set to false, the controlling borders will not be rendered. It helps to render the controlling borders. The default value is true.
Example 1
Default appearance of controlling borders of a rectangle object
Let’s see a code example that shows the default appearance of controlling borders of a Rectangle. Since the default value of hasBorders property is True, the borders are rendered on selecting the rectangle object.
<!DOCTYPE html>
<html>
<head>
<!-- Adding the Fabric JS Library-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
<h2>Default appearance of controlling borders of a rectangle object</h2>
<p>Select the rectangle to see the default appearance of controlling borders</p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
// Initiate a rectangle object
var rect = new fabric.Rect({
left: 125,
top: 90,
width: 170,
height: 70,
strokeWidth: 3,
stroke: "#4169e1",
fill: "grey",
padding: 15,
});
// Add it to the canvas
canvas.add(rect);
</script>
</body>
</html>
Example 2
Passing hasBorders as key and assigning a “false” value to it
If the hasBorders property is assigned a false value, the borders will no longer be rendered. This means that when we select our rectangle object, the controlling borders will be hidden.
<!DOCTYPE html>
<html>
<head>
<!-- Adding the Fabric JS Library-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
<h2>Passing hasBorders as key and assigning a False value to it</h2>
<p>Select the rectangle to see that the controlling borders have now been hidden</p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
// Initiate a rectangle object
var rect = new fabric.Rect({
left: 125,
top: 90,
width: 170,
height: 70,
strokeWidth: 3,
stroke: "#4169e1",
fill: "grey",
padding: 15,
hasBorders: false,
});
// Add it to the canvas
canvas.add(rect);
</script>
</body>
</html>
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