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How to hide the controlling borders of a Circle using FabricJS?
In this tutorial, we are going to learn how to hide the controlling borders of a Circle using FabricJS. Circle is one of the various shapes provided by FabricJS. In order to create a circle, we will create an instance of fabric.Circle 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.Circle({ hasBorders: Boolean }: Object)
Parameters
-
options (optional) ? This parameter is an Object which provides additional customizations to our circle. 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 property accepts a Boolean value which when set to False, the controlling borders will not be rendered. The default value is True.
Example 1: Default Appearance of Controlling Borders
Let's see a code that shows the default appearance of controlling borders of a Circle. Since the default value of hasBorders property is True, the borders are rendered on selecting the circle 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 controlling borders of a circle using FabricJS</h2>
<p>Select the object and notice its controlling borders. This is the default appearance.</p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
var circle = new fabric.Circle({
left: 215,
top: 100,
fill: "white",
radius: 50,
stroke: "#c154c1",
strokeWidth: 5
});
// Adding it to the canvas
canvas.add(circle);
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
</script>
</body>
</html>
Example 2: Hiding Borders with hasBorders Property
If the hasBorders property is assigned a False value, the borders will no longer be rendered. This means that when we select our circle 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>Hiding the controlling borders of a circle using FabricJS</h2>
<p>Select the object and now you will no longer be able to see its controlling borders.</p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
var circle = new fabric.Circle({
left: 215,
top: 100,
fill: "white",
radius: 50,
stroke: "#c154c1",
strokeWidth: 5,
hasBorders: false
});
// Adding it to the canvas
canvas.add(circle);
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
</script>
</body>
</html>
Key Points
The hasBorders property controls the visibility of selection borders around FabricJS objects
Default value is true, showing borders when objects are selected
Setting hasBorders: false completely hides the controlling borders
This property is useful when you want a cleaner interface without visual selection indicators
Conclusion
The hasBorders property in FabricJS provides an easy way to control the visibility of selection borders around Circle objects. By setting it to false, you can create a cleaner canvas interface without the default selection indicators.
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