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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 of a Circle object
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>Hiding the controlling borders of a circle using FabricJS</h2>
<p>Select the object and notice its controlling borders. This is the default appearance. Although we have not used the <b>hasBorders</b> property, it is by default set to True.</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
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 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, as we have set <b>hasBorders</b> as False.</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>
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