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How to hide the controlling borders of a Triangle using FabricJS?
In this tutorial, we are going to learn how to hide the controlling borders of a Triangle using FabricJS. Triangle is one of the various shapes provided by FabricJS. In order to create a triangle, we will have to create an instance of fabric.Triangle 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. We can also eliminate the borders completely by using the hasBorders property.
Syntax
new fabric.Triangle({ hasBorders: Boolean }: Object)Parameters
Options (optional) − This parameter is an Object which provides additional customizations to our Triangle. 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 helps to render the controlling borders. 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 triangle object
Let's see a code example that shows the default appearance of controlling borders of a Triangle. Since the default value of hasBorders property is True, the borders are rendered on selecting the triangle 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 the controlling borders of a triangle object</h2>
<p>Select the triangle to see its 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 triangle object
var triangle = new fabric.Triangle({
left: 105,
top: 75,
width: 90,
height: 80,
fill: "#ff878d",
stroke: "#674846",
strokeWidth: 5,
});
// Add it to the canvas
canvas.add(triangle);
</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 triangle 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 it "false"</h2>
<p>Select the triangle and observe that its controlling borders have not been rendered.</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 triangle object
var triangle = new fabric.Triangle({
left: 105,
top: 75,
width: 90,
height: 80,
fill: "#ff878d",
stroke: "#674846",
strokeWidth: 5,
hasBorders: false,
});
// Add it to the canvas
canvas.add(triangle);
</script>
</body>
</html>
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