How to add a dashed stroke to a rectangle using FabricJS?
In this tutorial, we will learn how to add a dashed stroke to a rectangle using FabricJS. Rectangle is one of the various shapes provided by FabricJS. In order to create a rectangle, we must create an instance of the Fabric.Rect class and add it to the canvas. The StrokeDashArray property allows us to specify a dash pattern for the object's strokes.
Syntax
new fabric.Rect( { strokeDashArray: Array }: Object)Parameters
Options (optional) - This parameter is a ## that provides additional customization #Object to our rectangle. Using this parameter, you can change the color, cursor, stroke width, and many other properties associated with the object for which StrokeDashArray is a property.
StrokeDashArray - This property allows us to specify a dash pattern for the object's strokes. We can do this by passing it an array. For example, if we pass an array with values [2,3], it represents a dash pattern of 2px dashes and 3px gaps, and this pattern repeats infinitely.
Default appearance of object strokes
Let's look at an example describing the default appearance of a rectangular object stroke Code examples. Since we are not using theStrokeDashArray property, the dash pattern is not displayed.
<!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 an object’s stroke</h2>
<p>You can see that there is no dashed stroke on the rectangle</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: 55,
top: 70,
width: 170,
height: 70,
fill: "#f4f0ec",
stroke: "#2a52be",
strokeWidth: 7,
});
// Add it to the canvas
canvas.add(rect);
</script>
</body>
</html>Passing the StrokeDashArray property as a key
In this example, we pass a The value is [9,2]. This means that a dashed pattern will be created with a 9 pixel long line followed by a 2 pixel long gap, then again a 9 pixel long line will be drawn, and so on.<!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 strokeDashArray property as key</h2>
<p>You can see now a dashed stroke has been added around the rectangle</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: 55,
top: 70,
width: 170,
height: 70,
fill: "#f4f0ec",
stroke: "#2a52be",
strokeWidth: 7,
strokeDashArray: [9, 2],
});
// Add it to the canvas
canvas.add(rect);
</script>
</body>
</html>The above is the detailed content of How to add a dashed stroke to a rectangle using FabricJS?. For more information, please follow other related articles on the PHP Chinese website!
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