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How to create a string representation of an image object using FabricJS?
How to create a string representation of an image object using FabricJS?
In this tutorial we will show you how to create a string representation Image object using FabricJS. We can create an Image object by creating an instance fabric.image. Since it is one of the basic elements of FabricJS, we can also easily Customize it by applying properties such as angle, opacity, and more. To create a string For representation of Image objects, we use the toString method.
grammar
toString(): String
Use toStringmethod
Example
Let's look at a code example to see the output logged when using the toString method. exist In this case, a string representation of the image instance is returned.
<!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>Using the toString method</h2>
<p>
You can open console from dev tools and see that the logged output contains the String representation of the image instance
</p>
<canvas id="canvas"></canvas>
<img
src="https://www.tutorialspoint.com/images/logo.png"
id="img1"
style="display: none"
/>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
// Initiating the image element
var imageElement = document.getElementById("img1");
// Initiate an Image object
var image = new fabric.Image(imageElement, {
top: 50,
left: 110,
});
// Add it to the canvas
canvas.add(image);
// Using the toString method
console.log(
"String representation of the Image instance is: ",
image.toString()
);
</script>
</body>
</html>
Use the toString method to compare two different elements
Example
Let’s look at a code example to see how to compare two objects by looking at them respective string representation. Here we initialize an Image instance and an Rectangle instance. When applying the toString method to each object, we can see their The respective string representation in the console.
<!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>Using toString method to compare two different elements</h2>
<p>
You can open console from dev tools and see that the logged output contains the String representation of the Image instance and the rectangle instance
</p>
<canvas id="canvas"></canvas>
<img src="https://www.tutorialspoint.com/images/logo.png" id="img1" style="display: none" />
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
// Initiating the image element
var imageElement = document.getElementById("img1");
// Initiate an Image object
var image = new fabric.Image(imageElement, {
top: 50,
left: 110,
});
// Initiate a Rectangle object
var rect = new fabric.Rect({
stroke: "red",
strokeWidth: 20,
width: 20,
height: 50,
left: 460,
top: 55,
});
// Add them to the canvas
canvas.add(image);
canvas.add(rect);
// Using the toString method
console.log(
"String representation of the Image instance is: ",
image.toString()
);
console.log(
"String representation of the Rectangle instance is: ",
rect.toString()
);
</script>
</body>
</html>
in conclusion
In this tutorial, we use two examples to demonstrate how to create a string Use FabricJS to represent Image objects.
The above is the detailed content of How to create a string representation of an image object using FabricJS?. For more information, please follow other related articles on the PHP Chinese website!
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