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How to create a canvas with text cursor using FabricJS?
In this article, we are going to create a canvas with a text cursor using FabricJS. A text cursor indicates text which can be selected. The text cursor is one of the native cursor styles available which can be used in the FabricJS canvas. FabricJS provides various types of cursors like default, all-scroll, crosshair, col-resize, row-resize, etc., that reuse the native cursor under the hood. Each of these cursors look slightly different based on operating system.
Syntax
new fabric.Canvas(element: HTMLElement|String, { defaultCursor: String }: Object)
Parameters
-
element ? This parameter is the <canvas> element itself which can be derived using document.getElementById() or the id of the <canvas> element itself. The FabricJS canvas will be initialized on this element.
-
options (optional) ? This parameter is an Object which provides additional customizations to our canvas. Using this parameter color, cursor, border width and a lot of other properties can be changed related to the canvas, of which defaultCursor is a property with which we can set the type of cursor.
Example 1: Basic Text Cursor
The defaultCursor property accepts a String which determines the name of the cursor to be used on the canvas. We will set it to "text" to use the text cursor. Let's see a code to create a canvas with a text cursor in FabricJS.
<!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>Canvas with text cursor using FabricJS</h2>
<p>Bring the cursor inside the canvas to see the changed shape of cursor</p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas", {
defaultCursor: "text"
});
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
</script>
</body>
</html>
Output: When you hover over the canvas, the cursor will change to a text cursor (I-beam shape), indicating that text can be selected or edited in that area.
Example 2: Text Cursor with Canvas Object
In this example, we will add a circle to the canvas along with the text cursor to demonstrate how the cursor behavior works with canvas objects.
<!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>Canvas with text cursor using FabricJS</h2>
<p>Here we have added a circle to the canvas along with a text cursor</p>
<canvas id="canvas"></canvas>
<script>
//Initiate a canvas instance
var canvas = new fabric.Canvas("canvas", {
defaultCursor: "text"
});
// Initiate a Circle instance
var circle = new fabric.Circle({
radius: 50,
fill: "green"
});
// Render the circle in canvas
canvas.add(circle);
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
</script>
</body>
</html>
Output: The canvas displays a green circle, and when you hover over the empty areas of the canvas, the cursor appears as a text cursor. When hovering over the circle object, the cursor may change to indicate object interaction.
Key Points
- The
defaultCursorproperty sets the cursor style for the entire canvas area - The text cursor appears as an I-beam shape, commonly used for text selection
- Individual objects on the canvas may override the default cursor when hovered
- This feature is useful when creating text editing applications or interfaces
Conclusion
Setting a text cursor on a FabricJS canvas is straightforward using the defaultCursor property. This provides visual feedback to users that the canvas area is intended for text-related interactions, making it particularly useful for text editing applications.
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