How to set the duration of animation in Text using FabricJS?

FabricJS Javascript HTML5 Canvas

In this tutorial, we are going to learn how to set the duration of an animated Text using FabricJS. We can display text on canvas by adding an instance of fabric.Text. Not only does it allow us to move, scale and change the dimensions of the text but it also provides additional functionality like text alignment, text decoration, line height which can be obtained by the properties textAlign, underline and lineHeight respectively. Similarly, we can also change the duration of animated text by using the duration property.

Syntax

animate(property: String | Object, value: Number | Object, { duration: Number })

Parameters

property − This property accepts a String or Object value which determines which properties we want to animate.
value − This property accepts a Number or Object value which determines the values to animate properties.

Options Keys

duration − This property accepts a Number. It can be used to change the duration of an animation. The default value is 500ms.

Example 1

Using default value of duration property

Let’s see a code example to see how our text object looks when the animate method is used in conjunction with the default value of duration property. In this case, animation will have a duration of 500ms.


<!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 default value of duration property</h2>
   <p>You can see that the skewY animation occurs for 500ms</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 text object
      var text = new fabric.Text("ADD SAMPLE 
text here.", {
         width: 300,
         left: 60,
         top: 70,
         fill: "#ccccff",
         stroke: "black",
         strokeWidth: 2,
         fontSize: 50,
      });

      // Using the animate method
      text.animate("skewY", "-=10", {
         onChange: canvas.renderAll.bind(canvas),
         duration: 500,
      });
      
      // Add it to the canvas
      canvas.add(text);
   </script>
</body>
</html>

Example 2

Using the animate method and passing the duration option

In this example, we will see how by using the animate property along with the duration option, we can control the duration of the animation. In this case, we have mentioned the duration as 2000ms which is why the skewY animation occurs for 2000ms.


<!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 animate method and passing the duration option</h2>
   <p>You can see that the skewY animation occurs for 2000ms</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 text object
      var text = new fabric.Text("ADD SAMPLE 
text here.", {
         width: 300,
         left: 60,
         top: 70,
         fill: "#ccccff",
         stroke: "black",
         strokeWidth: 2,
         fontSize: 50
      });

      // Using the animate method
      text.animate('skewY', '-=10', { onChange: canvas.renderAll.bind(canvas), duration: 2000 });

      // Add it to the canvas
      canvas.add(text);
   </script>
</body>
</html>

Rahul Gurung

Updated on: 14-Sep-2022

168 Views

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