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Fabric.js line lockMovementY Property

Last Updated : 22 Jan, 2021
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In this article, we are going to see if the option set to true will lock the vertical movement in a canvas line in FabricJS. The canvas line means the line is movable and can be stretched according to requirement. Further, the line can be customized when it comes to initial stroke color, height, width, fill color, or stroke width.

Syntax:

fabric.line({
    lockMovementY : boolean
});

Approach: To make this possible we are going to use a JavaScript library called FabricJS. After importing the library, we will create a canvas block in the body tag which will contain the line. After this, we will initialize instances of Canvas and line provided by FabricJS and see if the option set to true will lock the vertical movement in the canvas line using lockMovementY Property, and render the line on the Canvas as given below.

Parameters: This function accepts a single parameter as mentioned above and described below:

  • lockMovementY: It specifies if the option set to true will lock the vertical movement. It contains a boolean value.

Example1:

HTML




<!DOCTYPE html> 
<html
<head>  
   <script src
   </script
</head
<body
   <h1>fabric.js | line lockMovementY property</h1>
     
   <canvas id="canvas" width="600" height="200"
      style="border:1px solid #000000;"
   </canvas
     
   <script>         
      // Initiate a Canvas instance 
      var canvas = new fabric.Canvas("canvas");        
      // Initiate a line instance 
      var line = new fabric.Line([150, 10, 220, 150], { 
         stroke: 'green',
         lockMovementY : true
      }); 
      // Render the line in canvas 
      canvas.add(line); 
  </script>
    
</body
</html


Output:

lockMovementY = true

Example2:

HTML




<!DOCTYPE html> 
<html
<head>  
   <script src
   </script
</head
<body
   <h1>fabric.js | line lockMovementY property</h1>
     
   <canvas id="canvas" width="600" height="200"
      style="border:1px solid #000000;"
   </canvas
     
   <script>         
      // Initiate a Canvas instance 
      var canvas = new fabric.Canvas("canvas");        
      // Initiate a line instance 
      var line = new fabric.Line([150, 10, 220, 150], { 
         stroke: 'green',
         lockMovementY : false
      }); 
      // Render the line in canvas 
      canvas.add(line); 
  </script>
    
</body
</html


Output:

lockMovementY = false



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