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Fabric.js toBlackWhite() Method

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The toBlackWhite() method is used to convert any type of the specified color representation to it’s black and white representation.

Syntax:

toBlackWhite(threshold)

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

  • threshold: This parameter holds the specified threshold value.

Return Value: This method returns color representation in it’s black and white representation.

Example 1:

Javascript




<!DOCTYPE html>
<html>
  
<head>
  <!-- Adding the FabricJS library -->
  <script src=
  </script>
</head>
  
<body>
<script type="text/javascript">
  
 // Calling the toBlackWhite() function over 
 // the specified color values
 console.log(new fabric.Color("hsl(0, 100%, 50%)").toBlackWhite(0));
 console.log(new fabric.Color("hsla(10, 40%, 53%, 0.6)").toBlackWhite(1));
</script>
  
</body>
  
</html>


Output:

{"_source":[0,0,0,1]}
{"_source":[255,255,255,0.6]}

Example 2:

Javascript




<!DOCTYPE html>
<html>
  
<head>
  <!-- Adding the FabricJS library -->
  <script src=
  </script>
</head>
  
<body>
<script type="text/javascript">
  
 // Initializing some color values in different color format
 var A = "hex(fff00f)";
 var B = "hsl(12, 13%, 25%)";
 var C = "hsla(10, 40%, 13%, 0.6)";
 var D = "rgb(10, 40, 13)";
  
 // Calling the toBlackWhite() function over 
 // the above specified color values
 console.log(new fabric.Color(A).toBlackWhite());
 console.log(new fabric.Color(B).toBlackWhite(0));
 console.log(new fabric.Color(C).toBlackWhite(1));
 console.log(new fabric.Color(D).toBlackWhite(2));
</script>
  
</body>
  
</html>


Output:

{"_source":[0,0,0,1]}
{"_source":[0,0,0,1]}
{"_source":[255,255,255,0.6]}
{"_source":[255,255,255,1]}


Last Updated : 19 Mar, 2021
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