Fabric.js toBlackWhite() Method

0 0 1 minute read

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= 
"https://cdnjs.cloudflare.com/ajax/libs/fabric.js/3.6.2/fabric.min.js"> 
  </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= 
"https://cdnjs.cloudflare.com/ajax/libs/fabric.js/3.6.2/fabric.min.js"> 
  </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]}

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