The setAlpha() method is used to set the value of alpha channel for the specified color.
Syntax:
setAlpha(alpha)
Parameters: This method accepts a parameter as mentioned above and described below:
- alpha: This parameter holds the specified alpha channel value.
Return Value: This method returns specified color value in the format of RGBA along with the given alpha channel value.
Example 1:
HTML
<!DOCTYPE html> <html>   <head>   <!-- Adding the FabricJS library -->  <script src=   </script> </head>   <body> <script type="text/javascript">    // Calling the setAlpha() function over  // the specified color values  console.log(new fabric.Color("hsl(0, 100%, 50%)").setAlpha(0.4)); </script>   </body>   </html> |
Output:
{"_source":[255,0,0,0.4]}
Example 2:
HTML
<!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)";  var E = "rgba(10, 40, 13, 0.9)";    // Calling the setAlpha() function over  // the above specified color values  console.log(new fabric.Color(A).setAlpha(0));  console.log(new fabric.Color(B).setAlpha(0.4));  console.log(new fabric.Color(C).setAlpha(0.2));  console.log(new fabric.Color(D).setAlpha(0.7));  console.log(new fabric.Color(E).setAlpha(0.9)); </script>   </body>   </html> |
Output:
{"_source":[0,0,0,0]}
{"_source":[72,59,55,0.4]}
{"_source":[46,24,20,0.2]}
{"_source":[10,40,13,0.7]}
{"_source":[10,40,13,0.9]}
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