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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