The color.opacity in D3.js is used to fade the color. The opacity value is in the range of [0, 1].
Syntax:
color.opacity
Parameters: This function does not accept any parameters.
Return Value: This function returns the opacity value of the specified color.
Below program illustrate the color.opacity function in D3.js:
Example:
<!DOCTYPE html> <html> <head> <title>color.rgb() function</title> </script> </head> <body> <script> // Calling the d3.color() function // with some parameters var color1 = d3.color("red"); var color2 = d3.color("green"); var color3 = d3.color("blue"); // Calling the color.opacity var A = color1.opacity; var B = color2.opacity; var C = color3.opacity; // Getting the opacity value console.log(A); console.log(B); console.log(C); </script> </body> </html> |
Output:
1 1 1
Ref: https://devdocs.io/d3~5/d3-color#color_opacity
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