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docs/kwargs.html

Keyword Arguments

Stylus supports keyword arguments, or "kwargs". These allow you to reference arguments by their associated parameter name.

The examples shown below are functionally equivalent. However, we can place keyword arguments anywhere within the list. The remaining arguments that are not keyed will be applied to the parameters that have not been satisfied.

  body {
    color: rgba(255, 200, 100, 0.5);
    color: rgba(red: 255, green: 200, blue: 100, alpha: 0.5);
    color: rgba(alpha: 0.5, blue: 100, red: 255, 200);
    color: rgba(alpha: 0.5, blue: 100, 255, 200);
  }

Yielding:

   body {
     color: rgba(255,200,100,0.5);
     color: rgba(255,200,100,0.5);
     color: rgba(255,200,100,0.5);
     color: rgba(255,200,100,0.5);
   }

To see what parameters a function or mixin accept, use the p() function:

p(rgba)

Yielding:

inspect: rgba(red, green, blue, alpha)