Javascript angle direction [closed]

Question

Simple javascript angle question:

Which direction do angles go in in javascript?

Is it:

   90
180    0
   270

or

   270
180    0
   90

or something else?

I'm aware that javascript uses radians, I used degrees for illustraion.

Answer 1

On a regular unit circle, the y axis points up, so the angles increase counter-clockwise:

But in an HTML document, or the canvas element, the y axis points down, so if you increase the angle t and plot points on x, y with cos(t), sin(t), the result will be clockwise:

       270
 180          0
       90

(Live example)

As the other answers say, that's not because of how angles work in JavaScript, but because of how the coordinate space is oriented.