Do webgl has it own redner loop?

[lv2lrn4lf]

I was wondering if webgl has it own render loop... in the shadertoy what logic is looping the code? is it in the glsl environment to loop main function?

[greggman]

how many times main is called in a vertex shader is the count parameter to gl.drawArrays(primitive, offset, count)

how many times main is called in a fragment shader depends on what you draw. It's called once for each pixel

https://webglfundamentals.org/webgl/lessons/webgl-how-it-works.html