1. DomName('WebGLRenderingContext.stencilFunc')
  2. DocsEditable()
void stencilFunc(int func, int ref, int mask)

Source 

@DomName('WebGLRenderingContext.stencilFunc')
@DocsEditable()
void stencilFunc(int func, int ref, int mask) => _blink.BlinkWebGLRenderingContext.instance.stencilFunc_Callback_3_(this, func, ref, mask);