1. DomName('WebGLRenderingContext.blendFunc')
  2. DocsEditable()
void blendFunc(int sfactor, int dfactor)

Source 

@DomName('WebGLRenderingContext.blendFunc')
@DocsEditable()
void blendFunc(int sfactor, int dfactor) => _blink.BlinkWebGLRenderingContext.instance.blendFunc_Callback_2_(this, sfactor, dfactor);