1. @DomName('WebGL2RenderingContext.vertexAttrib1f')
  2. @DocsEditable()
  3. @Experimental()
void vertexAttrib1f(int indx, num x)

Source 

@DomName('WebGL2RenderingContext.vertexAttrib1f')
@DocsEditable()
@Experimental() // untriaged
void vertexAttrib1f(int indx, num x) =>
    _blink.BlinkWebGL2RenderingContext.instance
        .vertexAttrib1f_Callback_2_(this, indx, x);