1. @DomName('WebGLRenderingContext.vertexAttrib3f')
  2. @DocsEditable()
void vertexAttrib3f(int indx, num x, num y, num z)

Source 

@DomName('WebGLRenderingContext.vertexAttrib3f')
@DocsEditable()
void vertexAttrib3f(int indx, num x, num y, num z) =>
    _blink.BlinkWebGLRenderingContext.instance
        .vertexAttrib3f_Callback_4_(this, indx, x, y, z);