1. DomName('WebGLRenderingContext.vertexAttrib3fv')
  2. DocsEditable()
void vertexAttrib3fv(int indx, Float32List values)

Source 

@DomName('WebGLRenderingContext.vertexAttrib3fv')
@DocsEditable()
void vertexAttrib3fv(int indx, Float32List values) => _blink.BlinkWebGLRenderingContext.instance.vertexAttrib3fv_Callback_2_(unwrap_jso(this), indx, values);