OES_vertex_array_object.isVertexArrayOES()
  The OES_vertex_array_object.isVertexArrayOES() method of
  the WebGL API returns true if
  the passed object is a WebGLVertexArrayObject object.
Syntax
GLBoolean ext.isVertexArrayOES(arrayObject);
Parameters
- arrayObject
- 
    A WebGLVertexArrayObject(VAO) object to test.
Return value
  A WebGL_API.Types indicating whether the given object is a
  WebGLVertexArrayObject object (true) or not
  (false).
Examples
var ext = gl.getExtension('OES_vertex_array_object');
var vao = ext.createVertexArrayOES();
ext.bindVertexArrayOES(vao);
// ...
ext.isVertexArrayOES(vao);
Specifications
| Specification | 
|---|
| WebGL OES_vertex_array_object Khronos Ratified Extension Specification | 
Browser compatibility
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