invalidateSubFramebuffer method
      
void
invalidateSubFramebuffer()
      
     
    
The WebGL2RenderingContext.invalidateSubFramebuffer()
method of the
WebGL 2 API
invalidates
portions of the contents of attachments in a framebuffer.
Implementation
external void invalidateSubFramebuffer(
  GLenum target,
  JSArray<JSNumber> attachments,
  GLint x,
  GLint y,
  GLsizei width,
  GLsizei height,
);