Deprecated: This feature is no longer recommended. Though some browsers might still tư vấn it, it may have already been removed from the relevant trang web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page đồ sộ guide your decision. Be aware that this feature may cease đồ sộ work at any time.
The HTTP X-Frame-Options response header can be used đồ sộ indicate whether a browser should be allowed đồ sộ render a page in a ,