![]() What happens when frame-ancestors blocks something? ![]() No, the frame-ancestors does not inherit from the default-src directive, you need to explicitly specify it in your Content-Security-Policy header. ![]() Is frame-ancestors covered by the default-src directive? It must be specified as part of a Content-Security-Policy header. No, you cannot use the frame-ancestors directive from a Content-Security-Policy meta tag. Can frame-ancestors be used in a meta tag? In addition to frame and iframe the frame-ancestors directive also applies to applet, embed and objecttags. Now suppose we want to allow and to frame our page, we can specify it with frame-ancestors like this: frame-ancestors What HTML elements does frame-ancestors apply to? Using frame-ancestors 'self' is similar to using X-Frame-Options: sameorigin In this case you can use: frame-ancestors 'self' Now suppose you want to allow a page to be framed, for example within an iframe, but only from the same site (same origin). Specifically this means that the given URI cannot be framed inside a frame or iframe tag. Using frame-ancestors 'none' is similar to using X-Frame-Options: deny. The most common way to use the frame-ancestors directive is to block a page from being framed by other pages. Using the frame-ancestors CSP directive we can block or allow a page from being placed within a frame or iframe. The frame-ancestors directive allows you to specify which parent URLs can frame the current resource.
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