sandbox attribute for iframes
Method of running external site pages with reduced privileges (e.g. no JavaScript) in iframes.
seamless attribute for iframes
The seamless attribute makes an iframe's contents actually part of a page, and adopts the styles from its hosting page. The attribute has been removed from both [the WHATWG](https://github.com/whatwg/html/issues/331) and [the W3C](https://github.com/w3c/html/pull/325) HTML5 specifications.
srcdoc attribute for iframes
Override the content specified in the `src` attribute (if present) with HTML content within the attribute.
Lazy loading via attribute for images & iframes
The `loading` attribute on images & iframes gives authors control over when the browser should start loading the resource.
requestAnimationFrame
API allowing a more efficient way of running script-based animation, compared to traditional methods using timeouts. Also covers support for `cancelAnimationFrame`
WebTransport
Protocol framework to send and receive data from servers using [HTTP3](/http3). Similar to [WebSockets](/websockets) but with support for multiple streams, unidirectional streams, out-of-order delivery, and reliable as well as unreliable transport.
X-Frame-Options HTTP header
An HTTP header which indicates whether the browser should allow the webpage to be displayed in a frame within another webpage. Used as a defense against clickjacking attacks.
client api: frametype
htmltableelement api: frame
imagetrack api: framecount
mediatrackconstraints api: framerate
mediatracksettings api: framerate
mediatracksupportedconstraints api: framerate
ovr_multiview2 api: framebuffertexturemultiviewovr
vrframedata api
vrframedata api: pose
webgl2renderingcontext api: framebufferrenderbuffer
webgl2renderingcontext api: framebuffertexture2d
webgl2renderingcontext api: framebuffertexturelayer
webglrenderingcontext api: framebufferrenderbuffer
webglrenderingcontext api: framebuffertexture2d
window api: frameelement
window api: frames
xrframe api
xrframe api: fillposes
xrframe api: `getpose()`
xrframe api: session
xrinputsourceevent api: frame
xrwebgllayer api: framebuffer
xrwebgllayer api: framebufferheight
xrwebgllayer api: framebufferwidth
html element: frame
html element: frameset
html element: frameset: cols
html element: frameset: rows
html element: frame: frameborder
html element: frame: marginheight
html element: frame: marginwidth
html element: frame: name
html element: frame: noresize
html element: frame: scrolling
html element: frame: src
html element: table: frame
headers http header: content-security-policy: frame-ancestors
headers http header: content-security-policy: frame-src
headers http header: x-frame-options
headers http header: x-frame-options: allow-from
headers http header: x-frame-options: sameorigin
the vue.js framework
the bootstrap framework
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