DOM manipulation convenience methods
jQuery-like methods on DOM nodes to insert nodes around or within a node, or to replace one node with another. These methods accept any number of DOM nodes or HTML strings as arguments. Includes: `ChildNode.before`, `ChildNode.after`, `ChildNode.replaceWith`, `ParentNode.prepend`, and `ParentNode.append`.
Feature Policy
This specification defines a mechanism that allows developers to selectively enable and disable use of various browser features and APIs. Feature Policy is deprecated and has been replaced with [Permissions Policy](/permissions-policy) and [Document Policy](/document-policy).
Fetch
A modern replacement for XMLHttpRequest.
Session history management
Method of manipulating the user's browser's session history in JavaScript using `history.pushState`, `history.replaceState` and the `popstate` event.
Mutation events
Deprecated mechanism for listening to changes made to the DOM, replaced by Mutation Observers.
Mutation Observer
Method for observing and reacting to changes to the DOM. Replaces MutationEvents, which is deprecated.
Scoped attribute
Deprecated method of allowing scoped CSS styles using a "scoped" attribute. Now [removed from the specification](https://github.com/whatwg/html/issues/552) and replaced by the [@scope CSS rule](/css-cascade-scope).
WebVR API
API for accessing virtual reality (VR) devices, including sensors and head-mounted displays. Replaced by the [WebXR Device API](/webxr).
animation api: replacestate
characterdata api: replacedata
characterdata api: replacewith
cssstylesheet api: replace
cssstylesheet api: replacesync
documentfragment api: replacechildren
documenttype api: replacewith
document api: replacechildren
domtokenlist api: replace
domtokenlist api: replace: `return()`'s value is a boolean, not void as it used to be.
element api: replacechildren
element api: replacewith
fetchevent api: replacesclientid
history api: replacestate
history api: replacestate: whether the `unused` parameter is used
location api: replace
navigator api: deprecatedreplaceinurn
node api: replacechild
rtcrtpsender api: `replacetrack()`
svglengthlist api: replaceitem
svgnumberlist api: replaceitem
svgpointlist api: replaceitem
svgstringlist api: replaceitem
svgtransformlist api: replaceitem
css property: content: element replacement
css property: resize: support on block level, replaced, table cell, or inline block elements
javascript built-in: regexp: @@replace
javascript built-in: string: replace
javascript built-in: string: replaceall
javascript built-in: symbol: replace
ssl (secure sockets layer)
ecmascript 2021 (es12)
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