CSS Filter Effects
Method of applying filter effects using the `filter` property to elements, matching filters available in SVG. Filter functions include blur, brightness, contrast, drop-shadow, grayscale, hue-rotate, invert, opacity, sepia and saturate.
focusin & focusout events
The `focusin` and `focusout` events fire just before the element gains or loses focus, and they bubble. By contrast, the `focus` and `blur` events fire after the focus has shifted, and don't bubble.
JSON parsing
Method of converting JavaScript objects to JSON strings and JSON back to objects using JSON.stringify() and JSON.parse()
View Transitions API (single-document)
Provides a mechanism for easily creating animated transitions between different DOM states, while also updating the DOM contents in a single step. This API is specific to single-document transitions, support for same-origin cross-document transitions is [being planned](https://github.com/WICG/view-transitions/blob/main/cross-doc-explainer.md).
DOM Parsing and Serialization
Various DOM parsing and serializing functions, specifically `DOMParser`, `XMLSerializer`, `innerHTML`, `outerHTML` and `insertAdjacentHTML`.
audiocontext api: `audiocontext()` constructor: `options.sinkid` parameter
audiocontext api: `sinkchange` event
audiocontext api: sinkid
audioprocessingevent api
audioprocessingevent api: `audioprocessingevent()` constructor
audioprocessingevent api: inputbuffer
audioprocessingevent api: outputbuffer
audioprocessingevent api: playbacktime
audiosinkinfo api
audiosinkinfo api: type
document api: browsingtopics
element api: `focusin` event
htmlmediaelement api: sinkid
mlgraphbuilder api: sin
processinginstruction api
processinginstruction api: sheet
processinginstruction api: target
scheduling api: isinputpending
svgmissingglyphelement api
xpathresult api: singlenodevalue
types: `asin()`
types: `<easing-function>`
types: `<easing-function>`: `cubic-bezier()` with ordinate ∉ [0,1]
types: `<easing-function>`: `linear()`
types: `<easing-function>`: `steps()` with `start`, `end` or no direction
types: `<easing-function>`: `steps()` with `start`, `end` or no direction: `jump-` keywords for `steps()`
types: <ratio>: accepts a single <number> as a value.
types: `sin()`
headers http header: if-modified-since
headers http header: if-unmodified-since
headers http header: range: cors-safelisted request header with single `bytes` range
javascript built-in: math: sin
javascript built-in: math: sinh
javascript built-in: temporal api: temporal.instant interface: temporal.instant.since()
javascript built-in: temporal api: temporal.plaindatetime interface: temporal.plaindatetime.since()
javascript built-in: temporal api: temporal.plaindate interface: temporal.plaindate.since()
javascript built-in: temporal api: temporal.plaintime interface: temporal.plaintime.since()
javascript built-in: temporal api: temporal.plainyearmonth interface: temporal.plainyearmonth.since()
javascript built-in: temporal api: temporal.zoneddatetime interface: temporal.zoneddatetime.since()
svg element: missing-glyph
svg element: missing-glyph: d
svg element: missing-glyph: horiz-adv-x
svg element: missing-glyph: vert-adv-y
svg element: missing-glyph: vert-origin-x
svg element: missing-glyph: vert-origin-y
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