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.
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
audiosinkinfo api
audiosinkinfo api: type
css api: `supports()` static method: parentheses for single-argument version are optional.
htmlmediaelement api: sinkid
mlgraphbuilder api: sin
processinginstruction api
processinginstruction api: sheet
processinginstruction api: target
xpathresult api: singlenodevalue
css at-rule: `@supports`: `named-feature()`: `named-feature(single-axis-scroll-container)`
css property: appearance: base-select: base styling for single dropdown: `<select>`
types: `<gradient>`: `conic-gradient()`: single color stop and 0-1 positions
types: `<gradient>`: `linear-gradient()`: single color stop and 0-1 positions
types: `<gradient>`: `radial-gradient()`: single color stop and 0-1 positions
types: `<gradient>`: `repeating-conic-gradient()`: single color stop and 0-1 positions
types: `<gradient>`: `repeating-linear-gradient()`: single color stop and 0-1 positions
types: `<gradient>`: `repeating-radial-gradient()`: single color stop and 0-1 positions
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: bigint: asintn
javascript built-in: function: [symbol.hasinstance]
javascript built-in: math: asin
javascript built-in: math: asinh
javascript built-in: math: sin
javascript built-in: math: sinh
javascript built-in: number: isinteger
javascript built-in: regexp: hasindices
javascript built-in: symbol: hasinstance
javascript built-in: temporal api: instant: since
javascript built-in: temporal api: plaindatetime: since
javascript built-in: temporal api: plaindate: since
javascript built-in: temporal api: plaintime: since
javascript built-in: temporal api: plainyearmonth: since
javascript built-in: temporal api: zoneddatetime: since
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