CSS Backdrop Filter
Method of applying filter effects (like blur, grayscale or hue) to content/elements below the target element.
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.
CSS Initial Letter
Method of creating an enlarged cap, including a drop or raised cap, in a robust way.
Dialog element
Method of easily creating custom dialog boxes to display to the user with modal or non-modal options. Also includes a `::backdrop` pseudo-element for behind the element.
Drag and Drop
Method of easily dragging and dropping elements on a page, requiring minimal JavaScript.
datatransfer api: dropeffect
element api: pseudo: `type` parameter: `"::backdrop"` value
eyedropper api
eyedropper api: `eyedropper()` constructor
eyedropper api: open
eyedropper api: secure context required
htmlelement api: `drop` event
observable api: drop
performanceobserver api: `performanceobserver()` constructor: `droppedentriescount()` parameter
svgfedropshadowelement api
svgfedropshadowelement api: dx
svgfedropshadowelement api: dy
svgfedropshadowelement api: height
svgfedropshadowelement api: in1
svgfedropshadowelement api: result
svgfedropshadowelement api: setstddeviation
svgfedropshadowelement api: stddeviationx
svgfedropshadowelement api: stddeviationy
svgfedropshadowelement api: width
svgfedropshadowelement api: x
svgfedropshadowelement api: y
videoplaybackquality api: droppedvideoframes
css at-rule: `@font-face`: src: drop invalid item (not src string)
css property: appearance: base-select: base styling for multiple dropdown: `<select multiple size="1">`
css property: appearance: base-select: base styling for single dropdown: `<select>`
css property: backdrop-filter: none
css property: cursor: no-drop
css property: filter: drop-shadow
css selector: `::backdrop`
css selector: `::backdrop`: support on `dialog` elements
css selector: `::backdrop`: fullscreen support
css selector: `::backdrop`: backdrop elements inherit their values from its originating element
css selector: `::backdrop`: support on popovers
types: `<filter-function>`: `drop-shadow()`
javascript built-in: iterator: drop
svg element: fedropshadow
svg element: fedropshadow: dx
svg element: fedropshadow: dy
svg element: fedropshadow: in
svg element: fedropshadow: stddeviation
instructions: data.drop
instructions: drop
instructions: elem.drop
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