The <filter> SVG element defines a custom filter effect by grouping atomic filter primitives. It is never rendered itself, but must be used by the filter attribute on SVG elements, or the filter CSS property for SVG/HTML elements.

The <circle> SVG element is an SVG basic shape, used to draw circles based on a center point and a radius.

The <cursor> SVG element can be used to define a platform-independent custom cursor. A recommended approach for defining a platform-independent custom cursor is to create a PNG image and define a cursor element that references the PNG image and identifies the exact position within the image which is the pointer position (i.e., the hot spot).

JavaScript Date objects represent a single moment in time in a platform-independent format. Date objects encapsulate an integral number that represents milliseconds since the midnight at the beginning of January 1, 1970, UTC (the epoch).

The bitwise NOT (~) operator returns a number or BigInt whose binary representation has a 1 in each bit position for which the corresponding bit of the operand is 0, and a 0 otherwise.

The cap-height attribute defines the height of uppercase glyphs of the font within the font coordinate system.

The clip attribute is a presentation attribute defining the visible region of an element.

The alphabetic attribute defines the lower baseline of a font. It has the same syntax and semantics as the baseline descriptor within an @font-face.

The division assignment (/=) operator performs division on the two operands and assigns the result to the left operand.

The bitwise AND (&) operator returns a number or BigInt whose binary representation has a 1 in each bit position for which the corresponding bits of both operands are 1.