Assertions include boundaries, which indicate the beginnings and endings of lines and words, and other patterns indicating in some way that a match is possible (including look-ahead, look-behind, and conditional expressions).

The Object.getOwnPropertyNames() static method returns an array of all properties (including non-enumerable properties except for those which use Symbol) found directly in a given object.

The <feMerge> SVG element allows filter effects to be applied concurrently instead of sequentially. This is achieved by other filters storing their output via the result attribute and then accessing it in a <feMergeNode> child.

The bitwise XOR (^) operator returns a number or BigInt whose binary representation has a 1 in each bit position for which the corresponding bits of either but not both operands are 1.

The bbox attribute defines the maximal bounding box of a font.

BigInt values represent numeric values which are too large to be represented by the number primitive.

The SVG <text> element draws a graphics element consisting of text. It's possible to apply a gradient, pattern, clipping path, mask, or filter to <text>, like any other SVG graphics element.

The greater than or equal (>=) operator returns true if the left operand is greater than or equal to the right operand, and false otherwise.

The g2 attribute specifies a list of glyph names which identify a set of possible second glyphs in the kerning pair.

The attributeType attribute specifies the namespace in which the target attribute and its associated values are defined.