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

A wildcard matches all characters except line terminators. It also matches line terminators if the s flag is set.

The logical NOT (!) (logical complement, negation) operator takes truth to falsity and vice versa. It is typically used with boolean (logical) values. When used with non-Boolean values, it returns false if its single operand can be converted to true; otherwise, returns true.

The in attribute identifies input for the given filter primitive.

The keySplines attribute defines a set of Bézier curve control points associated with the keyTimes list, defining a cubic Bézier function that controls interval pacing.

The in2 attribute identifies the second input for the given filter primitive. It works exactly like the in attribute.

A quantifier repeats an atom a certain number of times. The quantifier is placed after the atom it applies to.

The Promise object represents the eventual completion (or failure) of an asynchronous operation and its resulting value.

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

A word boundary assertion checks if the current position in the string is a word boundary. A word boundary is where the next character is a word character and the previous character is not a word character, or vice versa.