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 unary plus (+) operator precedes its operand and evaluates to its operand but attempts to convert it into a number, if it isn't already.

The parseFloat() function parses a string argument and returns a floating point number.

This chapter documents all the JavaScript language operators, expressions and keywords.

The azimuth attribute specifies the direction angle for the light source on the XY plane (clockwise), in degrees from the x axis.

The await operator is used to wait for a Promise and get its fulfillment value. It can only be used inside an async function or at the top level of a module.

The encodeURI() function encodes a URI by replacing each instance of certain characters by one, two, three, or four escape sequences representing the UTF-8 encoding of the character (will only be four escape sequences for characters composed of two surrogate characters). Compared to encodeURIComponent(), this function encodes fewer characters, preserving those that are part of the URI syntax.

The <path> element is the most powerful element in the SVG library of basic shapes. It can be used to create lines, curves, arcs, and more.

The <textPath> SVG element is used to render text along the shape of a <path> element. The text must be enclosed in the <textPath> element and its href attribute is used to reference the desired <path>.

The font-variant attribute indicates whether the text is to be rendered using variations of the font's glyphs.