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

The <vkern> SVG element allows to fine-tweak the vertical distance between two glyphs in top-to-bottom fonts. This process is known as kerning.

The Float64Array typed array represents an array of 64-bit floating point numbers in the platform byte order. If control over byte order is needed, use DataView instead. The contents are initialized to 0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).

A FinalizationRegistry object lets you request a callback when a value is garbage-collected.

The Infinity global property is a numeric value representing infinity.

The Map object holds key-value pairs and remembers the original insertion order of the keys. Any value (both objects and primitive values) may be used as either a key or a value.

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

The ReferenceError object represents an error when a variable that doesn't exist (or hasn't yet been initialized) in the current scope is referenced.

The <feBlend> SVG filter primitive composes two objects together ruled by a certain blending mode. This is similar to what is known from image editing software when blending two layers. The mode is defined by the mode attribute.

The next() method of Generator instances returns an object with two properties done and value. You can also provide a parameter to the next method to send a value to the generator.