The parseInt() function parses a string argument and returns an integer of the specified radix (the base in mathematical numeral systems).

This chapter documents all of JavaScript's standard, built-in objects, including their methods and properties.

The dur attribute indicates the simple duration of an animation.

The RegExp object is used for matching text with a pattern.

The <script> SVG element allows to add scripts to an SVG document.

The diffuseConstant attribute represents the kd value in the Phong lighting model. In SVG, this can be any non-negative number.

The isNaN() function determines whether a value is NaN, first converting the value to a number if necessary. Because coercion inside the isNaN() function can be surprising, you may prefer to use Number.isNaN().

The BigUint64Array typed array represents an array of 64-bit unsigned integers in the platform byte order. If control over byte order is needed, use DataView instead. The contents are initialized to 0n unless initialization data is explicitly provided. 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).

Private elements are counterparts of the regular class elements which are public, including class fields, class methods, etc. Private elements get created by using a hash # prefix and cannot be legally referenced outside of the class. The privacy encapsulation of these class elements is enforced by JavaScript itself. The only way to access a private element is via dot notation, and you can only do so within the class that defines the private element.

Classes are a template for creating objects. They encapsulate data with code to work on that data. Classes in JS are built on prototypes but also have some syntax and semantics that are unique to classes.