JavaScript is a prototype-based language — an object's behaviors are specified by its own properties and its prototype's properties. However, with the addition of classes, the creation of hierarchies of objects and the inheritance of properties and their values are much more in line with other object-oriented languages such as Java. In this section, we will demonstrate how objects can be created from classes.

The decodeURI() function decodes a Uniform Resource Identifier (URI) previously created by encodeURI() or a similar routine.

Boolean values can be one of two values: true or false, representing the truth value of a logical proposition.

The typeof operator returns a string indicating the type of the operand's value.

Apart from graphic primitives like rectangles and circles, SVG offers a set of elements to embed other types of content in images as well.

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

The try...catch statement is comprised of a try block and either a catch block, a finally block, or both. The code in the try block is executed first, and if it throws an exception, the code in the catch block will be executed. The code in the finally block will always be executed before control flow exits the entire construct.

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

The instanceof operator tests to see if the prototype property of a constructor appears anywhere in the prototype chain of an object. The return value is a boolean value. Its behavior can be customized with Symbol.hasInstance.

The <animate> SVG element provides a way to animate an attribute of an element over time.