For convenience, types are normally subdivided into primitives and objects. Objects are entities that have an identity (they are only equal to themselves) and that map property names to values ("slots" in prototype-based programming terminology). Objects may be thought of as associative arrays or hashes, and are often implemented using these data structures. However, objects have additional features, such as a prototype chain, which ordinary associative arrays do not have.
JavaScript has several kinds of built-in objects, namely Array, Boolean, Date, Function, Math, Number, Object, RegExp and String. Other objects are "host objects", defined not by the language but by the runtime environment. For example, in a browser, typical host objects belong to the DOM (window, form, links, etc.).
Read more about this topic: Java Script Syntax
Famous quotes containing the word objects:
“I stand in the sunny noon of life. Objects no longer glitter in the dews of morning, neither are yet softened by the shadows of evening.”
—Margaret Fuller (1810–1850)
“Women have seldom sufficient employment to silence their feelings; a round of little cares, or vain pursuits frittering away all strength of mind and organs, they become naturally only objects of sense.”
—Mary Wollstonecraft (1759–1797)