HTML5 APPLICATIONS DEVELOPMENT MANUAL

22 - Objects in JavaScript

An HTML element is an object, like a house or a car. Just as with real

life objects, we can access and modify HTML objects that appear on a screen.

The creation of interactive Web pages and apps relies on our ability to

manipulate objects on a screen. Objects are models of things in the real

world that were built using data. Objects are grouped into object models,

which are used to represent Browsers and Web pages.

In JavaScript, almost "everything" is an object.

• Booleans can be objects (if defined with the new keyword)


• Numbers can be objects (if defined with the new keyword)


• Strings can be objects (if defined with the new keyword)


• Dates are always objects


• Maths are always objects


• Regular expressions are always objects


• Arrays are always objects


• Functions are always objects


• Objects are always objects

All JavaScript values, except primitives, are objects.