Introduction

Question 1

What is JavaScript?

Answer 1

JavaScript is a cross-platform, object-oriented scripting language used to make webpages interactive

There are also more advanced server side versions of JavaScript such as Node.js, which allow you to add more functionality to a website than downloading files

Inside a host environment JavaScript can be connected to the objects of its environment to provide programmatic control over them

Question 2

Describe the features of Client-Side JavaScript

Answer 2

JavaScript’s core language can be extended by supplying objects to control a browser and its Document Object Model (DOM)

For example, client-side extensions allow an application to place elements on an HTML form and respond to user events such as mouse clicks, form input, and page navigation

Question 3

Describe the features of Server-Side JavaScript

Answer 3

JavaScript’s core language can be extended by supplying objects relevant to running JavaScript on a server

For example, server-side extensions allow an application to communicate with a database, provide continuity of information from one invocation to another of the application, or perform file manipulations on a server

Question 4

Is JavaScript standardized?

Answer 4

JavaScript is standardized at Ecma International - the European association for standardizing information and communication systems (ECMA was formerly an acronym for the European Computer Manufacturers Association) to deliver a standardized, international programming language based on JavaScript

This standardized version of JavaScript, called ECMAScript, behaves the same way in all applications that support the standard