What Is JavaScript?

JavaScript is a scripting language used to add interactive features on Web pages. Many browsers support JavaScript, which was developed by Netscape in the mid-1990s. Read on for more information. Schools offering Computer Programming degrees can also be found in these popular choices.

JavaScript Overview

The JavaScript language is not the same as Java. Java is a programming language developed by Sun Microsystems (now owned by Oracle) and can stand on its own. JavaScript, a product of Netscape, requires supporting tools on the Web page where it's used to work correctly.

Slight similarities between JavaScript and the Java programming language include closely related syntaxes and overlapping terminology. The JavaScript language is primarily used to enhance interactive features on Web pages and is supported by many Web browsers. However, browsers that are not developed by either Netscape or Microsoft often run into problems with supporting JavaScript. This may be because JavaScript does not use the same kinds of tags that HTML does.

Important Facts About This Field of Study

Degree Field Computer Science, Web Development
Prerequisites Basic knowledge of HTML
Online Availability Courses available online
Possible Careers JavaScript Developer, Front End Developer, Web Developer

JavaScript Features

Some features of JavaScript are:

  • Dynamic Typing: JavaScript is different from other programming languages because it supports different methods to test the type of an object. This also includes the duck typing method.
  • Objects as associative arrays: A key feature of the JavaScript language is that it is almost entirely object-based. Objects in JavaScript are listed as associative arrays.
  • Run-time evaluation: Another key feature of JavaScript is an evaluation function that can execute statements.
  • Prototypes: When defining object properties, JavaScript uses prototypes instead of classes. Prototype methods supported include methods and inheritance.
  • Function as object constructors: Functions in JavaScript work in their usual role but can also double as object constructors.
  • Run-time environment: JavaScript runs in a run-time environment. This means that it runs in a Web browser and can interact with Web pages by providing methods and objects.

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