JavaScript is a programming language that allows you to implement a number of complex solutions in web documents.  It helps to make site pages more interactive, processes the actions of users of the site. This is an object-oriented client language that is supported by applications that work with the site's design. JavaScript became even more in popular among developers, when AJAX-technology appeared, which led to a new stage in the development of sites.

Here are just a few particular examples of the use of technology:

  • displaying content that is updated periodically (interactive maps);
  • creation of high-quality animation and graphic objects in 2D/3D format;
  • the option to scroll video in the media player.

Along with HTML and CSS, Javascript is the third important block on which base most of the standard web interfaces.

The user will need to know the basics of HTML and CSS to understand the language itself.

What does JavaScript provide?

The JavaScript core includes a number of functions that provide the following options:

  • to store some data in variables;
  • to activate part of the code according to certain scenarios that are implemented on the site page;
  • to create content that is updated automatically;
  • to manage multimedia capabilities (work with video, animate images).

Just a few lines of script code do amazing things.  That's why the language is so popular among developers.

What is API?

Functional provides even more features, available on top of the main components of the JavaScript. We are talking about application programming interfaces (APIs) that significantly expand the developer toolset.

API are ready-made code modules that help the programmer to implement some complex tasks.  Usually such "models" are divided into browser and API third-party developers.

Browser APIs include:

  • The DOM API (Document Object Model)
  • Geolocation modules
  • Canvas and WebGL API
  • Audio and Video API

Third-party interfaces include, for example, the social networking API Twitter and Facebook.

When we load a page in a browser, HTML and CSS are first processed. And JS is loading after that.

However, the language does not contain some useful tools.  There is no:

  • The standard library
  • Standard interfaces for working with servers and databases
  • Systems for managing packages.

Where can you use JavaScript?

JavaScript is processed in Web applications on the client side, which is in the browser.  Because of this, it can run on any operating system, and the web interfaces running on it are cross-platform.

Therefore, JavaScript is widely used in the following areas:

  • AJAX are scripts, which used in this well-known approach, which involves the asynchronous exchange of data between the user's browser and server resources.
  • Comet  is the way web applications work, when the server sends data to the browser without additional requests during the HTTP connection.
  • Browser OS - the code of some browser operating systems predominantly (sometimes more than 75%) consists of scripts.
  • Bookmarks - JavaScript has a wide application in the work of the program, which are placed in bookmarks of the browser.
  • Browser scripts are program modules that are written in this language and give a lot of opportunities (autocomplete forms, changing the page format, hiding unwanted content, adding interactive elements on the pages).
  • Server applications are code snippets that run on the server side where Java 6 is used.
  • Mobile applications - JavaScript can be useful in this popular direction.
  • Widgets  are various mini-programs that are used in the workspace and are very convenient.
  • Applied software are object-oriented language, which is used in the creation of individual applications, including simple games.

In addition, JavaScript is very important for learning programming.


Client scripts:

  • Javascript;
  • VBScript;
  • ActionScript;

Advantages Javascript:

  • supported by all browsers;
  • supported by following programs: Adobe Photoshop, Adobe Illustrator, Adobe InDesign та Adobe Dreamweaver;
  • checking registration forms on errors before sending to the server;
  • creates a vivid and interactive pages;
  • you can carry out various types of calculation;

Nowadays, JavaScript is one of the most popular client languages.  Our specialists have extensive experience in using the language in practice.  We will help you implement useful solutions in JavaScript and improve the functioning of your site with it.


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