Overview of Features of JavaScript
The following article provides a detailed outline of the features of JavaScript. Java Script was developed by Brendan Eich in Netscape in 1995 for coding in web pages allowing the logical operation to client edge. JavaScript is mainly a client edge script language. This object-centered script language most commonly used for designing web pages which are a standalone language developed in Netscape. It gives the user extra control over the browser with potential in the creation of new functions in scripts. This scripting language features case sensitive input with the detection of the user’s browser and operating system. JavaScript is mostly used by validation in client edge technology.
The following are more characteristics of JavaScript:
- Object-Centered Script Language
- Client edge Technology
- Validation of User’s Input
- Else and If Statement
- Interpreter Centered
- Ability to perform In Built Function
- Case Sensitive format
- Light Weight and delicate
- Statements Looping
- Handling Events
- The Statement Control Syntax System of Java Script is very similar to Statement Control Syntax used in C Language. Java Script allows more abilities to perform as HTML is only capable of designing websites and incapable of performing logic operations like condition checking, statements looping (while & for), statement decision making (else and if) at client edge and adding two numbers.
- JavaScript is incapable of performing these functions which results in our need for JavaScript to execute these operations over the client edge. This scripting language can help to build more interactive websites, developing inbuilt clocks, light client edge programs, building windows popup with different dialog boxes like alerting dialog boxes, confirmation dialog boxes, and prompt dialog options.
- Nowadays many web-based giants are using the technology of Java Script like Facebook, YouTube, Twitter, Gmail and Google Maps, etc. The Java Script features Enterprise level pop-down menus, Opening, and Closure of new window, manipulation of HTML Layers, Interface Enhancement of HTML, Adding animation essentials within the page, adding dynamic appearance in documents of HTML and Fixing of problems related to Browsers.
- The Validation of data input within HTML Form data which is being sent to the server can be done using JavaScript. Users can also perform manipulation of data for layers of HTML like moving capability, hiding, change is the interface of HTML codes and writing them separately are some great features of Java Script.
JavaScript Features
Now let us see the features of JavaScript in detail:
1. Object-Centered Script Language
Object Centered Language features built in the object as Java Script has a window object. Some Common Examples of Object Centered languages are Java Script and Visual Basic etc. The object-centered languages are mostly used for features like Polymorphism which is a quality of taking an object in many forms. Use of Polymorphism within object-oriented programming requires whenever we use to represent reference of the parent class to an object of a child class.
2. Client Edge Technology
The client is basically a term used for Web Browser in respective of User. The data on the server gets uploaded by a client which later used by a user in the rendered form. The user gets access to the client through a web browser for surfing and interacting through websites. The client edge technology in Java Script allows the client to have full control over the content which is being updated in servers.
3. Validation of User’s Input
Validation of User’s Input is most commonly known as form validation, it allows users to interact with client through filling forms through web pages. The details in the form need to be correctly filled where form validation helps the client to validate the details entered by the user.
4. Else and IF Statement
IF and Else Statements are used to perform logical operations.
5. Interpreter Centered
Java Script is built with Interpreter Centered which allows the user to get the output without the use of Compiler. That means the input performed by the user gets rendered directly without the compiling of codes.
6. Ability to Perform In Build Function
Java Script has many In-Built Functions like isNAN (), Number (), parseFloat () and parseInt () etc. isNAN () Function is used to identify that input object is correct number format. parseFloat () function is used in the conversion of the object into a number. parseInt () Function is used to analyze strings.
7. Case Sensitive Format
The codes written in Java Script are Case Sensitive which explains that there will be no difference in the output whether the codes are written in Upper Case or Lower Case Format.
8. Light Weight and delicate
Java Script Features Light Weight and delicate and codes written in JavaScript don’t include variables and uses only objects to perform the operations.
9. Statements Looping
The statement looping is used to perform the same operations repeatedly. In this operation the same set of code run in repeat manner for a specific or unspecific set of time.
10. Handling Events
The Java Script has the ability to control operations updated on servers. This is basically controlling the response on the website when the user tries to perform any operation the server handled by the client like clicking on links and options, interaction response over the website, etc.
Java Script Comments
These are helpful in understanding the purpose of code, Comments will not be displayed in the output rendered by JavaScript.
There are two types of Java Script Comments:
- Comments are written under Single Line
- Comments are written under Multi-Line
Comments Written under Single Line
These Comments can be identified using double forward Slashes.
Example of Comments written under Single Line is:
<script>
// This is how we write comments is single line
document.write ( "HTML and JavaScript" );
<script/>Result
HTML and JavaScript
Comments Written under Multi-Line
These Comments can be identified with a structure that starts with forwarding slash and asterisk and ends with an asterisk and forward slash.
Example of Comments written under Multi-Line:
<script>
/* This is how we write comments in Multi-Line /*
document.write ( "Features of JavaScript" );
<script/>Result:
Features of Java Script
Limitations of Java Script
- Reading and Writing Capability on client edge is not available in Java Script.
- Performing Functioning with Network Programs is not available in Java Script.