Class 9 Computer Science Web Scripting Java Script Notes

Computer Science
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Download the latest Class 9 Computer Science Web Scripting Java Script Notes in PDF format. These Class 9 Computer Science revision notes are carefully designed by expert teachers to align with the 2025-26 syllabus. These notes are great daily learning and last minute exam preparation and they simplify complex topics and highlight important definitions for Class 9 students.

Chapter-wise Revision Notes for Class 9 Computer Science Web Scripting Java Script

To secure a higher rank, students should use these Class 9 Computer Science Web Scripting Java Script notes for quick learning of important concepts. These exam-oriented summaries focus on difficult topics and high-weightage sections helpful in school tests and final examinations.

Web Scripting Java Script Revision Notes for Class 9 Computer Science

Introduction and History of Java Script
 
JavaScript started life as Live Script, but Netscape changed the name, possibly because of the excitement being generated by Java.to JavaScript. JavaScript is a lightweight, interpreted programming language with object-oriented capabilities that allows you to build interactivity into otherwise static HTML pages. The general-purpose core of the language has been embedded in Netscape, Internet Explorer, and other web browsers. Client-side JavaScript is the most common form of the language. The script should be included in or referenced by an HTML document for the code to be interpreted by the browser. It means that a web page need no longer be static HTML, but can include programs that interact with the user, control the browser, and dynamically create HTML content.
 
Objectives and Properties
 
JavaScript is:
• JavaScript is a lightweight, interpreted programming language
• Designed for creating network-centric applications
• Complementary to and integrated with Java
• Complementary to and integrated with HTML
• Open and cross-platform
 
The general-purpose core of the language has been embedded in Netscape, Internet Explorer, and other web browsers
 
Advantages of JavaScript: The merits of using JavaScript are:
 
• Less server interaction: You can validate user input before sending the page off to the server. This saves server traffic, which means less load on your server.
• Immediate feedback to the visitors: They do not have to wait for a page reload to see if they have forgotten to enter something.
• Increased interactivity: You can create interfaces that react when the user hovers over them with a mouse or activates them via the keyboard.
• Richer interfaces: You can use JavaScript to include such items as drag-and-drop components and sliders to give a Rich Interface to your site visitors.
 
Limitations with JavaScript:

• We cannot treat JavaScript as a full-fledged programming language.
• Client-side JavaScript does not allow the reading or writing of files. This has been kept for security reason.
• JavaScript cannot be used for networking applications because there is no such support available.
• JavaScript does not have any multithreading or multiprocess capabilities.
 
JavaScript Syntax:
A JavaScript consists of JavaScript statements that are placed within the <script>... </script> HTML tags in a web page.
 
Class 9 Computer Science Web Scripting Java Script Notes
 
The script tag takes two important attributes:
• Language: This attribute specifies what scripting language you are using. Typically, its value will be JavaScript.
• Type: This attribute is what is now recommended to indicate the scripting language in use and its value should be set to "text/javascript".
 
 
Your First JavaScript Script:
Let us write an example to print out "Hello World".
Class-9-Computer-Science-Web-Scripting-Java-Script-Notes-unlocked 1
So above code will display following result:
Class-9-Computer-Science-Web-Scripting-Java-Script-Notes-unlocked 2
Variables & Operators
 
• Variable constraints,
 
JavaScript Data Types: One of the most fundamental characteristics of a programming language is the set of data types it supports. These are the type of values that can be represented and manipulated in a programming language.
 
JavaScript allows you to work with three primitive data types:
 
• Numbers eg. 123, 120.50 etc.
• Strings of text e.g. "This text string" etc.
• Boolean e.g. true or false.
Java does not make a distinction between integer values and floating-point values.
 
JavaScript Variables
 
Variable is the stored memory location that can hold a value in it. Variables are declared with the var keyword. Storing a value in a variable is called variable initialization.
Example:
Class-9-Computer-Science-Web-Scripting-Java-Script-Notes-unlocked 3
 
JavaScript Variable Scope:
 
The scope of a variable is the region of your program in which it is defined. JavaScript variable will have only two scopes.
 
• Global Variables: A global variable has global scope which means it is defined everywhere in your JavaScript code.
• Local Variables: A local variable will be visible only within a function where it is defined. Function parameters are always local to that function.
Class-9-Computer-Science-Web-Scripting-Java-Script-Notes-unlocked 4
This produces the following result:
Class-9-Computer-Science-Web-Scripting-Java-Script-Notes-unlocked 5
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Important Practice Resources for Class 9 Computer Science

CBSE Class 9 Computer Science Web Scripting Java Script Notes

Students can use these Revision Notes for Web Scripting Java Script to quickly understand all the main concepts. This study material has been prepared as per the latest CBSE syllabus for Class 9. Our teachers always suggest that Class 9 students read these notes regularly as they are focused on the most important topics that usually appear in school tests and final exams.

NCERT Based Web Scripting Java Script Summary

Our expert team has used the official NCERT book for Class 9 Computer Science to design these notes. These are the notes that definitely you for your current academic year. After reading the chapter summary, you should also refer to our NCERT solutions for Class 9. Always compare your understanding with our teacher prepared answers as they will help you build a very strong base in Computer Science.

Web Scripting Java Script Complete Revision and Practice

To prepare very well for y our exams, students should also solve the MCQ questions and practice worksheets provided on this page. These extra solved questions will help you to check if you have understood all the concepts of Web Scripting Java Script. All study material on studiestoday.com is free and updated according to the latest Computer Science exam patterns. Using these revision notes daily will help you feel more confident and get better marks in your exams.

Where can I download the latest PDF for Class 9 Computer Science Web Scripting Java Script Notes?

You can download the teacher prepared revision notes for Class 9 Computer Science Web Scripting Java Script Notes from StudiesToday.com. These notes are designed as per 2025-26 academic session to help Class 9 students get the best study material for Computer Science.

Are these Computer Science notes for Class 9 based on the 2026 board exam pattern?

Yes, our Class 9 Computer Science Web Scripting Java Script Notes include 50% competency-based questions with focus on core logic, keyword definitions, and the practical application of Computer Science principles which is important for getting more marks in 2026 CBSE exams.

Do these Class 9 notes cover all topic-wise concepts for Computer Science?

Yes, our Class 9 Computer Science Web Scripting Java Script Notes provide a detailed, topic wise breakdown of the chapter. Fundamental definitions, complex numerical formulas and all topics of CBSE syllabus in Class 9 is covered.

How can I use Class 9 Computer Science Web Scripting Java Script Notes for quick last-minute revision?

These notes for Computer Science are organized into bullet points and easy-to-read charts. By using Class 9 Computer Science Web Scripting Java Script Notes, Class 9 students fast revise formulas, key definitions before the exams.

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