The document discusses JavaScript functions and validation. It defines a JavaScript function as a block of code that performs a particular task when invoked. Validation is described as a method to authenticate users, with JavaScript providing client-side form validation to speed up data processing compared to server-side validation. Client-side validation using JavaScript functions is explored.

1. Copyright © 2017, edureka and/or its affiliates. All rights reserved.

2. JAVASCRIPT FUNCTIONS
WHAT IS VALIDATION?
EMAIL VALIDATION IN JAVASCRIPT
www.edureka.co

3. www.edureka.co

4. Function
name(parameter) {
// Code to be executed
}
A JavaScript function is a block of code designed to perform a particular task.
It is executed when something calls or invokes it.
JavaScript Functions
www.edureka.co

5. www.edureka.co

6. WHAT IS VALIDATION?
CLIENT SERVER
Validation is a method to authenticate user. JavaScript provides facility to validate the form on the client-side so
data processing will be faster than server-side validation.
www.edureka.co

7. www.edureka.co

8. Copyright © 2017, edureka and/or its affiliates. All rights reserved.
www.edureka.co

9. www.edureka.co