Form Validator using JavaScript

By Naveen Rathi

A form validator is a software script designed to ensure that user-submitted data in a form meets specified criteria. The primary goal of a form validator is to validate user inputs on web forms.

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A form validator is a software script designed to ensure that user-submitted data in a form meets specified criteria or requirements. The primary goal of a form validator is to validate user inputs on web forms, typically found on websites or applications, before the data is submitted to a server for further processing. This helps in maintaining data integrity, improving user experience, and preventing erroneous or malicious data from being processed.

Key aspects and features:-

1)Data Validation: Checking user inputs to ensure they conform to predefined rules and constraints. This includes checking for required fields, valid email addresses, proper date formats,and more.

2)Real-Time Feedback: Providing immediate feedback to users as they fill out the form, indicating whether their inputs are valid or if there are errors. 

3)Custom Validation Rules: Allowing developers to define custom validation rules based on the specific requirements of the application. This ensures flexibility and adaptability to different use cases.

4)Error Handling: Effectively communicating validation errors to users, indicating which fields need correction and providing clear instructions on how to resolve issues.

5)Dynamic Form Changes: Adapting to dynamic changes in the form, such as showing or hiding fields based on user inputs.

 

HTML, CSS and JavaScript is used to develop Form Validator.