- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- MS Excel
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to add form validation for empty input fields with JavaScript?
To add form validation for empty input fields with JavaScript, the code is as follows −
Example
<!DOCTYPE html> <html> <head></head> <h1>JavaScript empty input field validation example</h1> <form name="Form1" onsubmit="return emptyValidation()" required> Name: <input type="text" name="firstName" /> <input type="submit" value="Submit" /> </form> <h2>Submit the form empty to see the validation performed</h2> <script> function emptyValidation() { var formField = document.forms["Form1"]["firstName"].value; if (formField == "" || x == null) { alert("Name must be filled out"); return false; } } </script> </body> </html>
Output
The above code will produce the following output −
On submitting the form empty −
Advertisements