---
id: 5ef9b03c81a63668521804db
title: Part 40
challengeType: 0
---
## Description
To prevent a user from submitting your form when required information is missing, you need to add the `required` attribute to an `input` element. There's no need to set a value to the `required` attribute. Instead, just add the word `required` to the `input` element, making sure there is space between it and other attributes.
## Tests
```yml
tests:
- text: You have either deleted your `input` element or it has invalid syntax. All attributes' values should be surrounded by quotation marks.
testString: assert( $('input').length );
- text: Your `form` should only contain the `input` element. Remove any HTML additional elements or text within the `form` element.
testString: assert( $('form')[0].children.length === 1 && $('form')[0].innerText.trim().length === 0 );
- text: Your `input` element should have a `required` attribute`. Remember, you just add the word `required` inside the `input` element's tag.
testString: assert( $('input')[0].hasAttribute('required') );
- text: A value should not be given to the `required` attribute`.
testString: assert( $('input')[0].getAttribute('required') === '' );
```
## Challenge Seed
