---
id: 5ef9b03c81a63668521804df
title: Part 45
challengeType: 0
isHidden: true
---
## Description
The `id` attribute is used to identify specific HTML elements. Each `id` attribute's value must be unique all other `id` values for the entire page.
Add an `id` attribute with the value `indoor` to the radio button. When elements have multiple attributes, the order of the attributes doesn't matter.
## Tests
```yml
tests:
- text: Your radio button should still be located between the opening and closing tags of the `label` element.
testString: |
const labelChildNodes = [ ...$('form > label')[0].childNodes ];
assert( labelChildNodes.filter(childNode => childNode.nodeName === "INPUT").length );
- text: Your radio button should have an `id` attribute. Check that there is a space after the opening tag's name and/or there are spaces before all attribute names.
testString: assert( $('input')[0].hasAttribute('id') );
- text: Your radio element should have an `id` attribute with the value `indoor`. You have either omitted the value or have a typo. Remember that attribute values should be surrounded with quotation marks.
testString: assert( $('input')[0].id.match(/^indoor$/) );
```
## Challenge Seed
