---
id: 5d822fd413a79914d39e9910
title: Part 72
challengeType: 0
dashedName: part-72
---
# --description--
Add the new `window-wrap` class to the `bb4c` element.
# --hints--
test-text
```js
assert($('.bb4c.window-wrap').length === 1);
```
# --seed--
## --seed-contents--
```html
freeCodeCamp Skyline Project
```
# --solutions--
```html
freeCodeCamp Skyline Project
```