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---
id: 612eaf56b7ba3257fdbfb0db
title: Step 21
challengeType: 0
dashedName: step-21
---
# --description--
Per rendere il piano ufficiale, aggiungiamo il logo di freeCodeCamp.
Aggiungi un elemento `img` prima dell'elemento `.keys` . Assegna all'elemento `img` un valore `class` di `logo` e imposta l'`src` su `https://cdn.freecodecamp.org/platform/universal/fcc_primary.svg` . Dagli un testo `alt` di `freeCodeCamp Logo` .
# --hints--
Dovresti aggiungere un nuovo elemento `img` .
```js
assert(document.querySelectorAll('img')?.length === 1);
```
L'elemento `img` dovrebbe trovarsi prima del primo elemento `.key` .
```js
const img = document.querySelector('img');
assert(img?.nextElementSibling?.className === 'keys');
assert(img?.previousElementSibling === null);
```
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L'elemento `img` dovrebbe avere l'attributo `class` impostato su `logo` .
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```js
const img = document.querySelector('img');
assert(img?.className === 'logo');
```
L'elemento `img` dovrebbe avere un `src` impostato su `https://cdn.freecodecamp.org/platform/universal/fcc_primary.svg` .
```js
const img = document.querySelector('img');
assert(img?.getAttribute('src') === 'https://cdn.freecodecamp.org/platform/universal/fcc_primary.svg');
```
L'elemento `img` dovrebbe avere un attributo `alt` impostato su `freeCodeCamp Logo` .
```js
assert(document.querySelector('img')?.getAttribute('alt')?.toLowerCase() === 'freecodecamp logo');
```
Fai attenzione alle maiuscole/minuscole e all'ortografia.
```js
assert(document.querySelector('img')?.getAttribute('alt') === 'freeCodeCamp Logo');
```
# --seed--
## --seed-contents--
```html
<!DOCTYPE html>
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< html lang = "en" >
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< head >
< meta charset = "UTF-8" / >
< title > Piano< / title >
< meta name = "viewport" content = "width=device-width, initial-scale=1.0" / >
< link rel = "stylesheet" href = "./styles.css" >
< / head >
< body >
--fcc-editable-region--
< div id = "piano" >
< div class = "keys" >
--fcc-editable-region--
< div class = "key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< / div >
< / div >
< / body >
< / html >
```
```css
html {
box-sizing: border-box;
}
*, *::before, * ::after {
box-sizing: inherit;
}
#piano {
background-color: #00471b ;
width: 992px;
height: 290px;
margin: 80px auto;
padding: 90px 20px 0 20px;
}
.keys {
background-color: #040404 ;
width: 949px;
height: 180px;
padding-left: 2px;
}
.key {
background-color: #ffffff ;
position: relative;
width: 41px;
height: 175px;
margin: 2px;
float: left;
}
.key.black--key::after {
background-color: #1d1e22 ;
content: "";
position: absolute;
left: -18px;
width: 32px;
height: 100px;
}
```