111 lines
2.4 KiB
Markdown
111 lines
2.4 KiB
Markdown
---
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id: 612ea97df5742154772f312e
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title: Step 19
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challengeType: 0
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dashedName: step-19
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---
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# --description--
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Nel selettore `.key.black--key::after` imposta la proprietà `position` su `absolute` e la proprietà `left` a `-18px`.
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# --hints--
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Il selettore `.key.black--key::after` dovrebbe avere una proprietà `position` impostata su `absolute`.
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```js
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assert(new __helpers.CSSHelp(document).getStyle('.key.black--key::after')?.position === 'absolute');
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```
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Il selettore `.key.black--key::after` dovrebbe avere una proprietà `left` impostata a `-18px`.
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```js
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assert(new __helpers.CSSHelp(document).getStyle('.key.black--key::after')?.left === '-18px');
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```
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# --seed--
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## --seed-contents--
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```html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<title>Piano</title>
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<link rel="stylesheet" href="./styles.css">
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</head>
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<body>
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<div id="piano">
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<div class="keys">
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<div class="key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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</div>
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</div>
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</body>
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</html>
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```
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```css
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html {
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box-sizing: border-box;
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}
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*, *::before, *::after {
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box-sizing: inherit;
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}
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#piano {
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background-color: #00471b;
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width: 992px;
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height: 290px;
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margin: 80px auto;
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padding: 90px 20px 0 20px;
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}
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.keys {
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background-color: #040404;
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width: 949px;
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height: 180px;
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padding-left: 2px;
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}
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.key {
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background-color: #ffffff;
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position: relative;
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width: 41px;
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height: 175px;
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margin: 2px;
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float: left;
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}
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--fcc-editable-region--
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.key.black--key::after {
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background-color: #1d1e22;
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content: "";
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}
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--fcc-editable-region--
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```
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