113 lines
2.9 KiB
Markdown
113 lines
2.9 KiB
Markdown
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---
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id: 6153a3952facd25a83fe8083
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title: Step 20
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challengeType: 0
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dashedName: step-20
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---
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# --description--
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Crea una media query per schermi di larghezza inferiore a `800px`. Al suo interno, crea una regola `#gallery img` e imposta la proprietà `width` sul `50%`. In questo modo, convertirai la tua galleria in un layout a due colonne.
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# --hints--
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Dovresti aggiungere una nuova `@media` query.
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```js
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assert(new __helpers.CSSHelp(document).getCSSRules('media')?.length === 1);
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```
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La nuova `@media` query dovrebbe avere una proprietà `max-width` con il valore `800px`.
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```js
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assert(new __helpers.CSSHelp(document).getCSSRules('media')?.[0]?.media?.mediaText === '(max-width: 800px)');
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```
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La `@media` query dovrebbe avere una regola `#gallery img`.
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```js
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const rules = new __helpers.CSSHelp(document).getRuleListsWithinMedia('(max-width: 800px)');
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assert(rules?.find(rule => rule.selectorText === '#gallery img'));
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```
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La regola `#gallery img` dovrebbe avere una proprietà `width` con il valore `50%`.
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```js
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const rules = new __helpers.CSSHelp(document).getRuleListsWithinMedia('(max-width: 800px)');
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const imgRule = rules?.find(rule => rule.selectorText === '#gallery img');
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assert(imgRule?.style.width === '50%');
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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>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Photo Gallery</title>
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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 class="header">
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<h1>CSS FLEXBOX PHOTO GALLERY</h1>
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</div>
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<div id="gallery">
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<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/1.jpg"/>
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<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/2.jpg"/>
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<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/3.jpg"/>
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<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/4.jpg"/>
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<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/5.jpg"/>
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<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/6.jpg"/>
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<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/7.jpg"/>
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<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/8.jpg"/>
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<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/9.jpg"/>
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<img src="https://cdn.freecodecamp.org/curriculum/css-photo-gallery/10.jpg"/>
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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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* {
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box-sizing: border-box;
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}
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body {
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margin: 0;
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font-family: Arial;
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background: #EBE7E7;
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}
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.header {
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text-align: center;
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padding: 32px;
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background: #E0DDDD;
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}
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#gallery {
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display: flex;
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flex-direction: row;
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flex-wrap: wrap;
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justify-content: center;
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align-items: center;
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padding: 0 4px;
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}
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#gallery img {
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width: 25%;
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height: 300px;
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object-fit: cover;
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margin-top: 8px;
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padding: 0 4px;
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border-radius: 10px;
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}
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--fcc-editable-region--
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--fcc-editable-region--
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```
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