2022-05-26 16:20:33 +00:00
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---
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id: 615380dff67172357fcf0425
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title: Step 7
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challengeType: 0
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dashedName: step-7
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---
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# --description--
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Normalizza il box model creando un selettore `*` e impostando la proprietà `box-sizing` su `border-box`.
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# --hints--
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Dovresti avere un selettore `*`.
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```js
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assert.exists(new __helpers.CSSHelp(document).getStyle('*'));
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```
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Il selettore `*` dovrebbe avere una proprietà `box-sizing` con il valore `border-box`.
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```js
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assert(new __helpers.CSSHelp(document).getStyle('*')?.boxSizing === 'border-box');
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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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2022-08-02 11:46:54 +00:00
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<html lang="en">
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2022-05-26 16:20:33 +00:00
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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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2022-08-02 11:46:54 +00:00
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<header class="header">
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<h1>css flexbox photo gallery</h1>
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</header>
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<div class="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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2022-05-26 16:20:33 +00:00
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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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--fcc-editable-region--
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--fcc-editable-region--
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```
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