84 lines
2.6 KiB
Markdown
84 lines
2.6 KiB
Markdown
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---
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id: 612e89d254fe5d3df7d6693d
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title: Part 10
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challengeType: 0
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dashedName: part-10
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---
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# --description--
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Now that you have reset the `html` box model, you need to pass that on to the elements within as well. To do this, you can set the `box-sizing` property to `inherit`, which will tell the targeted elements to use the same value as the parent element.
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You will also need to target the pseudo-elements, which are special keywords that follow a selector. The two pseudo-elements you will be using are the `::before` and `::after` pseudo-elements.
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The `::before` selector creates a pseudo-element which is the first child of the selected element, while the `::after` selector creates a pseudo-element which is the last child of the selected element. These pseudo-elements are often used to create cosmetic content, which you will see later in this project.
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For now, create a CSS selector to target all elements with `*`, and include the pseudo-elements with `::before` and `::after`. Set the `box-sizing` property to `inherit`.
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# --hints--
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You should have a `*, ::before, ::after` selector.
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```js
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assert(new __helpers.CSSHelp(document).getStyle('*, ::before, ::after'));
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```
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Your `*, ::before, ::after` selector should have the `box-sizing` property set to `inherit`.
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```js
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assert(new __helpers.CSSHelp(document).getStyle('*, ::before, ::after')?.boxSizing === 'inherit');
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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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<title>Responsive Web Design 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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--fcc-editable-region--
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html {
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box-sizing: border-box;
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}
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--fcc-editable-region--
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```
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