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freeCodeCamp/curriculum/challenges/english/01-responsive-web-design/css-piano/step-009.md
Nicholas Carrigan (he/him) b36cdbafd1 chore: rename "part" to "step" (#43934)
* chore: rename part to step

* chore: update metas

* chore: more renaming

* chore: update tooling

* chore: update frontmatter

* chore(tools): title testing
2021-10-21 18:07:52 +01:00

1.9 KiB

id, title, challengeType, dashedName
id title challengeType dashedName
612e89562043183c86df287c Step 9 0 step-9

--description--

Browsers can apply default margin and padding values to specific elements. To make sure your piano looks correct, you need to reset the box model.

Add an html rule selector to your CSS file, and set the box-sizing property to border-box.

--hints--

You should have an html selector.

assert(new __helpers.CSSHelp(document).getStyle('html'));

Your html selector should have the box-sizing property set to border-box.

assert(new __helpers.CSSHelp(document).getStyle('html')?.boxSizing === 'border-box');

--seed--

--seed-contents--

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>Responsive Web Design Piano</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="./styles.css">
  </head>
  <body>
    <div id="piano">
      <div class="keys">
        <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>
--fcc-editable-region--

--fcc-editable-region--