Pen Settings



CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using it's URL and the proper URL extention.

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Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.


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If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

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                <div class="wrapper">
  <p>HEX CODE: #3474FF</p>
  <button>Change Color</button>



                .wrapper {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100vw;
  height: 100vh;
  background-color: #3474FF;

p {
  font-size: 50px;

button {
  font-size: 20px;
  padding: 10px;
  border-radius: 6px;



  다음과 같은 조건을 만족하는 화면을 만들어 주세요!
  📌 버튼 클릭시 랜덤한 HEX CODE가 배경 색으로 변경되어야 합니다.
  📌 현재 HEX CODE가 <p> 태그의 텍스트로 표시되어야 합니다.