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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Insecure Resource

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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Packages

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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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Using packages here is powered by Skypack, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ES6 import usage.

All packages are different, so refer to their docs for how they work.

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HTML 

              
                <div class="toggle-area">
  <div class="item">
    <input type="checkbox" id="sample-1" name="toggle1" value="1">
    <label for="sample-1">トグルボタン1</label>
  </div>
  <div class="item">
    <input type="checkbox" id="sample-2" name="toggle2" value="2">
    <label for="sample-2">トグルボタン2</label>
  </div>
  <div class="item">
    <input type="checkbox" id="sample-3" name="toggle3" value="3">
    <label for="sample-3">トグルボタン3</label>
  </div>
</div>
!

CSS 

              
                div.item {
  margin: 15px;
}

div.toggle-area input[type="checkbox"] {
  display: none;
}

label {
  position: relative;
  padding-left: 60px;
  cursor: pointer;
}

label::before,
label::after {
  content: "";
  display: block;
  position: absolute;
  /* 位置調整 */
  top: 50%;
  left: 0px;
  /* 中央に揃える */
  transform: translateY(-50%);
  /* 枠線 */
  border: 1.4px solid rgba(0,0,0,.3);
  border-radius: 50%;
  /* アニメーションの変化時間 */
  transition: .2s;
}

label::before {
  /* 背景色 */
  background-color: rgba(0, 106, 182, .2);
  /* 枠線 */
  border: 1.4px solid rgba(0,0,0,.3);
  border-radius: 12px;
  /* サイズ調整 */
  height: 20px;
  width: 40px;
  /* 位置調整 */
  top: 50%;
  left: 5px;
}

label::after {
  /* 背景色 */
  background-color: #fff;
  /* 枠線 */
  border-radius: 50%;
  /* サイズ調整 */
  height: 23px;
  width: 23px;
  /* 位置調整 */
  top: 50%;
  left: 0px;
}

/* チェックありの場合 */
input:checked + label::before {
  /* 背景色 */
  background-color: rgb(0, 106, 182);
}

input:checked + label::after {
  /* トグルを右に移動させる */
  left: 26px;
}
!

JS
!
999px

Console