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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

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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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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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HTML 

              
                <p>配送方法３を選択したら、「配送時間を選択」が非表示になるサンプルです。</p>

<label for="ship-type">配送方法を選択</label>
<select id="ship-type" class="ship-type">
  <option value="value1">配送方法１</option>
  <option value="value2">配送方法２</option>
  <option value="value3">配送方法３</option>
</select>

<!-- カレンダーマスターの配送時間選択メニュー -->
<div class="app-deliverydate app-deliverydate--time">
  <label for="delivery_time" class="delivery_time">配送時間を選択</label>
  <select id="delivery_time" name="attributes[delivery_time]" value="" style=""> 
    <option>指定なし</option> 
    <option>午前中</option>
    <option>12時頃-14時頃</option>
    <option>14時頃-16時頃</option>
  </select>
</div>
!

CSS 

              
                /* サンプル上の見た目を整えるためだけのスタイル */
.ship-type {
  margin: 30px 0;
}
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JS 

              
                const selectMenu = document.getElementById("ship-type");
const timeOption = document.querySelector(".app-deliverydate--time");

selectMenu.addEventListener("change", function() {
  if(selectMenu.value === "value3") {
    timeOption.style.display = "none";
  } else {
    timeOption.style.display = "block";
  }
});
!
999px

Console