Pen Settings

HTML

CSS

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. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

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JavaScript

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.

+ add another resource

Packages

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.

Behavior

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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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HTML

              
                <!--
忍者Code
HTML_CSS 初級
https://ninjacode.work/course/HTML_CSS/1/15

15 文字を隠してみよう

「問題」
block要素の中に入っている、テキストをCSSで隠してみましょう

見本を参考に飛び出している文字を隠してみましょう。
-->
<div class="block" style="position: relative;width: 200px;height: 50px;border: 1px solid;">
    <div style="position: absolute;width: 300px;">テキストテキストテキストテキストテキストテキストテキストテキスト</div>
</div>
<!--
「解説」
要素から文字を隠したい時は
親要素に対してoverflow: hidden;を付与してあげる事で隠す事ができます。
-->
<!--メモ-->
<hr>
<p>
  <b>※overflowで文字を隠す時、scrollを使うと便利。</b>
</p>
overflow-x: scroll;
<div class="over-x">Overflow</div>
overflow-y: scroll;
<div class="over-y">Overflowとは?</div>
              
            
!

CSS

              
                .block {
  overflow: hidden;
}

.over-x {
  border: 1px solid #333333;
  width: 100px;
  font-size: 250%;
  overflow-x: scroll;
}
.over-y {
  border: 1px solid #333333;
  width: 200px;
  height: 100px;
  font-size: 300%;
  overflow-y: scroll;
}
              
            
!

JS

              
                
              
            
!
999px

Console