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HTML

CSS

CSS Base

Vendor Prefixing

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JavaScript

Babel includes JSX processing.

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Packages

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Behavior

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HTML

              
                <h3>これはブロック要素です。</h3>
<div>ブロック要素は幅100%の領域を確保します。</div>
<div>そのため、前後で改行されたように見えます。</div>
<hr>
<b>これはインライン要素です。</b>
<span>幅を持たず、要素内のコンテンツによって描画領域が決まります。画面の右端までいくと、自動的に折り返します。</span>
ちなみに <a href="#">リンクもインライン要素です。</a>
              
            
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JS

              
                
              
            
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999px

Console