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CSS3を使ってfooterを最下部に固定する方法

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ページ内のコンテンツの量が少なくてfooterが浮いてしまっている時に、CSSを使ってfooterを最下部に固定する方法を紹介します。

まずはコードから

sample.html
<body>
    <main>

       <!--コンテンツの記述-->

    </main>

    <footer>

       <!--フッターの記述-->

    </footer>
  </div>
</body>
style.css
body{ 
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

footer{
  margin-top: auto;
}
  • bodyダグのflex-directionをcolumnにして、要素の並びを垂直の上から下方向に指定します。

  • bodyタグのmin-heightを100vhにすることで、画面の高さいっぱいまで要素を広げることができます。

  • footerタグのmargin-topをautoにすることで、余分な余白(footerの上にあるはずの余白)を全て指定できるので、fotterが画面の1番下に配置されます。

参考:footerを常に最下部に固定する方法(簡単)

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