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html.erbで条件によりマルチクラス(class)を利用する方法

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概要

erbでのマルチクラスの書き方。
modifierなどを利用したコーディングをしている際によく利用される。

erb

<div class="toggle<%= ' toggle--open' if flag %>">

半角スペースは、modifier側につけることでコードが汚れなくなる。

HTML

<div class="toggle toggle--open">
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