div><h3 id="dir"><a href="#dir" class="header-anchor">#</a> ${ dir }</h3> <blockquote><p>方向，用于 margin 和 padding 工具类确定方向 <br>
t、r、b、l、x、y，分别为 上、右、下、左、左右、上下</p></blockquote> <div class="language-html extra-class"><pre class="language-html"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punc