vue绑定class的多种方式

<span class="active">原始命名</span>
<span :class="active">动态命名</span>
<span :class="遍量=='条件'?'成立':'不成立'">三元运算</span>
<span :class="{'active':遍量=='条件'}">条件判断</span>
<span :class="[active,'default']">动态+默认}</span>
<span :class="[遍量=='条件'?'成立':'不成立','默认值']">三元判断+默认</span>

暂时想到这些发现了再补充