擅长:python、mysql、java
<p>另一个选项是<a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray" rel="noreferrer">Array.isArray()</a></p>
<pre><code>if(! Array.isArray(classNames) ){
classNames = [classNames]
}
</code></pre>