jquery - 如何在 if 语句内的克隆元素上使用 `$.trim()` ？

Question

我正在尝试检查if a paragraph (excluding any nested child tags) contain text -- 但现在它的缩进会产生误报 -- 那么如何使用 $.trim() 来消除它们呢？

http://jsfiddle.net/frank_o/td8t4gpv/2/

HTML:

<div>
    <p>
      <a>Should not react to this</a>
    </p>
</div>

JS:

if($('p').clone().children().remove().end().text()) {
  console.log('WRONG! Paragraph does not have any text');
}

Answer 1

将字符串传递给 $.trim:

if(! $.trim($('p').clone().children().remove().end().text())) {
    alert('WRONG! Paragraph does not have any text');
}

JSFiddle Demo