jQuery确定标签是否为空 [英] jQuery determine if a tag is empty

问题描述

我几乎已经明白了，但是只需要稍微推动一下即可.我正在解析一个包含(可能)HTML的字符串.这是代码:

I've almost got this but just need a little push over the edge. I'm parsing a string which contains (potentially) HTML. Here's the code:

function clean(snippet) {
   OBJ = $(snippet);
   txt = OBJ.text();

    if(txt) { 
      parsed = txt;
    } else {
        parsed = snippet;
    }
    return parsed;
}

这是我的测试用例:

alert(clean("<div>Randomness</div>")); // Alerts "Randomness"
alert(clean("Randomness"));            // Alerts "Randomness"
alert(clean("<div></div>"));           // Alerts "<div></div>" - should be blank

我真的无法弄清楚如何确定它只是一个传入的空标记还是纯文本，以及如何处理它.因此，我需要进行测试以查看标签是否为空.不确定这是否是最好的方法.

I can't really figure out how to determine if its just an empty tag that gets passed in vs just plain text and how to deal with it. So I need a test to see if a tag is empty, perhaps. Not sure if that's the best way.

推荐答案

您可以测试查询是否返回任何对象:

You can test if your query returns any objects:

function clean(snippet) {
   OBJ = $(snippet);
   if(OBJ.length == 0)
      return snippet;
   txt = OBJ.text();
   return txt;
}

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