如果我有这样的html:

<li id="listItem">
    This is some text
    <span id="firstSpan">First span text</span>
    <span id="secondSpan">Second span text</span>
</li>

我试图使用.text()检索字符串“这是一些文本”,但如果我说$('#list-item').text(),我得到“这是一些textFirst span textSecond span文本”。

是否有一种方法可以获取(并可能通过.text("")之类的方法删除)标签中的自由文本,而不是其子标签中的文本?

HTML不是我写的,所以这是我必须与工作。我知道这将是简单的,只是包装标签的文本时编写的html,但再次,html是预先编写的。


当前回答

你可以试试这个

alert(document.getElementById('listItem').firstChild.data)

其他回答

只需将它放在<p>或<font>中,然后获取$('#listItem font').text()

我想到的第一件事

<li id="listItem">
    <font>This is some text</font>
    <span id="firstSpan">First span text</span>
    <span id="secondSpan">Second span text</span>
</li>

我提出了一个具体的解决方案,应该比克隆和修改克隆更有效。这个解决方案只适用于以下两个保留,但应该比目前接受的解决方案更有效:

你得到的只是文本 要提取的文本位于子元素之前

话虽如此,下面是代码:

// 'element' is a jQuery element
function getText(element) {
  var text = element.text();
  var childLength = element.children().text().length;
  return text.slice(0, text.length - childLength);
}

不确定有多灵活或多少情况下,你需要它覆盖,但对于你的例子,如果文本总是出现在第一个HTML标签之前-为什么不只是在第一个标签上分割内部HTML,并采取前者:

$('#listItem').html().split('<span')[0]; 

如果你需要更宽一点

$('#listItem').html().split('<')[0]; 

如果你需要两个标记之间的文本,比如在一件事之后,但在另一件事之前,你可以做一些像(untesting)这样的事情,并使用if语句使它足够灵活,有一个开始或结束标记,或两者都有,同时避免null ref错误:

var startMarker = '';// put any starting marker here
var endMarker = '<';// put the end marker here
var myText = String( $('#listItem').html() );
// if the start marker is found, take the string after it
myText = myText.split(startMarker)[1];        
// if the end marker is found, take the string before it
myText = myText.split(endMarker)[0];
console.log(myText); // output text between the first occurrence of the markers, assuming both markers exist.  If they don't this will throw an error, so some if statements to check params is probably in order...

I generally make utility functions for useful things like this, make them error free, and then rely on them frequently once solid, rather than always rewriting this type of string manipulation and risking null references etc. That way, you can re-use the function in lots of projects and never have to waste time on it again debugging why a string reference has an undefined reference error. Might not be the shortest 1 line code ever, but after you have the utility function, it is one line from then on. Note most of the code is just handling parameters being there or not to avoid errors :)

例如:

/**
* Get the text between two string markers.
**/
function textBetween(__string,__startMark,__endMark){
    var hasText = typeof __string !== 'undefined' && __string.length > 0;
    if(!hasText) return __string;
    var myText = String( __string );
    var hasStartMarker = typeof __startMark !== 'undefined' && __startMark.length > 0 && __string.indexOf(__startMark)>=0;
    var hasEndMarker =  typeof __endMark !== 'undefined' && __endMark.length > 0 && __string.indexOf(__endMark) > 0;
    if( hasStartMarker )  myText = myText.split(__startMark)[1];
    if( hasEndMarker )    myText = myText.split(__endMark)[0];
    return myText;
}

// now with 1 line from now on, and no jquery needed really, but to use your example:
var textWithNoHTML = textBetween( $('#listItem').html(), '', '<'); // should return text before first child HTML tag if the text is on page (use document ready etc)

这是一个老问题,但上面的答案效率很低。这里有一个更好的解决方案:

$.fn.myText = function() {
    var str = '';

    this.contents().each(function() {
        if (this.nodeType == 3) {
            str += this.textContent || this.innerText || '';
        }
    });

    return str;
};

然后这样做:

$("#foo").myText();

这对我来说是个好方法

   var text  =  $('#listItem').clone().children().remove().end().text();