在javascript中获取没有子元素的元素的文本 [英] get text of an element without children in javascript
问题描述
如何获取没有子元素的元素的文本?
element.textContent和element.innerText似乎都不起作用.
How do I get the text of an element without the children?
Neither element.textContent nor element.innerText seem to be working.
HTML:
<body>
<h1>Test Heading</h1>
<div>
Awesome video and music. Thumbs way up. Love it. Happy weekend to you and your family. Love, Sasha
</div>
</body>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
<script type="text/javascript">
fool("body");
</script>
这是fool函数:
jQuery.fn.justtext = function(text) {
return $(this).clone()
.children()
.remove()
.end()
.text();
};
function fool(el) {
reverse(el);
function reverse(el) {
$(el).children().each(function() {
if($(this).children().length > 0) {
reverse(this);
if($(this).justtext() != "")
reverseText(this);
} else {
reverseText(this)
}
});
}
function reverseText(el){
var text = el.textContent;
var frag = text.toString().split(/ /);
var foo = "";
var punctation_marks = [".",",","?","!"," ",":",";"];
for(i in frag){
if(punctation_marks.indexOf(frag[i]) == -1)
foo += actualReverse(frag[i],punctation_marks) + " ";
}
el.textContent = foo;
}
function actualReverse(text,punctation_marks) {
return (punctation_marks.indexOf(text.split("")[text.split("").length-1]) != -1)?text.split("").slice(0,text.split("").length-1).reverse().join("") + text.split("")[text.split("").length-1] : text.split("").reverse().join("");
}
}
编辑:使用node.nodeType并没有真正的帮助，原因如下:
对以下HTML进行成像
edit: using node.nodeType doesn't really help and here's why:
Imaginge the following HTML
<td class="gensmall">
Last visit was: Sat Mar 31, 2012 10:50 am
<br>
<a href="./search.php?search_id=unanswered">View unanswered posts</a> | <a href="./search.php?search_id=active_topics">View active topics</a>
</td>
如果我使用nodeType，则只会更改a元素的文本，而不会更改td本身(上次访问...")
if I'd use nodeType, only the text of the a element would change , but not the td itself ("last visit....")
推荐答案
只需找到文本节点:
var element = document.getElementById('whatever'), text = '';
for (var i = 0; i < element.childNodes.length; ++i)
if (element.childNodes[i].nodeType === 3)
text += element.childNodes[i].textContent;
edit —如果您想要后代(子级")节点中的文本，并且(现在很明显)您正在使用jQuery:
edit — if you want the text in descendant ("children") nodes, and (as is now apparent) you're using jQuery:
$.fn.allText = function() {
var text = '';
this.each(function() {
$(this).contents().each(function() {
if (this.nodeType == Node.TEXT_NODE)
text += this.textContent;
else if (this.nodeType == Node.ELEMENT_NODE)
text += $(this).allText();
});
});
return text;
};
请稍等，我将进行测试:-)(似乎可以正常工作)
Hold on and I'll test that out :-) (seems to work)
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