innerText / textContent与检索每个文本节点

问题描述

我听说使用 el.innerText || el.textContent 可能会产生不可靠的结果，这就是为什么我一直坚持使用以下功能过去：

I've heard that using el.innerText||el.textContent can yield unreliable results, and that's why I've always insisted on using the following function in the past:

function getText(node) {

    if (node.nodeType === 3) {
        return node.data;
    }

    var txt = '';

    if (node = node.firstChild) do {
        txt += getText(node);
    } while (node = node.nextSibling);

    return txt;

}

此函数遍历元素中的所有节点，并收集所有文本节点的文本和后代中的文本：

This function goes through all nodes within an element and gathers the text of all text nodes, and text within descendants:

例如

<div id="x">foo <em>foo...</em> foo</div>

结果：

getText(document.getElementById('x')); // => "foo foo... foo"

我相当肯定那里是使用 innerText 和 textContent 的问题，但我无法在任何地方找到确定的列表，而我开始怀疑是否只是传闻。

I'm quite sure there are issues with using innerText and textContent, but I've not been able to find a definitive list anywhere and I am starting to wonder if it's just hearsay.

任何人都可以提供任何关于textContent / innerText可能缺乏可靠性的信息？

Can anyone offer any information about the possibly lacking reliability of textContent/innerText?

编辑：Kangax发现了这个好的答案 -

EDIT: Found this great answer by Kangax -- 'innerText' works in IE, but not in Firefox

推荐答案

这是关于终端和空白 - 浏览器在这方面是非常不一致的，特别是在Internet Explorer中。执行遍历是在所有浏览器中获得相同结果的确定方式。

It's all about endlines and whitespace - browsers are very inconsistent in this regard, especially so in Internet Explorer. Doing the traversal is a sure-fire way to get identical results in all browsers.

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