如何使用javascript从特定的标签获取HTML文档中的所有textNodes？
问题描述：
如何从一组特定的标签中获取所有textNodes，而不使用xpath或treewalker（IE不允许您使用xpath& treewalker），在单个数组中说blockquote，em，h4，h6，p。 .please帮助我...如果脚本只是IE，它的确定。
How to get all textNodes from a group of specific tags say "blockquote,em,h4,h6,p" in a single array without using xpath or treewalker (IE doesn't allow you to use xpath & treewalker)..please help me...its ok if the script is IE only.
答
以下将让你所有的文本节点包含在匹配元素中：
The following will get you all text nodes that are contained within a matching element:
function getTextNodes(root, tagNamesArray) {
var textNodes = [];
var regex = new RegExp("^(" + tagNamesArray.join("|") + ")$", "i");
var insideMatchingElement = false;
function getNodes(node, insideMatchingElement) {
if (node.nodeType == 3 && insideMatchingElement) {
textNodes.push(node);
} else if (node.nodeType == 1) {
var childrenInsideMatchingElement = insideMatchingElement || regex.test(node.nodeName);
for (var child = node.firstChild; child; child = child.nextSibling) {
getNodes(child, childrenInsideMatchingElement);
}
}
}
getNodes(root);
return textNodes;
}
var textNodes = getTextNodes(document.body, ["blockquote","em","h4","h6","p"]);