本文介绍了尝试使用 DOMParser 解析 html 字符串时遇到的麻烦的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
片段来了:
html = "<!doctype html>";
html += "<html>";
html += "<head><title>test</title></head>";
html += "<body><p>test</p></body>";
html += "</html>";
parser = new DOMParser();
dom = parser.parseFromString (html, "text/html");
尝试执行这些行时出现错误:
here's come the error when trying to execute these lines :
错误:组件返回失败代码:0x80004001 (NS_ERROR_NOT_IMPLEMENTED) [nsIDOMParser.parseFromString]
我试图弄清楚发生了什么，但代码似乎是正确的，我在网上搜索，我来到这里没有任何线索.
I try to figure out what's going on but the code seems to be right and I searched on the web, i come here with no clues.
您以前遇到过这种故障吗?如果是，bug 隐藏在哪里?
have you encounter this failure before ? if yes, where's the bug hiding ?
推荐答案
您应该使用 JavaScript DOMParser 访问 innerHTML 和其他属性
我为你创建了小提琴 http://jsfiddle.net/CSAnZ/
/*
* DOMParser HTML extension
* 2012-02-02
*
* By Eli Grey, http://eligrey.com
* Public domain.
* NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
*/
/*! @source https://gist.github.com/1129031 */
/*global document, DOMParser*/
(function(DOMParser) {
"use strict";
var DOMParser_proto = DOMParser.prototype
, real_parseFromString = DOMParser_proto.parseFromString;
// Firefox/Opera/IE throw errors on unsupported types
try {
// WebKit returns null on unsupported types
if ((new DOMParser).parseFromString("", "text/html")) {
// text/html parsing is natively supported
return;
}
} catch (ex) {}
DOMParser_proto.parseFromString = function(markup, type) {
if (/^s*text/htmls*(?:;|$)/i.test(type)) {
var doc = document.implementation.createHTMLDocument("")
, doc_elt = doc.documentElement
, first_elt;
doc_elt.innerHTML = markup;
first_elt = doc_elt.firstElementChild;
if (doc_elt.childElementCount === 1
&& first_elt.localName.toLowerCase() === "html") {
doc.replaceChild(first_elt, doc_elt);
}
return doc;
} else {
return real_parseFromString.apply(this, arguments);
}
};
}(DOMParser));
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