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---
title: DOMParser
slug: Web/API/DOMParser
tags:
- DOMParser SVG XML
translation_of: Web/API/DOMParser
---
<p>{{APIRef("DOM")}}{{SeeCompatTable}}</p>
<p><code>DOMParser可以將XML或是HTML格式的字串轉成</code>DOM <a href="/en-US/docs/DOM/document">文件</a>. <code>DOMParser</code>的規格請參閱<a href="http://html5.org/specs/dom-parsing.html">DOM解譯與串流化</a>.</p>
<p>請注意<a href="/en-US/docs/DOM/XMLHttpRequest" title="DOM/XMLHttpRequest">XMLHttpRequest</a>解譯的是URL連結內容裡的XML與HTML文件.</p>
<h2 id="產生一個_DOMParser">產生一個 DOMParser</h2>
<p>" <code>new DOMParser()" 可產生DOMParser</code>.</p>
<p><code>關於如何在Firefox外掛程式中產生DOMParser,</code>請參考<code><a href="/en-US/docs/nsIDOMParser" title="nsIDOMParser">nsIDOMParser</a>文件</code></p>
<h2 id="解譯_XML">解譯 XML</h2>
<p>產生解譯物件後，請呼叫<code>parseFromString方法函式來將XML字串轉換成DOM物件</code>:</p>
<pre class="brush: js">var parser = new DOMParser();
var doc = parser.parseFromString(stringContainingXMLSource, "application/xml");
</pre>
<h3 id="Error_handling" name="Error_handling">錯誤處理</h3>
<p>請注意如果解譯過程出錯,目前的<code>DOMParser不會丟出異常物件(exception)，但是會回傳一個錯誤文件</code>(請看程式臭蟲{{Bug(45566)}}):</p>
<pre class="brush:xml"><parsererror xmlns="http://www.mozilla.org/newlayout/xml/parsererror.xml">
(error description)
<sourcetext>(a snippet of the source XML)</sourcetext>
</parsererror>
</pre>
<p>解譯錯誤也會記錄在錯誤終端機中（<a href="/en-US/docs/Error_Console" title="Error Console">Error Console</a>）, 紀錄裡頭的文件URI (如下) 則為錯誤來源.</p>
<h2 id="解譯_SVG_或_HTML_文件">解譯 SVG 或 HTML 文件</h2>
<p><code>DOMParser也可以用來解譯 </code>SVG 文件 {{geckoRelease("10.0")}} 或是 HTML 文件 {{geckoRelease("12.0")}}. 可以依 MIME 格式，輸出三種不同格式. 如果MIME 格式是 <code>text/xml</code>,輸出的格式為 <code>XMLDocument</code>, 如果 MIME 格式是 <code>image/svg+xml</code>, 輸出格式為 <code>SVGDocument,</code> 如果 MIME 格式是 <code>text/html</code>, 輸出格式則為 <code>HTMLDocument</code>.</p>
<pre class="brush: js">var parser = new DOMParser();
var doc = parser.parseFromString(stringContainingXMLSource, "application/xml");
// returns a Document, but not a SVGDocument nor a HTMLDocument
parser = new DOMParser();
doc = parser.parseFromString(stringContainingXMLSource, "image/svg+xml");
// returns a SVGDocument, which also is a Document.
parser = new DOMParser();
doc = parser.parseFromString(stringContainingHTMLSource, "text/html");
// returns a HTMLDocument, which also is a Document.
</pre>
<h3 id="其他瀏覽器可用的DOMParser_HTML_外掛程式">其他瀏覽器可用的DOMParser HTML 外掛程式</h3>
<pre class="brush: js">/*
* DOMParser HTML extension
* 2012-09-04
*
* 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
proto = DOMParser.prototype
, nativeParse = <span style="font-size: 1rem;">proto</span><span style="font-size: 1rem;">.parseFromString</span>
;
// 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) {}
<span style="font-size: 1rem;">proto</span><span style="font-size: 1rem;">.parseFromString = function(markup, type) {</span>
if (/^\s*text\/html\s*(?:;|$)/i.test(type)) {
var
doc = document.implementation.createHTMLDocument("")
;
if (markup.toLowerCase().indexOf('<!doctype') > -1) {
doc.documentElement.innerHTML = markup;
}
else {
doc.body.innerHTML = markup;
}
return doc;
} else {
return <span style="font-size: 1rem;">nativeParse</span><span style="font-size: 1rem;">.apply(this, arguments);</span>
}
};
}(DOMParser));
</pre>
<h3 id="DOMParser_from_ChromeJSMXPCOMPrivileged_Scope">DOMParser from Chrome/JSM/XPCOM/Privileged Scope</h3>
<p>See article here: <a href="/en-US/docs/nsIDOMParser">nsIDOMParser</a></p>
<h2 id="Browser_compatibility" name="Browser_compatibility">瀏覽器相容性</h2>
{{Compat("api.DOMParser")}}
<h2 id="See_also" name="See_also">參考資料</h2>
<ul>
<li><a href="/en-US/docs/Parsing_and_serializing_XML" title="Parsing_and_serializing_XML">Parsing and serializing XML</a></li>
<li><a href="/en-US/docs/DOM/XMLHttpRequest" title="DOM/XMLHttpRequest">XMLHttpRequest</a></li>
<li><a href="/en-US/docs/XMLSerializer" title="XMLSerializer">XMLSerializer</a></li>
<li><a href="/en-US/Add-ons/Code_snippets/HTML_to_DOM">Parsing HTML to DOM</a></li>
</ul>
|
