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html5/spec Overview.html,1.2540,1.2541

From: Ian Hickson via cvs-syncmail <cvsmail@w3.org>
Date: Wed, 15 Jul 2009 01:29:33 +0000
To: public-html-commits@w3.org
Message-Id: <E1MQtJO-0007nm-0P@lionel-hutz.w3.org>
Update of /sources/public/html5/spec
In directory hutz:/tmp/cvs-serv29974

Modified Files:
	Overview.html 
Log Message:
Add an example of a script moving nodes the parser is parsing. (whatwg r3411)

Index: Overview.html
===================================================================
RCS file: /sources/public/html5/spec/Overview.html,v
retrieving revision 1.2540
retrieving revision 1.2541
diff -u -d -r1.2540 -r1.2541
--- Overview.html	15 Jul 2009 00:14:16 -0000	1.2540
+++ Overview.html	15 Jul 2009 01:29:30 -0000	1.2541
@@ -1088,7 +1088,8 @@
       <ol>
        <li><a href="#misnested-tags:-b-i-b-i"><span class="secno">9.2.8.1 </span>Misnested tags: &lt;b&gt;&lt;i&gt;&lt;/b&gt;&lt;/i&gt;</a></li>
        <li><a href="#misnested-tags:-b-p-b-p"><span class="secno">9.2.8.2 </span>Misnested tags: &lt;b&gt;&lt;p&gt;&lt;/b&gt;&lt;/p&gt;</a></li>
-       <li><a href="#unexpected-markup-in-tables"><span class="secno">9.2.8.3 </span>Unexpected markup in tables</a></ol></ol></li>
+       <li><a href="#unexpected-markup-in-tables"><span class="secno">9.2.8.3 </span>Unexpected markup in tables</a></li>
+       <li><a href="#scripts-that-modify-the-page-as-it-is-being-parsed"><span class="secno">9.2.8.4 </span>Scripts that modify the page as it is being parsed</a></ol></ol></li>
    <li><a href="#namespaces"><span class="secno">9.3 </span>Namespaces</a></li>
    <li><a href="#serializing-html-fragments"><span class="secno">9.4 </span>Serializing HTML fragments</a></li>
    <li><a href="#parsing-html-fragments"><span class="secno">9.5 </span>Parsing HTML fragments</a></li>
@@ -58953,7 +58954,66 @@
   result in yet another <code><a href="#the-b-element">b</a></code> element being created, this
   time after the table:</p>
 
-  <ul class="domTree"><li class="t1"><code><a href="#the-html-element">html</a></code><ul><li class="t1"><code><a href="#the-head-element">head</a></code><li class="t1"><code><a href="#the-body-element">body</a></code><ul><li class="t1"><code><a href="#the-b-element">b</a></code><li class="t1"><code><a href="#the-b-element">b</a></code><ul><li class="t3"><code>#text</code>: <span title="">bbb</span></ul><li class="t1"><code><a href="#the-table-element">table</a></code><ul><li class="t1"><code><a href="#the-tbody-element">tbody</a></code><ul><li class="t1"><code><a href="#the-tr-element">tr</a></code><ul><li class="t1"><code><a href="#the-td-element">td</a></code><ul><li class="t3"><code>#text</code>: <span title="">aaa</span></ul></ul></ul></ul><li class="t1"><code><a href="#the-b-element">b</a></code><ul><li class="t3"><code>#text</code>: <span title="">ccc</span></ul></ul></ul></ul><h3 id="namespaces"><span class="secno">9.3 </span>Namespaces</h3>
+  <ul class="domTree"><li class="t1"><code><a href="#the-html-element">html</a></code><ul><li class="t1"><code><a href="#the-head-element">head</a></code><li class="t1"><code><a href="#the-body-element">body</a></code><ul><li class="t1"><code><a href="#the-b-element">b</a></code><li class="t1"><code><a href="#the-b-element">b</a></code><ul><li class="t3"><code>#text</code>: <span title="">bbb</span></ul><li class="t1"><code><a href="#the-table-element">table</a></code><ul><li class="t1"><code><a href="#the-tbody-element">tbody</a></code><ul><li class="t1"><code><a href="#the-tr-element">tr</a></code><ul><li class="t1"><code><a href="#the-td-element">td</a></code><ul><li class="t3"><code>#text</code>: <span title="">aaa</span></ul></ul></ul></ul><li class="t1"><code><a href="#the-b-element">b</a></code><ul><li class="t3"><code>#text</code>: <span title="">ccc</span></ul></ul></ul></ul><h5 id="scripts-that-modify-the-page-as-it-is-being-parsed"><span class="secno">9.2.8.4 </span>Scripts that modify the page as it is being parsed</h5>
+
+  <p><i>This section is non-normative.</i></p>
+
+  <p>Consider the following markup, which for this example we will
+  assume is the document with <a href="#url">URL</a> <code title="">http://example.com/inner</code>, being rendered as the
+  content of an <code><a href="#the-iframe-element">iframe</a></code> in another document with the
+  <a href="#url">URL</a> <code title="">http://example.com/outer</code>:</p>
+
+  <pre>&lt;div id=a&gt;
+ &lt;script&gt;
+  var div = document.getElementById('a');
+  parent.document.body.appendChild(div);
+ &lt;/script&gt;
+ &lt;script&gt;
+  alert(document.URL);
+ &lt;/script&gt;
+&lt;/div&gt;
+&lt;script&gt;
+ alert(document.URL);
+&lt;/script&gt;</pre>
+
+  <p>Up to the first "script" end tag, before the script is parsed,
+  the result is relatively straightforward:</p>
+
+  <ul class="domTree"><li class="t1"><code><a href="#the-html-element">html</a></code><ul><li class="t1"><code><a href="#the-head-element">head</a></code><li class="t1"><code><a href="#the-body-element">body</a></code><ul><li class="t1"><code><a href="#the-div-element">div</a></code> <span class="t2"><code class="attribute name">id</code>="<code class="attribute value"><a href="#the-a-element">a</a></code>"</span><ul><li class="t3"><code>#text</code>: <span title="">
+ </span><li class="t1"><code><a href="#script">script</a></code><ul><li class="t3"><code>#text</code>: <pre>  var div = document.getElementById('a');
+  parent.document.body.appendChild(div);</pre></ul></ul></ul></ul></ul><p>After the script is parsed, though, the <code><a href="#the-div-element">div</a></code> element
+  and its child <code><a href="#script">script</a></code> element are gone:</p>
+
+  <ul class="domTree"><li class="t1"><code><a href="#the-html-element">html</a></code><ul><li class="t1"><code><a href="#the-head-element">head</a></code><li class="t1"><code><a href="#the-body-element">body</a></code></ul></ul><p>They are, at this point, in the <code>Document</code> of the
+  aforementioned outer <a href="#browsing-context">browsing context</a>. However, the
+  <a href="#stack-of-open-elements">stack of open elements</a> <em>still contains the
+  <code><a href="#the-div-element">div</a></code> element</em>.</p>
+
+  <p>Thus, when the second <code><a href="#script">script</a></code> element is parsed, it
+  is inserted <em>into the outer <code>Document</code>
+  object</em>.</p>
+
+  <p>This also means that the <a href="#script-s-global-object">script's global object</a> is
+  the outer <a href="#browsing-context">browsing context</a>'s <code><a href="#window">Window</a></code>
+  object, <em>not</em> the <code><a href="#window">Window</a></code> object inside the
+  <code><a href="#the-iframe-element">iframe</a></code>.</p>
+
+  <p class="note">This isn't a security problem since the script that
+  moves the <code><a href="#the-div-element">div</a></code> into the outer <code>Document</code> can
+  only do so because they have the two <code>Document</code> object
+  have the same <a href="#origin-0">origin</a>.</p>
+
+  <p>Thus, the first alert says "http://example.com/outer".</p>
+
+  <p>Once the <code><a href="#the-div-element">div</a></code> element's end tag is parsed, the
+  <code><a href="#the-div-element">div</a></code> element is popped off the stack, and so the next
+  <code><a href="#script">script</a></code> element is in the inner <code>Document</code>:</p>
+
+  <ul class="domTree"><li class="t1"><code><a href="#the-html-element">html</a></code><ul><li class="t1"><code><a href="#the-head-element">head</a></code><li class="t1"><code><a href="#the-body-element">body</a></code><ul><li class="t1"><code><a href="#script">script</a></code><ul><li class="t3"><code>#text</code>: <span title="">alert(document.URL);</span></ul></ul></ul></ul><p>This second alert will say "http://example.com/inner".</p>
+
+
+
+  <h3 id="namespaces"><span class="secno">9.3 </span>Namespaces</h3>
 
   <p>The <dfn id="html-namespace-0">HTML namespace</dfn> is: <code>http://www.w3.org/1999/xhtml</code></p>
 
Received on Wednesday, 15 July 2009 01:29:42 GMT

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