[giow] (0) Make it clear that disabling a feature should truly remove…

… it, not just stub it out. Fixing http://www.w3.org/Bugs/Public/show_bug.cgi?id=8536 git-svn-id: http://svn.whatwg.org/webapps@4693 340c8d12-0b0e-0410-8428-c7bf67bfef74
whatwg · Feb 12, 2010 · d774be8 · d774be8
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diff --git a/complete.html b/complete.html
@@ -2603,6 +2603,16 @@ <h4 id=extensibility><span class=secno>2.2.2 </span>Extensibility</h4>
 
   </div>
 
+  <p>When support for a feature is disabled (e.g. as an emergency
+  measure to mitigate a security problem, or to aid in development, or
+  for performance reasons), user agents must act as if they had no
+  support for the feature whatsoever, and as if the feature was not
+  mentioned in this specification. For example, if a particular
+  feature is accessed via an attribute in a Web IDL interface, the
+  attribute itself would be omitted from the objects that implement
+  that interface &mdash; leaving the attribute on the object but
+  making it return null or throw an exception is insufficient.</p>
+
   <hr><p>When vendor-neutral extensions to this specification are needed,
   either this specification can be updated accordingly, or an
   extension specification can be written that overrides the
@@ -69222,6 +69232,7 @@ <h4 id=the-localstorage-attribute><span class=secno>11.2.3 </span>The <code titl
    origin</a> is not the <a href=#same-origin>same origin</a> as the
    <code>Document</code>'s <a href=#origin>origin</a>, then throw a
    <code><a href=#security_err>SECURITY_ERR</a></code> exception and abort these steps.</li>
+   <!-- XXX should do this on getItem()/setItem()/enumerating etc -->
 
    <li><p>If the <code>Document</code>'s <a href=#origin>origin</a> is not a
    scheme/host/port tuple, then throw a <code><a href=#security_err>SECURITY_ERR</a></code>

diff --git a/index b/index
@@ -2502,6 +2502,16 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
 
   </div>
 
+  <p>When support for a feature is disabled (e.g. as an emergency
+  measure to mitigate a security problem, or to aid in development, or
+  for performance reasons), user agents must act as if they had no
+  support for the feature whatsoever, and as if the feature was not
+  mentioned in this specification. For example, if a particular
+  feature is accessed via an attribute in a Web IDL interface, the
+  attribute itself would be omitted from the objects that implement
+  that interface &mdash; leaving the attribute on the object but
+  making it return null or throw an exception is insufficient.</p>
+
   <hr><p>When vendor-neutral extensions to this specification are needed,
   either this specification can be updated accordingly, or an
   extension specification can be written that overrides the

diff --git a/source b/source
@@ -1519,6 +1519,16 @@ a.setAttribute('href', 'http://example.com/'); // change the content attribute d
 
   </div>
 
+  <p>When support for a feature is disabled (e.g. as an emergency
+  measure to mitigate a security problem, or to aid in development, or
+  for performance reasons), user agents must act as if they had no
+  support for the feature whatsoever, and as if the feature was not
+  mentioned in this specification. For example, if a particular
+  feature is accessed via an attribute in a Web IDL interface, the
+  attribute itself would be omitted from the objects that implement
+  that interface &mdash; leaving the attribute on the object but
+  making it return null or throw an exception is insufficient.</p>
+
   <hr>
 
   <p>When vendor-neutral extensions to this specification are needed,
@@ -77885,6 +77895,7 @@ interface <span>WindowLocalStorage</span> {
    origin</span> is not the <span>same origin</span> as the
    <code>Document</code>'s <span>origin</span>, then throw a
    <code>SECURITY_ERR</code> exception and abort these steps.</p></li>
+   <!-- XXX should do this on getItem()/setItem()/enumerating etc -->
 
    <li><p>If the <code>Document</code>'s <span>origin</span> is not a
    scheme/host/port tuple, then throw a <code>SECURITY_ERR</code>