Abstract away creating an attribute from toggleAttribute() and setAtt…

…ribute()

dom.bs

@@ -6189,6 +6189,22 @@ in an <a for="/">element</a> <var>element</var>, run these steps:
 
 <hr>
 
+
+To <dfn export id=concept-element-attributes-set-by-name>create an attribute by value</dfn>
+given a <var>qualifiedName</var>, <var>value</var> and <a for="/">element</a> <var>element</var>, run these steps:
+
+<ol>
+ <li><p>Create an <a>attribute</a> whose
+ <a for="Attr">local name</a> is <var>qualifiedName</var>, <a for=Attr>value</a> is
+ <var>value</var>, and <a for=Node>node document</a> is <a>context object</a>'s
+ <a for=Node>node document</a>.
+
+ <li><a lt="append an attribute">Append</a> this <a>attribute</a> to
+ <a>element</a>
+
+ <li>Return.
+</ol>
+
 To <dfn export id=concept-element-attributes-get-valid-by-name>get a valid attribute by name</dfn>
 given a <var>qualifiedName</var>, and <a for="/">element</a> <var>element</var>, run these steps:
 
@@ -6548,11 +6564,8 @@ method, when invoked, must run these steps:
 <ol>
  <li><p>Let <var>qualifiedName</var> and <var>attribute</var> be the result of running <a>get a valid attribute by name</a> given the <var>qualifiedName</var> and <a>context object</a>
 
- <li><p>If <var>attribute</var> is null, create an <a>attribute</a> whose
- <a for="Attr">local name</a> is <var>qualifiedName</var>, <a for=Attr>value</a> is
- <var>value</var>, and <a for=Node>node document</a> is <a>context object</a>'s
- <a for=Node>node document</a>, then <a lt="append an attribute">append</a> this <a>attribute</a> to
- <a>context object</a>, and then return.
+
+ <li><p>If <var>attribute</var> is null, run <a>create an attribute by value</a> given the <var>qualifiedName</var>, <var>value</var> and <a>context object</a>, and then return.
 
  <li><p><a lt="change an attribute">Change</a> <var>attribute</var> from <a>context object</a> to
  <var>value</var>.
@@ -6606,13 +6619,7 @@ method, when invoked, must run these steps:
   <ol>
    <li><p>If <var>force</var> is given and is false, return false.
 
-   <li><p>Create an <a>attribute</a> whose
-   <a for="Attr">local name</a> is <var>qualifiedName</var>, <a for=Attr>value</a> is the empty
-   string, and <a for=Node>node document</a> is the <a>context object</a>'s
-   <a for=Node>node document</a>.
-
-   <li><a lt="append an attribute">Append</a> this <a>attribute</a>
-   to the <a>context object</a>.
+   <li><p>Run <a>create an attribute by value</a> given the <var>qualifiedName</var>, <var>the empty string</var> and <a>context object</a>.
 
    <li>Return true.
   </ol>