diff --git a/dom.bs b/dom.bs
index 491e2691..9d7b0741 100644
--- a/dom.bs
+++ b/dom.bs
@@ -6514,6 +6514,7 @@ interface Element : Node {
   [CEReactions] attribute DOMString className;
   [SameObject, PutForwards=value] readonly attribute DOMTokenList classList;
   [CEReactions, Unscopable] attribute DOMString slot;
+  [SameObject, PutForwards=value] readonly attribute DOMTokenList part;
 
   boolean hasAttributes();
   [SameObject] readonly attribute NamedNodeMap attributes;
@@ -7152,6 +7153,10 @@ claims as to whether using them is conforming or not.
  <dt><code><var>element</var> . <a attribute for=Element>slot</a> [ = <var>value</var> ]</code>
  <dd><p>Returns the value of <var>element</var>'s <code>slot</code> content attribute. Can be set to
  change it.
+
+ <dt><code><var>element</var> . <a attribute for=Element>part</a></code>
+ <dd><p>Allows for manipulation of <var>element</var>'s <code>part</code> content attribute as a
+ set of whitespace-separated tokens through a {{DOMTokenList}} object.
 </dl>
 
 <p>IDL attributes that are defined to <dfn for=Attr id=concept-reflect>reflect</dfn> a string
@@ -7182,9 +7187,14 @@ particular {{DOMTokenList}} object are also known as the <a for=/>element</a>'s
 <p>The <dfn attribute for=Element><code>slot</code></dfn> attribute must <a for=Attr>reflect</a>
 "<code>slot</code>".
 
-<p class=note><code>id</code>, <code>class</code>, and <code>slot</code> are effectively
-superglobal attributes as they can appear on any element, regardless of that element's
-namespace.</p>
+<p>The <dfn attribute for=Element><code>part</code></dfn> getter steps are to return a
+{{DOMTokenList}} object whose associated <a for=/>element</a> is <a>this</a> and whose associated
+<a>attribute</a>'s <a for=Attr>local name</a> is <code>part</code>. The <a>token set</a> of this
+particular {{DOMTokenList}} object are also known as the <a for=/>element</a>'s parts.
+
+<p class=note><code>id</code>, <code>class</code>, <code>slot</code>, <code>part</code>, and
+<code>exportparts</code> are effectively superglobal attributes as they can appear on any element,
+regardless of that element's namespace.</p>
 
 <hr>
 
@@ -10836,6 +10846,7 @@ Chris Rebert,
 Cyrille Tuzi,
 Dan Burzo,
 Daniel Clark,
+Daniel Ethridge, <!-- wlib on GitHub -->
 Daniel Glazman,
 Darien Maillet Valentine<!-- bhathos; GitHub -->,
 Darin Fisher,