diff --git a/source b/source
index 3dddb35d070..2dec969bbf2 100644
--- a/source
+++ b/source
@@ -11373,7 +11373,6 @@ https://software.hixie.ch/utilities/js/live-dom-viewer/?%3C%21DOCTYPE%20HTML%3E%
    <li><code data-x="handler-ondrag">ondrag</code></li>
    <li><code data-x="handler-ondragend">ondragend</code></li>
    <li><code data-x="handler-ondragenter">ondragenter</code></li>
-   <li><code data-x="handler-ondragexit">ondragexit</code></li>
    <li><code data-x="handler-ondragleave">ondragleave</code></li>
    <li><code data-x="handler-ondragover">ondragover</code></li>
    <li><code data-x="handler-ondragstart">ondragstart</code></li>
@@ -75781,14 +75780,13 @@ dictionary <dfn>DragEventInit</dfn> : <span>MouseEventInit</span> {
     <!--en-GB--><p id="dropEffect-initialisation">Set the <code
     data-x="dom-DataTransfer-dropEffect">dropEffect</code> attribute to "<code
     data-x="dom-DataTransfer-dropEffect-none">none</code>" if <var>e</var> is <code
-    data-x="event-dnd-dragstart">dragstart</code>, <code data-x="event-dnd-drag">drag</code>, <code
-    data-x="event-dnd-dragexit">dragexit</code>, or <code
-    data-x="event-dnd-dragleave">dragleave</code>; to the value corresponding to the <span>current
-    drag operation</span> if <var>e</var> is <code data-x="event-dnd-drop">drop</code> or
-    <code data-x="event-dnd-dragend">dragend</code>; and to a value based on the <code
+    data-x="event-dnd-dragstart">dragstart</code>, <code data-x="event-dnd-drag">drag</code>, or
+    <code data-x="event-dnd-dragleave">dragleave</code>; to the value corresponding to the
+    <span>current drag operation</span> if <var>e</var> is <code data-x="event-dnd-drop">drop</code>
+    or <code data-x="event-dnd-dragend">dragend</code>; and to a value based on the <code
     data-x="dom-DataTransfer-effectAllowed">effectAllowed</code> attribute's value and the
-    drag-and-drop source, as given by the following table, otherwise (i.e. if <var>e</var>
-    is <code data-x="event-dnd-dragenter">dragenter</code> or <code
+    drag-and-drop source, as given by the following table, otherwise (i.e. if <var>e</var> is <code
+    data-x="event-dnd-dragenter">dragenter</code> or <code
     data-x="event-dnd-dragover">dragover</code>):</p>
 
     <table>
@@ -75869,8 +75867,7 @@ dictionary <dfn>DragEventInit</dfn> : <span>MouseEventInit</span> {
    target</var>, and its <code data-x="dom-DragEvent-dataTransfer">dataTransfer</code> attribute to
    <var>dataTransfer</var>.</p></li>
 
-   <li><p>If <var>e</var> is not <code data-x="event-dnd-dragexit">dragexit</code>, <code
-   data-x="event-dnd-dragleave">dragleave</code>, or <code
+   <li><p>If <var>e</var> is not <code data-x="event-dnd-dragleave">dragleave</code> or <code
    data-x="event-dnd-dragend">dragend</code>, then initialize <var>event</var>'s <code
    data-x="dom-Event-cancelable">cancelable</code> attribute to true.</p></li>
 
@@ -76176,9 +76173,8 @@ dictionary <dfn>DragEventInit</dfn> : <span>MouseEventInit</span> {
      <li>
       <p>If the user is indicating a different <span>immediate user selection</span> than during the
       last iteration (or if this is the first iteration), and if this <span>immediate user
-      selection</span> is not the same as the <span>current target element</span>, then <span>fire a
-      DND event</span> named <code data-x="event-dnd-dragexit">dragexit</code> at the <span>current
-      target element</span>, and then update the <span>current target element</span> as follows:</p>
+      selection</span> is not the same as the <span>current target element</span>, then update the
+      <span>current target element</span> as follows:</p>
 
       <dl class="switch">
 
@@ -76534,15 +76530,6 @@ dictionary <dfn>DragEventInit</dfn> : <span>MouseEventInit</span> {
      <td>Reject <span>immediate user selection</span> as potential <span data-x="current target element">target element</span></td>
     </tr>
 
-    <tr>
-     <td><dfn><code data-x="event-dnd-dragexit">dragexit</code></dfn></td>
-     <td><span data-x="current target element">Previous target element</span></td>
-     <td>&mdash;</td>
-     <td><span data-x="concept-dnd-p">Protected mode</span>
-     <td>"<code data-x="dom-DataTransfer-dropEffect-none">none</code>"</td>
-     <td>None</td>
-    </tr>
-
     <tr>
      <td><dfn><code data-x="event-dnd-dragleave">dragleave</code></dfn></td>
      <td><span data-x="current target element">Previous target element</span></td>
@@ -76654,70 +76641,6 @@ dictionary <dfn>DragEventInit</dfn> : <span>MouseEventInit</span> {
   </div>
 
 
-<!--
-  <h4>Copy and paste</h4>
-
-  <p>Copy-and-paste is a form of drag-and-drop: the "copy" part is equivalent to dragging content to
-  another application (the "clipboard"), and the "paste" part is equivalent to dragging content
-  <em>from</em> another application.</p>
-
-  <p>Select-and-paste (a model used by mouse operations in the X Window System) is equivalent to a
-  drag-and-drop operation where the source is the selection.</p>
-
-
-  <div w-nodev>
-
-  <h5>Copy to clipboard</h5>
-
-  <p>When the user invokes a copy operation, the user agent must act as if the user had invoked a
-  drag on the current selection. If the drag-and-drop operation initiates, then the user agent must
-  act as if the user had indicated (as the <span>immediate user selection</span>) a hypothetical
-  application representing the clipboard. Then, the user agent must act as if the user had ended the
-  drag-and-drop operation without canceling it. If the drag-and-drop operation didn't get canceled,
-  the user agent should then follow the relevant platform-specific conventions for copy operations
-  (e.g. updating the clipboard).</p>
-
-  <p>The events involved in this process are the <code data-x="event-dnd-dragstart">dragstart</code>,
-  <code data-x="event-dnd-drag">drag</code>, and <code data-x="event-dnd-dragend">dragend</code> events.</p>
-
-
-  <h5>Cut to clipboard</h5>
-
-  <p>When the user invokes a cut operation, the user agent must act as if the user had invoked a
-  copy operation (see the previous section), followed, if the copy was completed successfully, by <a
-  href="#contenteditable-delete">a selection delete operation</a>.</p>
-
-  <p>The events involved in this process are the <code data-x="event-dnd-dragstart">dragstart</code>,
-  <code data-x="event-dnd-drag">drag</code>, and <code data-x="event-dnd-dragend">dragend</code> events.</p>
-
-
-  <h5>Paste from clipboard</h5>
-
-  <p>When the user invokes a clipboard paste operation, the user agent must act as if the user had
-  invoked a drag on a hypothetical application representing the clipboard, setting the data
-  associated with the drag as the content on the clipboard (in whatever formats are available).</p>
-
-  <p>Then, the user agent must act as if the user had indicated (as the <span>immediate user
-  selection</span>) the element with the keyboard focus, and then ended the drag-and-drop operation
-  without canceling it.</p>
-
-  <p>The events involved in this process are the <code data-x="event-dnd-dragenter">dragenter</code>,
-  <code data-x="event-dnd-dragover">dragover</code>, <code data-x="event-dnd-dragexit">dragexit</code>, <code
-  data-x="event-dnd-dragleave">dragleave</code>, and <code data-x="event-dnd-drop">drop</code> events.</p>
-
-
-  <h5>Paste from selection</h5>
-
-  <p>When the user invokes a selection paste operation, the user agent must act as if the user had
-  invoked a drag on the current selection, then indicated (as the <span>immediate user
-  selection</span>) the element with the keyboard focus, and then ended the drag-and-drop operation
-  without canceling it.</p>
-
-  <p>All the drag-and-drop events can be involved in this process.</p>
-
-  </div>
--->
-
 
 <!--ADD-TOPIC:Security-->
   <div w-nodev>
@@ -92249,7 +92172,6 @@ typedef <span>OnBeforeUnloadEventHandlerNonNull</span>? <dfn>OnBeforeUnloadEvent
     <tr><td><dfn data-export="" data-dfn-type="attribute" data-dfn-for="HTMLElement,Document,Window,GlobalEventHandlers"><code data-x="handler-ondrag">ondrag</code></dfn> <td> <code data-x="event-dnd-drag">drag</code>
     <tr><td><dfn data-export="" data-dfn-type="attribute" data-dfn-for="HTMLElement,Document,Window,GlobalEventHandlers"><code data-x="handler-ondragend">ondragend</code></dfn> <td> <code data-x="event-dnd-dragend">dragend</code>
     <tr><td><dfn data-export="" data-dfn-type="attribute" data-dfn-for="HTMLElement,Document,Window,GlobalEventHandlers"><code data-x="handler-ondragenter">ondragenter</code></dfn> <td> <code data-x="event-dnd-dragenter">dragenter</code>
-    <tr><td><dfn data-export="" data-dfn-type="attribute" data-dfn-for="HTMLElement,Document,Window,GlobalEventHandlers"><code data-x="handler-ondragexit">ondragexit</code></dfn> <td> <code data-x="event-dnd-dragexit">dragexit</code>
     <tr><td><dfn data-export="" data-dfn-type="attribute" data-dfn-for="HTMLElement,Document,Window,GlobalEventHandlers"><code data-x="handler-ondragleave">ondragleave</code></dfn> <td> <code data-x="event-dnd-dragleave">dragleave</code>
     <tr><td><dfn data-export="" data-dfn-type="attribute" data-dfn-for="HTMLElement,Document,Window,GlobalEventHandlers"><code data-x="handler-ondragover">ondragover</code></dfn> <td> <code data-x="event-dnd-dragover">dragover</code>
     <tr><td><dfn data-export="" data-dfn-type="attribute" data-dfn-for="HTMLElement,Document,Window,GlobalEventHandlers"><code data-x="handler-ondragstart">ondragstart</code></dfn> <td> <code data-x="event-dnd-dragstart">dragstart</code> <!-- widely used -->
@@ -92432,7 +92354,6 @@ typedef <span>OnBeforeUnloadEventHandlerNonNull</span>? <dfn>OnBeforeUnloadEvent
   attribute <span>EventHandler</span> <span data-x="handler-ondrag">ondrag</span>;
   attribute <span>EventHandler</span> <span data-x="handler-ondragend">ondragend</span>;
   attribute <span>EventHandler</span> <span data-x="handler-ondragenter">ondragenter</span>;
-  attribute <span>EventHandler</span> <span data-x="handler-ondragexit">ondragexit</span>;
   attribute <span>EventHandler</span> <span data-x="handler-ondragleave">ondragleave</span>;
   attribute <span>EventHandler</span> <span data-x="handler-ondragover">ondragover</span>;
   attribute <span>EventHandler</span> <span data-x="handler-ondragstart">ondragstart</span>;
@@ -120588,12 +120509,6 @@ interface <dfn>External</dfn> {
      <td> <code data-x="event-dnd-dragenter">dragenter</code> event handler
      <td> <span data-x="event handler content attributes">Event handler content attribute</span>
 
-    <tr>
-     <th id="ix-handler-ondragexit"> <code data-x="">ondragexit</code>
-     <td> <span data-x="handler-ondragexit">HTML elements</span>
-     <td> <code data-x="event-dnd-dragexit">dragexit</code> event handler
-     <td> <span data-x="event handler content attributes">Event handler content attribute</span>
-
     <tr>
      <th id="ix-handler-ondragleave"> <code data-x="">ondragleave</code>
      <td> <span data-x="handler-ondragleave">HTML elements</span>