diff --git a/Userland/Libraries/LibWeb/HTML/GlobalEventHandlers.h b/Userland/Libraries/LibWeb/HTML/GlobalEventHandlers.h
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+++ b/Userland/Libraries/LibWeb/HTML/GlobalEventHandlers.h
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+/*
+ * Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#define ENUMERATE_GLOBAL_EVENT_HANDLERS(E)                    \
+    E(onabort, HTML::EventNames::abort)                       \
+    E(onauxclick, "auxclick")                                 \
+    E(onblur, HTML::EventNames::blur)                         \
+    E(oncancel, HTML::EventNames::cancel)                     \
+    E(oncanplay, "canplay")                                   \
+    E(oncanplaythrough, "canplaythrough")                     \
+    E(onchange, HTML::EventNames::change)                     \
+    E(onclick, UIEvents::EventNames::click)                   \
+    E(onclose, HTML::EventNames::close)                       \
+    E(oncontextmenu, HTML::EventNames::contextmenu)           \
+    E(oncuechange, "cuechange")                               \
+    E(ondblclick, "dblclick")                                 \
+    E(ondrag, "drag")                                         \
+    E(ondragend, "dragend")                                   \
+    E(ondragenter, "dragenter")                               \
+    E(ondragleave, "dragleave")                               \
+    E(ondragover, "dragover")                                 \
+    E(ondragstart, "dragstart")                               \
+    E(ondrop, "drop")                                         \
+    E(ondurationchange, "durationchange")                     \
+    E(onemptied, "emptied")                                   \
+    E(onended, "ended")                                       \
+    E(onerror, HTML::EventNames::error)                       \
+    E(onfocus, "focus")                                       \
+    E(onformdata, "formdata")                                 \
+    E(oninput, HTML::EventNames::input)                       \
+    E(oninvalid, HTML::EventNames::invalid)                   \
+    E(onkeydown, "keydown")                                   \
+    E(onkeypress, "keypress")                                 \
+    E(onkeyup, "keyup")                                       \
+    E(onload, HTML::EventNames::load)                         \
+    E(onloadeddata, "loadeddata")                             \
+    E(onloadedmetadata, "loadedmetadata")                     \
+    E(onloadstart, "loadstart")                               \
+    E(onmousedown, UIEvents::EventNames::mousedown)           \
+    E(onmouseenter, UIEvents::EventNames::mouseenter)         \
+    E(onmouseleave, UIEvents::EventNames::mouseleave)         \
+    E(onmousemove, UIEvents::EventNames::mousedown)           \
+    E(onmouseout, UIEvents::EventNames::mouseout)             \
+    E(onmouseover, UIEvents::EventNames::mouseover)           \
+    E(onmouseup, UIEvents::EventNames::mouseup)               \
+    E(onpause, "pause")                                       \
+    E(onplay, "play")                                         \
+    E(onplaying, "playing")                                   \
+    E(onprogress, "progress")                                 \
+    E(onratechange, "ratechange")                             \
+    E(onreset, "reset")                                       \
+    E(onresize, "resize")                                     \
+    E(onscroll, "scroll")                                     \
+    E(onsecuritypolicyviolation, "securitypolicyviolation")   \
+    E(onseeked, "seeked")                                     \
+    E(onseeking, "seeking")                                   \
+    E(onselect, HTML::EventNames::select)                     \
+    E(onslotchange, "slotchange")                             \
+    E(onstalled, "stalled")                                   \
+    E(onsubmit, HTML::EventNames::submit)                     \
+    E(onsuspend, "suspend")                                   \
+    E(ontimeupdate, "timeupdate")                             \
+    E(ontoggle, "toggle")                                     \
+    E(onvolumechange, "volumechange")                         \
+    E(onwaiting, "waiting")                                   \
+    E(onwebkitanimationend, "webkitanimationend")             \
+    E(onwebkitanimationiteration, "webkitanimationiteration") \
+    E(onwebkitanimationstart, "webkitanimationstart")         \
+    E(onwebkittransitionend, "webkittransitionend")           \
+    E(onwheel, "wheel")