LibWeb: Add a bunch of missing CEReactions

This is almost guaranteed not to be all CEReactions we need to add, but
this puts us in a much better situation.

61 files changed, 259 insertions, 256 deletions

diff --git a/Userland/Libraries/LibWeb/DOM/Document.idl b/Userland/Libraries/LibWeb/DOM/Document.idl
index 0615b780af..a2d285b1c4 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.idl
+++ b/Userland/Libraries/LibWeb/DOM/Document.idl
@@ -74,8 +74,8 @@ interface Document : Node {
     // FIXME: Should return an HTMLAllCollection
     readonly attribute HTMLCollection all;
 
-    Element createElement(DOMString tagName, optional (DOMString or ElementCreationOptions) options = {});
-    Element createElementNS(DOMString? namespace, DOMString qualifiedName, optional (DOMString or ElementCreationOptions) options = {});
+    [CEReactions, NewObject] Element createElement(DOMString tagName, optional (DOMString or ElementCreationOptions) options = {});
+    [CEReactions, NewObject] Element createElementNS(DOMString? namespace, DOMString qualifiedName, optional (DOMString or ElementCreationOptions) options = {});
     DocumentFragment createDocumentFragment();
     Text createTextNode(DOMString data);
     Comment createComment(DOMString data);
@@ -96,13 +96,13 @@ interface Document : Node {
     readonly attribute DocumentType? doctype;
 
     readonly attribute Element? documentElement;
-    attribute HTMLElement? body;
+    [CEReactions] attribute HTMLElement? body;
     readonly attribute HTMLHeadElement? head;
     readonly attribute HTMLScriptElement? currentScript;
 
     readonly attribute DOMString readyState;
 
-    attribute DOMString title;
+    [CEReactions] attribute DOMString title;
 
     boolean queryCommandSupported(DOMString commandId);
     readonly boolean hidden;
diff --git a/Userland/Libraries/LibWeb/DOM/Element.idl b/Userland/Libraries/LibWeb/DOM/Element.idl
index aeecf4d9ce..f5d607d957 100644
--- a/Userland/Libraries/LibWeb/DOM/Element.idl
+++ b/Userland/Libraries/LibWeb/DOM/Element.idl
@@ -27,12 +27,12 @@ interface Element : Node {
     readonly attribute DOMString tagName;
 
     DOMString? getAttribute(DOMString qualifiedName);
-    undefined setAttribute(DOMString qualifiedName, DOMString value);
+    [CEReactions] undefined setAttribute(DOMString qualifiedName, DOMString value);
     [CEReactions] undefined setAttributeNS(DOMString? namespace , DOMString qualifiedName , DOMString value);
     [CEReactions] Attr? setAttributeNode(Attr attr);
     [CEReactions] Attr? setAttributeNodeNS(Attr attr);
 
-    undefined removeAttribute(DOMString qualifiedName);
+    [CEReactions] undefined removeAttribute(DOMString qualifiedName);
     [CEReactions] boolean toggleAttribute(DOMString qualifiedName, optional boolean force);
     boolean hasAttribute(DOMString qualifiedName);
     boolean hasAttributes();
@@ -45,8 +45,8 @@ interface Element : Node {
     HTMLCollection getElementsByTagNameNS(DOMString? namespace, DOMString localName);
     HTMLCollection getElementsByClassName(DOMString className);
 
-    [Reflect] attribute DOMString id;
-    [Reflect=class] attribute DOMString className;
+    [Reflect, CEReactions] attribute DOMString id;
+    [Reflect=class, CEReactions] attribute DOMString className;
     [SameObject, PutForwards=value] readonly attribute DOMTokenList classList;
 
     ShadowRoot attachShadow(ShadowRootInit init);
diff --git a/Userland/Libraries/LibWeb/DOM/Node.idl b/Userland/Libraries/LibWeb/DOM/Node.idl
index 8ac5cdca67..b2f290f6c1 100644
--- a/Userland/Libraries/LibWeb/DOM/Node.idl
+++ b/Userland/Libraries/LibWeb/DOM/Node.idl
@@ -27,13 +27,13 @@ interface Node : EventTarget {
     // FIXME: [LegacyNullToEmptyString] is not allowed on nullable types as per the Web IDL spec.
     //        However, we only apply it to setters, so this works as a stop gap.
     //        Replace this with something like a special cased [LegacyNullToEmptyString].
-    [LegacyNullToEmptyString] attribute DOMString? textContent;
+    [LegacyNullToEmptyString, CEReactions] attribute DOMString? textContent;
 
-    Node appendChild(Node node);
-    [ImplementedAs=pre_insert] Node insertBefore(Node node, Node? child);
-    Node replaceChild(Node node, Node child);
-    [ImplementedAs=pre_remove] Node removeChild(Node child);
-    [ImplementedAs=clone_node_binding] Node cloneNode(optional boolean deep = false);
+    [CEReactions] Node appendChild(Node node);
+    [ImplementedAs=pre_insert, CEReactions] Node insertBefore(Node node, Node? child);
+    [CEReactions] Node replaceChild(Node node, Node child);
+    [ImplementedAs=pre_remove, CEReactions] Node removeChild(Node child);
+    [ImplementedAs=clone_node_binding, CEReactions] Node cloneNode(optional boolean deep = false);
     boolean contains(Node? other);
     boolean isEqualNode(Node? otherNode);
     boolean isSameNode(Node? otherNode);
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLAreaElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLAreaElement.idl
index 0e15a6f89f..df8a755d77 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLAreaElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLAreaElement.idl
@@ -7,15 +7,13 @@ interface HTMLAreaElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    // FIXME: [CEReactions] attribute DOMString alt;
-    // FIXME: [CEReactions] attribute DOMString coords;
-    // FIXME: [CEReactions] attribute DOMString shape;
-    // FIXME: [CEReactions] attribute DOMString target;
-    // FIXME: [CEReactions] attribute DOMString download;
-    // FIXME: [CEReactions] attribute USVString ping;
-    // FIXME: [CEReactions] attribute DOMString rel;
-    // FIXME: [SameObject, PutForwards=value] readonly attribute DOMTokenList relList;
-    // FIXME: [CEReactions] attribute DOMString referrerPolicy;
+    [CEReactions, Reflect] attribute DOMString alt;
+    [CEReactions, Reflect] attribute DOMString coords;
+    [CEReactions, Reflect] attribute DOMString shape;
+    [CEReactions, Reflect] attribute DOMString target;
+    [CEReactions, Reflect] attribute DOMString download;
+    [CEReactions, Reflect] attribute USVString ping;
+    [CEReactions, Reflect] attribute DOMString rel;
 
     // Obsolete
     [Reflect=nohref] attribute boolean noHref;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLBRElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLBRElement.idl
index c8b6e7f19e..f4b1a5bee4 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLBRElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLBRElement.idl
@@ -6,6 +6,6 @@ interface HTMLBRElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString clear;
+    [CEReactions, Reflect] attribute DOMString clear;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLBaseElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLBaseElement.idl
index 6870bd24ba..fe82387616 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLBaseElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLBaseElement.idl
@@ -7,6 +7,6 @@ interface HTMLBaseElement : HTMLElement {
     [HTMLConstructor] constructor();
 
     [CEReactions] attribute USVString href;
-    [Reflect] attribute DOMString target;
+    [CEReactions, Reflect] attribute DOMString target;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLBodyElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLBodyElement.idl
index fbca003228..47ae014d18 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLBodyElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLBodyElement.idl
@@ -7,12 +7,12 @@ interface HTMLBodyElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [LegacyNullToEmptyString, Reflect] attribute DOMString text;
-    [LegacyNullToEmptyString, Reflect] attribute DOMString link;
-    [LegacyNullToEmptyString, Reflect=vlink] attribute DOMString vLink;
-    [LegacyNullToEmptyString, Reflect=alink] attribute DOMString aLink;
-    [LegacyNullToEmptyString, Reflect=bgcolor] attribute DOMString bgColor;
-    [Reflect] attribute DOMString background;
+    [CEReactions, LegacyNullToEmptyString, Reflect] attribute DOMString text;
+    [CEReactions, LegacyNullToEmptyString, Reflect] attribute DOMString link;
+    [CEReactions, LegacyNullToEmptyString, Reflect=vlink] attribute DOMString vLink;
+    [CEReactions, LegacyNullToEmptyString, Reflect=alink] attribute DOMString aLink;
+    [CEReactions, LegacyNullToEmptyString, Reflect=bgcolor] attribute DOMString bgColor;
+    [CEReactions, Reflect] attribute DOMString background;
 
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLButtonElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLButtonElement.idl
index 996b0a6295..a9fe14791c 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLButtonElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLButtonElement.idl
@@ -6,10 +6,10 @@ interface HTMLButtonElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect=formnovalidate] attribute boolean formNoValidate;
-    [Reflect=formtarget] attribute DOMString formTarget;
-    [Reflect] attribute DOMString name;
-    [Reflect] attribute DOMString value;
+    [CEReactions, Reflect=formnovalidate] attribute boolean formNoValidate;
+    [CEReactions, Reflect=formtarget] attribute DOMString formTarget;
+    [CEReactions, Reflect] attribute DOMString name;
+    [CEReactions, Reflect] attribute DOMString value;
     [CEReactions] attribute DOMString type;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.idl
index 2731b0aded..90df720626 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.idl
@@ -11,8 +11,8 @@ interface HTMLCanvasElement : HTMLElement {
     [HTMLConstructor] constructor();
 
     RenderingContext? getContext(DOMString contextId, optional any options = null);
-    attribute unsigned long width;
-    attribute unsigned long height;
+    [CEReactions] attribute unsigned long width;
+    [CEReactions] attribute unsigned long height;
 
     USVString toDataURL(optional DOMString type = "image/png", optional double quality);
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDListElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLDListElement.idl
index b50faf2130..3bd2f4b52f 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDListElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDListElement.idl
@@ -6,6 +6,6 @@ interface HTMLDListElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute boolean compact;
+    [CEReactions, Reflect] attribute boolean compact;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDataElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLDataElement.idl
index fd29628575..707351f8c7 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDataElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDataElement.idl
@@ -6,6 +6,6 @@ interface HTMLDataElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString value;
+    [CEReactions, Reflect] attribute DOMString value;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDetailsElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLDetailsElement.idl
index b5f5678f19..8694d0c770 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDetailsElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDetailsElement.idl
@@ -6,6 +6,6 @@ interface HTMLDetailsElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute boolean open;
+    [CEReactions, Reflect] attribute boolean open;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDialogElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLDialogElement.idl
index 2842151af5..98ed8271e4 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDialogElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDialogElement.idl
@@ -6,6 +6,6 @@ interface HTMLDialogElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute boolean open;
+    [CEReactions, Reflect] attribute boolean open;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDirectoryElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLDirectoryElement.idl
index 19681d9dc8..6f789d62c3 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDirectoryElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDirectoryElement.idl
@@ -6,6 +6,6 @@ interface HTMLDirectoryElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute boolean compact;
+    [CEReactions, Reflect] attribute boolean compact;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLDivElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLDivElement.idl
index a925b777e5..69e56031f4 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLDivElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLDivElement.idl
@@ -6,6 +6,6 @@ interface HTMLDivElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString align;
+    [CEReactions, Reflect] attribute DOMString align;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLElement.idl
index 7313dba7b9..52fc46dd64 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLElement.idl
@@ -8,11 +8,11 @@ interface HTMLElement : Element {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString title;
-    [Reflect] attribute DOMString lang;
-    attribute DOMString dir;
+    [Reflect, CEReactions] attribute DOMString title;
+    [Reflect, CEReactions] attribute DOMString lang;
+    [CEReactions] attribute DOMString dir;
 
-    [Reflect] attribute boolean hidden;
+    [Reflect, CEReactions] attribute boolean hidden;
 
     attribute DOMString contentEditable;
 
@@ -23,7 +23,7 @@ interface HTMLElement : Element {
 
     undefined blur();
 
-    [LegacyNullToEmptyString] attribute DOMString innerText;
+    [LegacyNullToEmptyString, CEReactions] attribute DOMString innerText;
 
     readonly attribute long offsetTop;
     readonly attribute long offsetLeft;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLEmbedElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLEmbedElement.idl
index eb75d3f6f2..2cf3c34c1b 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLEmbedElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLEmbedElement.idl
@@ -6,12 +6,12 @@ interface HTMLEmbedElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString src;
-    [Reflect] attribute DOMString type;
-    [Reflect] attribute DOMString width;
-    [Reflect] attribute DOMString height;
+    [CEReactions, Reflect] attribute DOMString src;
+    [CEReactions, Reflect] attribute DOMString type;
+    [CEReactions, Reflect] attribute DOMString width;
+    [CEReactions, Reflect] attribute DOMString height;
 
-    [Reflect] attribute DOMString align;
-    [Reflect] attribute DOMString name;
+    [CEReactions, Reflect] attribute DOMString align;
+    [CEReactions, Reflect] attribute DOMString name;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFontElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLFontElement.idl
index e992ab5b9b..9121dd32b3 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFontElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFontElement.idl
@@ -6,8 +6,8 @@ interface HTMLFontElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [LegacyNullToEmptyString, Reflect] attribute DOMString color;
-    [Reflect] attribute DOMString face;
-    [Reflect] attribute DOMString size;
+    [CEReactions, LegacyNullToEmptyString, Reflect] attribute DOMString color;
+    [CEReactions, Reflect] attribute DOMString face;
+    [CEReactions, Reflect] attribute DOMString size;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFormElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLFormElement.idl
index 4ec5d541c6..dfa23db79d 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFormElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFormElement.idl
@@ -7,10 +7,10 @@ interface HTMLFormElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString name;
-    [Reflect] attribute DOMString rel;
-    [Reflect=accept-charset] attribute DOMString acceptCharset;
-    [Reflect=novalidate] attribute boolean noValidate;
+    [CEReactions, Reflect] attribute DOMString name;
+    [CEReactions, Reflect] attribute DOMString rel;
+    [CEReactions, Reflect=accept-charset] attribute DOMString acceptCharset;
+    [CEReactions, Reflect=novalidate] attribute boolean noValidate;
 
     undefined submit();
     [CEReactions] undefined reset();
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFrameElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLFrameElement.idl
index 7e0a900fc1..89c4e229c5 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFrameElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFrameElement.idl
@@ -6,10 +6,10 @@ interface HTMLFrameElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString name;
-    [Reflect] attribute DOMString scrolling;
-    [Reflect] attribute DOMString src;
-    [Reflect=frameborder] attribute DOMString frameBorder;
-    [Reflect=longdesc] attribute DOMString longDesc;
+    [CEReactions, Reflect] attribute DOMString name;
+    [CEReactions, Reflect] attribute DOMString scrolling;
+    [CEReactions, Reflect] attribute DOMString src;
+    [CEReactions, Reflect=frameborder] attribute DOMString frameBorder;
+    [CEReactions, Reflect=longdesc] attribute DOMString longDesc;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLFrameSetElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLFrameSetElement.idl
index e35f86a546..9e984482af 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLFrameSetElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLFrameSetElement.idl
@@ -7,8 +7,8 @@ interface HTMLFrameSetElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString cols;
-    [Reflect] attribute DOMString rows;
+    [CEReactions, Reflect] attribute DOMString cols;
+    [CEReactions, Reflect] attribute DOMString rows;
 
 };
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLHRElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLHRElement.idl
index c08dc495d4..172e7a31a4 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLHRElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLHRElement.idl
@@ -6,10 +6,10 @@ interface HTMLHRElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString align;
-    [Reflect] attribute DOMString color;
-    [Reflect=noshade] attribute boolean noShade;
-    [Reflect] attribute DOMString size;
-    [Reflect] attribute DOMString width;
+    [CEReactions, Reflect] attribute DOMString align;
+    [CEReactions, Reflect] attribute DOMString color;
+    [CEReactions, Reflect=noshade] attribute boolean noShade;
+    [CEReactions, Reflect] attribute DOMString size;
+    [CEReactions, Reflect] attribute DOMString width;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLHeadingElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLHeadingElement.idl
index bdac8c4391..d1df2dcca2 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLHeadingElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLHeadingElement.idl
@@ -6,6 +6,6 @@ interface HTMLHeadingElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString align;
+    [CEReactions, Reflect] attribute DOMString align;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.idl
index 37ecc58e7d..8c27c495ae 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.idl
@@ -6,6 +6,6 @@ interface HTMLHtmlElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString version;
+    [CEReactions, Reflect] attribute DOMString version;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.idl
index 1e6e0cd554..bff188e026 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.idl
@@ -7,24 +7,24 @@ interface HTMLIFrameElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString src;
-    [Reflect] attribute DOMString srcdoc;
-    [Reflect] attribute DOMString name;
-    [Reflect] attribute DOMString allow;
-    [Reflect] attribute DOMString width;
-    [Reflect] attribute DOMString height;
-    [Reflect=allowfullscreen] attribute boolean allowFullscreen;
+    [CEReactions, Reflect] attribute DOMString src;
+    [CEReactions, Reflect] attribute DOMString srcdoc;
+    [CEReactions, Reflect] attribute DOMString name;
+    [CEReactions, Reflect] attribute DOMString allow;
+    [CEReactions, Reflect] attribute DOMString width;
+    [CEReactions, Reflect] attribute DOMString height;
+    [CEReactions, Reflect=allowfullscreen] attribute boolean allowFullscreen;
 
     readonly attribute Document? contentDocument;
 
     readonly attribute WindowProxy? contentWindow;
 
-    [Reflect] attribute DOMString align;
-    [Reflect] attribute DOMString scrolling;
-    [Reflect=frameborder] attribute DOMString frameBorder;
+    [CEReactions, Reflect] attribute DOMString align;
+    [CEReactions, Reflect] attribute DOMString scrolling;
+    [CEReactions, Reflect=frameborder] attribute DOMString frameBorder;
 
-    [LegacyNullToEmptyString, Reflect=marginheight] attribute DOMString marginHeight;
-    [LegacyNullToEmptyString, Reflect=marginwidth] attribute DOMString marginWidth;
+    [CEReactions, LegacyNullToEmptyString, Reflect=marginheight] attribute DOMString marginHeight;
+    [CEReactions, LegacyNullToEmptyString, Reflect=marginwidth] attribute DOMString marginWidth;
 
     Document? getSVGDocument();
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLImageElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLImageElement.idl
index 3cb36a8493..4304041b62 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLImageElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLImageElement.idl
@@ -6,16 +6,16 @@ interface HTMLImageElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString src;
-    [Reflect] attribute DOMString alt;
-    [Reflect] attribute DOMString srcset;
-    [Reflect] attribute DOMString sizes;
-    [Reflect=usemap] attribute DOMString useMap;
-    [Reflect=ismap] attribute boolean isMap;
+    [CEReactions, Reflect] attribute DOMString src;
+    [CEReactions, Reflect] attribute DOMString alt;
+    [CEReactions, Reflect] attribute DOMString srcset;
+    [CEReactions, Reflect] attribute DOMString sizes;
+    [CEReactions, Reflect=usemap] attribute DOMString useMap;
+    [CEReactions, Reflect=ismap] attribute boolean isMap;
 
-    [Reflect] attribute DOMString name;
-    [Reflect] attribute DOMString align;
-    [LegacyNullToEmptyString, Reflect] attribute DOMString border;
+    [CEReactions, Reflect] attribute DOMString name;
+    [CEReactions, Reflect] attribute DOMString align;
+    [CEReactions, LegacyNullToEmptyString, Reflect] attribute DOMString border;
 
     [CEReactions] attribute unsigned long width;
     [CEReactions] attribute unsigned long height;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLInputElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLInputElement.idl
index 328037046d..767ba66aa4 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLInputElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLInputElement.idl
@@ -11,35 +11,35 @@ interface HTMLInputElement : HTMLElement {
     readonly attribute HTMLFormElement? form;
     attribute FileList? files;
 
-    [Reflect] attribute DOMString accept;
-    [Reflect] attribute DOMString alt;
-    [Reflect] attribute DOMString max;
-    [Reflect] attribute DOMString min;
-    [Reflect] attribute DOMString pattern;
-    [Reflect] attribute DOMString placeholder;
-    [Reflect] attribute DOMString src;
-    [Reflect] attribute DOMString step;
-    [Reflect] attribute DOMString name;
-    [Reflect=dirname] attribute DOMString dirName;
-    [Reflect=value] attribute DOMString defaultValue;
-
-    attribute DOMString type;
+    [CEReactions, Reflect] attribute DOMString accept;
+    [CEReactions, Reflect] attribute DOMString alt;
+    [CEReactions, Reflect] attribute DOMString max;
+    [CEReactions, Reflect] attribute DOMString min;
+    [CEReactions, Reflect] attribute DOMString pattern;
+    [CEReactions, Reflect] attribute DOMString placeholder;
+    [CEReactions, Reflect] attribute DOMString src;
+    [CEReactions, Reflect] attribute DOMString step;
+    [CEReactions, Reflect] attribute DOMString name;
+    [CEReactions, Reflect=dirname] attribute DOMString dirName;
+    [CEReactions, Reflect=value] attribute DOMString defaultValue;
+
+    [CEReactions] attribute DOMString type;
     attribute boolean indeterminate;
 
-    [LegacyNullToEmptyString] attribute DOMString value;
+    [CEReactions, LegacyNullToEmptyString] attribute DOMString value;
 
     [ImplementedAs=checked_binding] attribute boolean checked;
 
-    [Reflect] attribute boolean disabled;
-    [Reflect=checked] attribute boolean defaultChecked;
-    [Reflect=formnovalidate] attribute boolean formNoValidate;
-    [Reflect=formtarget] attribute DOMString formTarget;
-    [Reflect] attribute boolean multiple;
-    [Reflect=readonly] attribute boolean readOnly;
-    [Reflect] attribute boolean required;
+    [CEReactions, Reflect] attribute boolean disabled;
+    [CEReactions, Reflect=checked] attribute boolean defaultChecked;
+    [CEReactions, Reflect=formnovalidate] attribute boolean formNoValidate;
+    [CEReactions, Reflect=formtarget] attribute DOMString formTarget;
+    [CEReactions, Reflect] attribute boolean multiple;
+    [CEReactions, Reflect=readonly] attribute boolean readOnly;
+    [CEReactions, Reflect] attribute boolean required;
 
-    [Reflect] attribute DOMString align;
-    [Reflect=usemap] attribute DOMString useMap;
+    [CEReactions, Reflect] attribute DOMString align;
+    [CEReactions, Reflect=usemap] attribute DOMString useMap;
 
     boolean checkValidity();
     boolean reportValidity();
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLLIElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLLIElement.idl
index 6b4490f05d..791e297972 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLLIElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLLIElement.idl
@@ -5,7 +5,8 @@
 interface HTMLLIElement : HTMLElement {
 
     [HTMLConstructor] constructor();
+    // FIXME: [CEReactions] attribute long value;
 
-    [Reflect] attribute DOMString type;
+    [CEReactions, Reflect] attribute DOMString type;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLLabelElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLLabelElement.idl
index 0e4387355c..002ecee32c 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLLabelElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLLabelElement.idl
@@ -6,6 +6,6 @@ interface HTMLLabelElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect=for] attribute DOMString htmlFor;
+    [CEReactions, Reflect=for] attribute DOMString htmlFor;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLLegendElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLLegendElement.idl
index 4fdc50d292..506853c9d9 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLLegendElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLLegendElement.idl
@@ -6,6 +6,6 @@ interface HTMLLegendElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString align;
+    [CEReactions, Reflect] attribute DOMString align;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLLinkElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLLinkElement.idl
index 2c75f2f958..f503297d1d 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLLinkElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLLinkElement.idl
@@ -6,18 +6,18 @@ interface HTMLLinkElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString href;
-    [Reflect] attribute DOMString hreflang;
-    [Reflect] attribute DOMString integrity;
-    [Reflect] attribute DOMString media;
-    [Reflect] attribute DOMString rel;
-    [Reflect] attribute DOMString type;
-    [Reflect=imagesrcset] attribute DOMString imageSrcset;
-    [Reflect=imagesizes] attribute DOMString imageSizes;
-    [Reflect] attribute boolean disabled;
+    [CEReactions, Reflect] attribute DOMString href;
+    [CEReactions, Reflect] attribute DOMString hreflang;
+    [CEReactions, Reflect] attribute DOMString integrity;
+    [CEReactions, Reflect] attribute DOMString media;
+    [CEReactions, Reflect] attribute DOMString rel;
+    [CEReactions, Reflect] attribute DOMString type;
+    [CEReactions, Reflect=imagesrcset] attribute DOMString imageSrcset;
+    [CEReactions, Reflect=imagesizes] attribute DOMString imageSizes;
+    [CEReactions, Reflect] attribute boolean disabled;
 
-    [Reflect] attribute DOMString charset;
-    [Reflect] attribute DOMString rev;
-    [Reflect] attribute DOMString target;
+    [CEReactions, Reflect] attribute DOMString charset;
+    [CEReactions, Reflect] attribute DOMString rev;
+    [CEReactions, Reflect] attribute DOMString target;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMapElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLMapElement.idl
index 516c58c225..79da6e07ee 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMapElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMapElement.idl
@@ -6,6 +6,6 @@ interface HTMLMapElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString name;
+    [CEReactions, Reflect] attribute DOMString name;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMarqueeElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLMarqueeElement.idl
index da94944b6c..b9fd06c474 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMarqueeElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMarqueeElement.idl
@@ -6,10 +6,10 @@ interface HTMLMarqueeElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString behavior;
-    [Reflect=bgcolor] attribute DOMString bgColor;
-    [Reflect] attribute DOMString direction;
-    [Reflect] attribute DOMString height;
-    [Reflect] attribute DOMString width;
+    [CEReactions, Reflect] attribute DOMString behavior;
+    [CEReactions, Reflect=bgcolor] attribute DOMString bgColor;
+    [CEReactions, Reflect] attribute DOMString direction;
+    [CEReactions, Reflect] attribute DOMString height;
+    [CEReactions, Reflect] attribute DOMString width;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMediaElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLMediaElement.idl
index c611d567eb..a27c4912de 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMediaElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMediaElement.idl
@@ -10,12 +10,12 @@ enum CanPlayTypeResult {
 [Exposed=Window]
 interface HTMLMediaElement : HTMLElement {
 
-    [Reflect] attribute DOMString src;
+    [Reflect, CEReactions] attribute DOMString src;
 
-    [Reflect] attribute boolean autoplay;
-    [Reflect] attribute boolean loop;
+    [Reflect, CEReactions] attribute boolean autoplay;
+    [Reflect, CEReactions] attribute boolean loop;
 
-    [Reflect] attribute boolean controls;
+    [Reflect, CEReactions] attribute boolean controls;
 
     CanPlayTypeResult canPlayType(DOMString type);
     undefined load();
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMenuElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLMenuElement.idl
index 82ecd13687..82fb9df483 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMenuElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMenuElement.idl
@@ -6,6 +6,6 @@ interface HTMLMenuElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute boolean compact;
+    [CEReactions, Reflect] attribute boolean compact;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLMetaElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLMetaElement.idl
index fb16a51468..35bffbd246 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLMetaElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLMetaElement.idl
@@ -6,10 +6,10 @@ interface HTMLMetaElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString name;
-    [Reflect] attribute DOMString content;
-    [Reflect=http-equiv] attribute DOMString httpEquiv;
+    [CEReactions, Reflect] attribute DOMString name;
+    [CEReactions, Reflect] attribute DOMString content;
+    [CEReactions, Reflect=http-equiv] attribute DOMString httpEquiv;
 
-    [Reflect] attribute DOMString scheme;
+    [CEReactions, Reflect] attribute DOMString scheme;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLModElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLModElement.idl
index 8c2ed2a87f..b3312f432b 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLModElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLModElement.idl
@@ -6,7 +6,7 @@ interface HTMLModElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute USVString cite;
-    [Reflect=datetime] attribute DOMString dateTime;
+    [CEReactions, Reflect] attribute USVString cite;
+    [CEReactions, Reflect=datetime] attribute DOMString dateTime;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLOListElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLOListElement.idl
index da4fbf2d28..61f70ae431 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLOListElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLOListElement.idl
@@ -6,9 +6,10 @@ interface HTMLOListElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute boolean reversed;
-    [Reflect] attribute DOMString type;
+    [CEReactions, Reflect] attribute boolean reversed;
+    // FIXME: [CEReactions] attribute long start;
+    [CEReactions, Reflect] attribute DOMString type;
 
-    [Reflect] attribute boolean compact;
+    [CEReactions, Reflect] attribute boolean compact;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLObjectElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLObjectElement.idl
index fe2ef6bc91..1e40ca5329 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLObjectElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLObjectElement.idl
@@ -8,22 +8,22 @@ interface HTMLObjectElement : HTMLElement {
     [HTMLConstructor] constructor();
 
     [CEReactions] attribute DOMString data;
-    [Reflect] attribute DOMString type;
-    [Reflect] attribute DOMString name;
-    [Reflect=usemap] attribute DOMString useMap;
-    [Reflect] attribute DOMString width;
-    [Reflect] attribute DOMString height;
+    [CEReactions, Reflect] attribute DOMString type;
+    [CEReactions, Reflect] attribute DOMString name;
+    [CEReactions, Reflect=usemap] attribute DOMString useMap;
+    [CEReactions, Reflect] attribute DOMString width;
+    [CEReactions, Reflect] attribute DOMString height;
 
     readonly attribute Document? contentDocument;
 
-    [Reflect] attribute DOMString align;
-    [Reflect] attribute DOMString archive;
-    [Reflect] attribute DOMString code;
-    [Reflect] attribute boolean declare;
-    [Reflect] attribute DOMString standby;
-    [Reflect=codetype] attribute DOMString codeType;
+    [CEReactions, Reflect] attribute DOMString align;
+    [CEReactions, Reflect] attribute DOMString archive;
+    [CEReactions, Reflect] attribute DOMString code;
+    [CEReactions, Reflect] attribute boolean declare;
+    [CEReactions, Reflect] attribute DOMString standby;
+    [CEReactions, Reflect=codetype] attribute DOMString codeType;
 
-    [LegacyNullToEmptyString, Reflect] attribute DOMString border;
+    [CEReactions, LegacyNullToEmptyString, Reflect] attribute DOMString border;
 
     Document? getSVGDocument();
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLOptGroupElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLOptGroupElement.idl
index f810206d77..04b5872904 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLOptGroupElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLOptGroupElement.idl
@@ -6,7 +6,7 @@ interface HTMLOptGroupElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute boolean disabled;
-    [Reflect] attribute DOMString label;
+    [CEReactions, Reflect] attribute boolean disabled;
+    [CEReactions, Reflect] attribute DOMString label;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.idl
index 9ff5ac2812..b1807007ac 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLOptionElement.idl
@@ -6,8 +6,8 @@ interface HTMLOptionElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute boolean disabled;
-    [Reflect=selected] attribute boolean defaultSelected;
+    [CEReactions, Reflect] attribute boolean disabled;
+    [CEReactions, Reflect=selected] attribute boolean defaultSelected;
     attribute boolean selected;
     [CEReactions] attribute DOMString value;
 
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLParagraphElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLParagraphElement.idl
index 80651af3fe..0ca919f2e9 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLParagraphElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLParagraphElement.idl
@@ -6,6 +6,6 @@ interface HTMLParagraphElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString align;
+    [CEReactions, Reflect] attribute DOMString align;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLParamElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLParamElement.idl
index 732845617a..3623c58f08 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLParamElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLParamElement.idl
@@ -6,10 +6,10 @@ interface HTMLParamElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString name;
-    [Reflect] attribute DOMString value;
+    [CEReactions, Reflect] attribute DOMString name;
+    [CEReactions, Reflect] attribute DOMString value;
 
-    [Reflect] attribute DOMString type;
-    [Reflect=valuetype] attribute DOMString valueType;
+    [CEReactions, Reflect] attribute DOMString type;
+    [CEReactions, Reflect=valuetype] attribute DOMString valueType;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLPreElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLPreElement.idl
index 745dfd0c81..6fa4e64e36 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLPreElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLPreElement.idl
@@ -5,5 +5,6 @@
 interface HTMLPreElement : HTMLElement {
 
     [HTMLConstructor] constructor();
+    // FIXME: [CEReactions, Reflect] attribute long width;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLQuoteElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLQuoteElement.idl
index 8b1957cf63..623f73d3cd 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLQuoteElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLQuoteElement.idl
@@ -6,6 +6,6 @@ interface HTMLQuoteElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString cite;
+    [CEReactions, Reflect] attribute USVString cite;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.idl
index 3a7807d7ed..8b6c73ae89 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLScriptElement.idl
@@ -6,16 +6,16 @@ interface HTMLScriptElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString src;
-    [Reflect] attribute DOMString type;
-    [Reflect=nomodule] attribute boolean noModule;
-    [Reflect] attribute boolean defer;
-    [Reflect] attribute DOMString integrity;
+    [CEReactions, Reflect] attribute DOMString src;
+    [CEReactions, Reflect] attribute DOMString type;
+    [CEReactions, Reflect=nomodule] attribute boolean noModule;
+    [CEReactions, Reflect] attribute boolean defer;
+    [CEReactions, Reflect] attribute DOMString integrity;
 
     static boolean supports(DOMString type);
 
-    [Reflect] attribute DOMString charset;
-    [Reflect] attribute DOMString event;
-    [Reflect=for] attribute DOMString htmlFor;
+    [CEReactions, Reflect] attribute DOMString charset;
+    [CEReactions, Reflect] attribute DOMString event;
+    [CEReactions, Reflect=for] attribute DOMString htmlFor;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLSelectElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLSelectElement.idl
index 6afbd9f7df..d57ca829c1 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLSelectElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLSelectElement.idl
@@ -7,9 +7,9 @@ interface HTMLSelectElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute boolean disabled;
-    [Reflect] attribute boolean multiple;
-    [Reflect] attribute boolean required;
+    [CEReactions, Reflect] attribute boolean disabled;
+    [CEReactions, Reflect] attribute boolean multiple;
+    [CEReactions, Reflect] attribute boolean required;
     [SameObject] readonly attribute HTMLOptionsCollection options;
 
     readonly attribute DOMString type;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLSlotElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLSlotElement.idl
index d12bd92528..64cb999bd8 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLSlotElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLSlotElement.idl
@@ -6,6 +6,6 @@ interface HTMLSlotElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString name;
+    [CEReactions, Reflect] attribute DOMString name;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLSourceElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLSourceElement.idl
index 55f6235d47..49aeb6d57a 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLSourceElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLSourceElement.idl
@@ -6,10 +6,12 @@ interface HTMLSourceElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString src;
-    [Reflect] attribute DOMString type;
-    [Reflect] attribute DOMString srcset;
-    [Reflect] attribute DOMString sizes;
-    [Reflect] attribute DOMString media;
+    [CEReactions, Reflect] attribute DOMString src;
+    [CEReactions, Reflect] attribute DOMString type;
+    [CEReactions, Reflect] attribute DOMString srcset;
+    [CEReactions, Reflect] attribute DOMString sizes;
+    [CEReactions, Reflect] attribute DOMString media;
+    // FIXME: [CEReactions, Reflect] attribute unsigned long width;
+    // FIXME: [CEReactions, Reflect] attribute unsigned long height;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLStyleElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLStyleElement.idl
index f9a306be7c..600459b4dd 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLStyleElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLStyleElement.idl
@@ -8,7 +8,7 @@ interface HTMLStyleElement : HTMLElement {
     [HTMLConstructor] constructor();
 
     // FIXME: attribute boolean disabled;
-    [Reflect] attribute DOMString media;
+    [Reflect, CEReactions] attribute DOMString media;
     // FIXME: [SameObject, PutForwards=value] readonly attribute DOMTokenList blocking;
 
     // Obsolete
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableCaptionElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLTableCaptionElement.idl
index e572bf0c6a..b0413d9dae 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableCaptionElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableCaptionElement.idl
@@ -6,6 +6,6 @@ interface HTMLTableCaptionElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString align;
+    [CEReactions, Reflect] attribute DOMString align;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableCellElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLTableCellElement.idl
index 32c1bc8e0c..d9fddd3bbb 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableCellElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableCellElement.idl
@@ -6,21 +6,21 @@ interface HTMLTableCellElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    attribute unsigned long colSpan;
-    attribute unsigned long rowSpan;
-    [Reflect] attribute DOMString headers;
-    [Reflect] attribute DOMString abbr;
+    [CEReactions] attribute unsigned long colSpan;
+    [CEReactions] attribute unsigned long rowSpan;
+    [CEReactions, Reflect] attribute DOMString headers;
+    [CEReactions, Reflect] attribute DOMString abbr;
 
-    [Reflect] attribute DOMString align;
-    [Reflect] attribute DOMString axis;
-    [Reflect] attribute DOMString height;
-    [Reflect] attribute DOMString width;
+    [CEReactions, Reflect] attribute DOMString align;
+    [CEReactions, Reflect] attribute DOMString axis;
+    [CEReactions, Reflect] attribute DOMString height;
+    [CEReactions, Reflect] attribute DOMString width;
 
-    [Reflect=char] attribute DOMString ch;
-    [Reflect=charoff] attribute DOMString chOff;
-    [Reflect=nowrap] attribute boolean noWrap;
-    [Reflect=valign] attribute DOMString vAlign;
+    [CEReactions, Reflect=char] attribute DOMString ch;
+    [CEReactions, Reflect=charoff] attribute DOMString chOff;
+    [CEReactions, Reflect=nowrap] attribute boolean noWrap;
+    [CEReactions, Reflect=valign] attribute DOMString vAlign;
 
-    [LegacyNullToEmptyString, Reflect=bgcolor] attribute DOMString bgColor;
+    [CEReactions, LegacyNullToEmptyString, Reflect=bgcolor] attribute DOMString bgColor;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableColElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLTableColElement.idl
index ab5fb93f30..b84f50403b 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableColElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableColElement.idl
@@ -6,10 +6,10 @@ interface HTMLTableColElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString align;
-    [Reflect=char] attribute DOMString ch;
-    [Reflect=charoff] attribute DOMString chOff;
-    [Reflect=valign] attribute DOMString vAlign;
-    [Reflect] attribute DOMString width;
+    [CEReactions, Reflect] attribute DOMString align;
+    [CEReactions, Reflect=char] attribute DOMString ch;
+    [CEReactions, Reflect=charoff] attribute DOMString chOff;
+    [CEReactions, Reflect=valign] attribute DOMString vAlign;
+    [CEReactions, Reflect] attribute DOMString width;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLTableElement.idl
index 7e7195c407..d6a2b1c8e1 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableElement.idl
@@ -10,34 +10,34 @@ interface HTMLTableElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    attribute HTMLTableCaptionElement? caption;
+    [CEReactions] attribute HTMLTableCaptionElement? caption;
     HTMLTableCaptionElement createCaption();
-    undefined deleteCaption();
+    [CEReactions] undefined deleteCaption();
 
-    attribute HTMLTableSectionElement? tHead;
+    [CEReactions] attribute HTMLTableSectionElement? tHead;
     HTMLTableSectionElement createTHead();
-    undefined deleteTHead();
+    [CEReactions] undefined deleteTHead();
 
-    attribute HTMLTableSectionElement? tFoot;
+    [CEReactions] attribute HTMLTableSectionElement? tFoot;
     HTMLTableSectionElement createTFoot();
-    undefined deleteTFoot();
+    [CEReactions] undefined deleteTFoot();
 
     [SameObject] readonly attribute HTMLCollection tBodies;
     HTMLTableSectionElement createTBody();
 
     [SameObject] readonly attribute HTMLCollection rows;
     HTMLTableRowElement insertRow(optional long index = -1);
-    undefined deleteRow(long index);
-
-    [Reflect] attribute DOMString align;
-    [Reflect] attribute DOMString border;
-    [Reflect] attribute DOMString frame;
-    [Reflect] attribute DOMString rules;
-    [Reflect] attribute DOMString summary;
-    [Reflect] attribute DOMString width;
-
-    [LegacyNullToEmptyString, Reflect=bgcolor] attribute DOMString bgColor;
-    [LegacyNullToEmptyString, Reflect=cellpadding] attribute DOMString cellPadding;
-    [LegacyNullToEmptyString, Reflect=cellspacing] attribute DOMString cellSpacing;
+    [CEReactions] undefined deleteRow(long index);
+
+    [CEReactions, Reflect] attribute DOMString align;
+    [CEReactions, Reflect] attribute DOMString border;
+    [CEReactions, Reflect] attribute DOMString frame;
+    [CEReactions, Reflect] attribute DOMString rules;
+    [CEReactions, Reflect] attribute DOMString summary;
+    [CEReactions, Reflect] attribute DOMString width;
+
+    [CEReactions, LegacyNullToEmptyString, Reflect=bgcolor] attribute DOMString bgColor;
+    [CEReactions, LegacyNullToEmptyString, Reflect=cellpadding] attribute DOMString cellPadding;
+    [CEReactions, LegacyNullToEmptyString, Reflect=cellspacing] attribute DOMString cellSpacing;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableRowElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLTableRowElement.idl
index 28289dbbd5..9a35671b75 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableRowElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableRowElement.idl
@@ -8,12 +8,12 @@ interface HTMLTableRowElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString align;
-    [Reflect=char] attribute DOMString ch;
-    [Reflect=charoff] attribute DOMString chOff;
-    [Reflect=valign] attribute DOMString vAlign;
+    [CEReactions, Reflect] attribute DOMString align;
+    [CEReactions, Reflect=char] attribute DOMString ch;
+    [CEReactions, Reflect=charoff] attribute DOMString chOff;
+    [CEReactions, Reflect=valign] attribute DOMString vAlign;
 
-    [LegacyNullToEmptyString, Reflect=bgcolor] attribute DOMString bgColor;
+    [CEReactions, LegacyNullToEmptyString, Reflect=bgcolor] attribute DOMString bgColor;
 
     readonly attribute long rowIndex;
     readonly attribute long sectionRowIndex;
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTableSectionElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLTableSectionElement.idl
index f0416da203..d1ff615f05 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTableSectionElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTableSectionElement.idl
@@ -8,13 +8,13 @@ interface HTMLTableSectionElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString align;
-    [Reflect=char] attribute DOMString ch;
-    [Reflect=charoff] attribute DOMString chOff;
-    [Reflect=valign] attribute DOMString vAlign;
+    [CEReactions, Reflect] attribute DOMString align;
+    [CEReactions, Reflect=char] attribute DOMString ch;
+    [CEReactions, Reflect=charoff] attribute DOMString chOff;
+    [CEReactions, Reflect=valign] attribute DOMString vAlign;
 
     [SameObject] readonly attribute HTMLCollection rows;
     HTMLTableRowElement insertRow(optional long index = -1);
-    undefined deleteRow(long index);
+    [CEReactions] undefined deleteRow(long index);
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.idl
index 2191352b94..2ade76aaca 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTextAreaElement.idl
@@ -6,13 +6,13 @@ interface HTMLTextAreaElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString placeholder;
-    [Reflect] attribute DOMString name;
-    [Reflect] attribute DOMString wrap;
+    [CEReactions, Reflect] attribute DOMString placeholder;
+    [CEReactions, Reflect] attribute DOMString name;
+    [CEReactions, Reflect] attribute DOMString wrap;
     readonly attribute DOMString type;
 
-    [Reflect] attribute boolean disabled;
-    [Reflect=readonly] attribute boolean readOnly;
-    [Reflect] attribute boolean required;
+    [CEReactions, Reflect] attribute boolean disabled;
+    [CEReactions, Reflect=readonly] attribute boolean readOnly;
+    [CEReactions, Reflect] attribute boolean required;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTimeElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLTimeElement.idl
index 2581ada6cf..76da859ad9 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTimeElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTimeElement.idl
@@ -6,6 +6,6 @@ interface HTMLTimeElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect=datetime] attribute DOMString dateTime;
+    [CEReactions, Reflect=datetime] attribute DOMString dateTime;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLTrackElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLTrackElement.idl
index 22feb40ec0..f4ff0df664 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLTrackElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLTrackElement.idl
@@ -6,9 +6,9 @@ interface HTMLTrackElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString src;
-    [Reflect] attribute DOMString srclang;
-    [Reflect] attribute DOMString label;
-    [Reflect] attribute boolean default;
+    [CEReactions, Reflect] attribute DOMString src;
+    [CEReactions, Reflect] attribute DOMString srclang;
+    [CEReactions, Reflect] attribute DOMString label;
+    [CEReactions, Reflect] attribute boolean default;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLUListElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLUListElement.idl
index 47f9d03c22..207ffc08d7 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLUListElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLUListElement.idl
@@ -6,7 +6,7 @@ interface HTMLUListElement : HTMLElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute boolean compact;
-    [Reflect] attribute DOMString type;
+    [CEReactions, Reflect] attribute boolean compact;
+    [CEReactions, Reflect] attribute DOMString type;
 
 };
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.idl b/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.idl
index b5020bc978..57fc11bd69 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.idl
+++ b/Userland/Libraries/LibWeb/HTML/HTMLVideoElement.idl
@@ -6,7 +6,7 @@ interface HTMLVideoElement : HTMLMediaElement {
 
     [HTMLConstructor] constructor();
 
-    [Reflect] attribute DOMString poster;
-    [Reflect=playsinline] attribute boolean playsInline;
+    [CEReactions, Reflect] attribute USVString poster;
+    [CEReactions, Reflect=playsinline] attribute boolean playsInline;
 
 };