diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index 0af706106..c96bb81bd 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -2618,8 +2618,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
@@ -7639,6 +7639,12 @@ interface CSSStyleProperties extends CSSStyleDeclarationBase {
      * [MDN Reference](https://developer.mozilla.org/docs/Web/CSS/Reference/Properties/math-depth)
      */
     mathDepth: string;
+    /**
+     * The math-shift property indicates whether superscripts inside MathML formulas should be raised by a normal or compact shift.
+     *
+     * [MDN Reference](https://developer.mozilla.org/docs/Web/CSS/Reference/Properties/math-shift)
+     */
+    mathShift: string;
     /**
      * The math-style property indicates whether MathML equations should render with normal or compact height.
      *
diff --git a/baselines/serviceworker.generated.d.ts b/baselines/serviceworker.generated.d.ts
index aae479c24..f68459b86 100644
--- a/baselines/serviceworker.generated.d.ts
+++ b/baselines/serviceworker.generated.d.ts
@@ -850,8 +850,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
diff --git a/baselines/sharedworker.generated.d.ts b/baselines/sharedworker.generated.d.ts
index 4cf5a4f58..d6288c939 100644
--- a/baselines/sharedworker.generated.d.ts
+++ b/baselines/sharedworker.generated.d.ts
@@ -780,8 +780,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
diff --git a/baselines/ts5.5/dom.generated.d.ts b/baselines/ts5.5/dom.generated.d.ts
index 7df5c8b9a..fc1d93ece 100644
--- a/baselines/ts5.5/dom.generated.d.ts
+++ b/baselines/ts5.5/dom.generated.d.ts
@@ -2615,8 +2615,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
@@ -7629,6 +7629,12 @@ interface CSSStyleProperties extends CSSStyleDeclarationBase {
      * [MDN Reference](https://developer.mozilla.org/docs/Web/CSS/Reference/Properties/math-depth)
      */
     mathDepth: string;
+    /**
+     * The math-shift property indicates whether superscripts inside MathML formulas should be raised by a normal or compact shift.
+     *
+     * [MDN Reference](https://developer.mozilla.org/docs/Web/CSS/Reference/Properties/math-shift)
+     */
+    mathShift: string;
     /**
      * The math-style property indicates whether MathML equations should render with normal or compact height.
      *
diff --git a/baselines/ts5.5/serviceworker.generated.d.ts b/baselines/ts5.5/serviceworker.generated.d.ts
index 410808c7a..8b6461eef 100644
--- a/baselines/ts5.5/serviceworker.generated.d.ts
+++ b/baselines/ts5.5/serviceworker.generated.d.ts
@@ -847,8 +847,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
diff --git a/baselines/ts5.5/sharedworker.generated.d.ts b/baselines/ts5.5/sharedworker.generated.d.ts
index 75bae5dcb..235226399 100644
--- a/baselines/ts5.5/sharedworker.generated.d.ts
+++ b/baselines/ts5.5/sharedworker.generated.d.ts
@@ -777,8 +777,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
diff --git a/baselines/ts5.5/webworker.generated.d.ts b/baselines/ts5.5/webworker.generated.d.ts
index 4dbbcc517..638c8bfa6 100644
--- a/baselines/ts5.5/webworker.generated.d.ts
+++ b/baselines/ts5.5/webworker.generated.d.ts
@@ -1085,8 +1085,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
diff --git a/baselines/ts5.6/dom.generated.d.ts b/baselines/ts5.6/dom.generated.d.ts
index 2b176987c..743813310 100644
--- a/baselines/ts5.6/dom.generated.d.ts
+++ b/baselines/ts5.6/dom.generated.d.ts
@@ -2615,8 +2615,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
@@ -7636,6 +7636,12 @@ interface CSSStyleProperties extends CSSStyleDeclarationBase {
      * [MDN Reference](https://developer.mozilla.org/docs/Web/CSS/Reference/Properties/math-depth)
      */
     mathDepth: string;
+    /**
+     * The math-shift property indicates whether superscripts inside MathML formulas should be raised by a normal or compact shift.
+     *
+     * [MDN Reference](https://developer.mozilla.org/docs/Web/CSS/Reference/Properties/math-shift)
+     */
+    mathShift: string;
     /**
      * The math-style property indicates whether MathML equations should render with normal or compact height.
      *
diff --git a/baselines/ts5.6/serviceworker.generated.d.ts b/baselines/ts5.6/serviceworker.generated.d.ts
index 410808c7a..8b6461eef 100644
--- a/baselines/ts5.6/serviceworker.generated.d.ts
+++ b/baselines/ts5.6/serviceworker.generated.d.ts
@@ -847,8 +847,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
diff --git a/baselines/ts5.6/sharedworker.generated.d.ts b/baselines/ts5.6/sharedworker.generated.d.ts
index 75bae5dcb..235226399 100644
--- a/baselines/ts5.6/sharedworker.generated.d.ts
+++ b/baselines/ts5.6/sharedworker.generated.d.ts
@@ -777,8 +777,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
diff --git a/baselines/ts5.6/webworker.generated.d.ts b/baselines/ts5.6/webworker.generated.d.ts
index 4dbbcc517..638c8bfa6 100644
--- a/baselines/ts5.6/webworker.generated.d.ts
+++ b/baselines/ts5.6/webworker.generated.d.ts
@@ -1085,8 +1085,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
diff --git a/baselines/ts5.9/dom.generated.d.ts b/baselines/ts5.9/dom.generated.d.ts
index 39380bf8f..ab262d313 100644
--- a/baselines/ts5.9/dom.generated.d.ts
+++ b/baselines/ts5.9/dom.generated.d.ts
@@ -2615,8 +2615,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
@@ -7636,6 +7636,12 @@ interface CSSStyleProperties extends CSSStyleDeclarationBase {
      * [MDN Reference](https://developer.mozilla.org/docs/Web/CSS/Reference/Properties/math-depth)
      */
     mathDepth: string;
+    /**
+     * The math-shift property indicates whether superscripts inside MathML formulas should be raised by a normal or compact shift.
+     *
+     * [MDN Reference](https://developer.mozilla.org/docs/Web/CSS/Reference/Properties/math-shift)
+     */
+    mathShift: string;
     /**
      * The math-style property indicates whether MathML equations should render with normal or compact height.
      *
diff --git a/baselines/ts5.9/serviceworker.generated.d.ts b/baselines/ts5.9/serviceworker.generated.d.ts
index 8aac878f0..7304f8fb8 100644
--- a/baselines/ts5.9/serviceworker.generated.d.ts
+++ b/baselines/ts5.9/serviceworker.generated.d.ts
@@ -847,8 +847,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
diff --git a/baselines/ts5.9/sharedworker.generated.d.ts b/baselines/ts5.9/sharedworker.generated.d.ts
index de85a33aa..431be223d 100644
--- a/baselines/ts5.9/sharedworker.generated.d.ts
+++ b/baselines/ts5.9/sharedworker.generated.d.ts
@@ -777,8 +777,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
diff --git a/baselines/ts5.9/webworker.generated.d.ts b/baselines/ts5.9/webworker.generated.d.ts
index f8c11ab7a..c1e1a5cf0 100644
--- a/baselines/ts5.9/webworker.generated.d.ts
+++ b/baselines/ts5.9/webworker.generated.d.ts
@@ -1085,8 +1085,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
diff --git a/baselines/webworker.generated.d.ts b/baselines/webworker.generated.d.ts
index 63b329191..a76678cae 100644
--- a/baselines/webworker.generated.d.ts
+++ b/baselines/webworker.generated.d.ts
@@ -1088,8 +1088,8 @@ interface WebTransportErrorOptions {
 }
 
 interface WebTransportHash {
-    algorithm?: string;
-    value?: BufferSource;
+    algorithm: string;
+    value: BufferSource;
 }
 
 interface WebTransportOptions {
diff --git a/inputfiles/patches/html.kdl b/inputfiles/patches/html.kdl
index 78fc0837c..a75b74ef9 100644
--- a/inputfiles/patches/html.kdl
+++ b/inputfiles/patches/html.kdl
@@ -10,3 +10,9 @@ interface HTMLTableHeaderCellElement extends=HTMLTableCellElement exposed=Window
 interface HTMLDocument extends=Document exposed=Window
 
 interface-mixin MessageEventTarget overrideThis=T typeParameters=T
+
+interface-mixin WindowEventHandlers {
+  // TODO: pass a string instead for deprecated
+  // The unload event is not reliable, consider visibilitychange or pagehide events
+  property onunload deprecated=#true
+}
diff --git a/inputfiles/patches/uievents.kdl b/inputfiles/patches/uievents.kdl
index ba481a127..87be25d7f 100644
--- a/inputfiles/patches/uievents.kdl
+++ b/inputfiles/patches/uievents.kdl
@@ -1,4 +1,7 @@
 dictionary KeyboardEventInit {
+  // TODO: pass a string instead for deprecated
+  // charCode is inconsistent across environments, consider using .key instead
   member charCode deprecated=#true
+  // keyCode is inconsistent across environments, consider using .key instead
   member keyCode deprecated=#true
 }
diff --git a/package-lock.json b/package-lock.json
index 709594458..a7d3889a2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -428,9 +428,9 @@
       }
     },
     "node_modules/@mdn/browser-compat-data": {
-      "version": "7.1.18",
-      "resolved": "https://registry.npmjs.org/@mdn/browser-compat-data/-/browser-compat-data-7.1.18.tgz",
-      "integrity": "sha512-RK4UylAXCRRWbJOFxua8qudPH6976wLeofn341Y/0qGBk+JLdnPIPV2nAg0O3EitSkaa9WiyWo05t0KWq6dfwA==",
+      "version": "7.1.23",
+      "resolved": "https://registry.npmjs.org/@mdn/browser-compat-data/-/browser-compat-data-7.1.23.tgz",
+      "integrity": "sha512-P+fB5bjkq0RaJ6QtuUPUD2MMNgjYuox48SO5+nBMxbFlEvXyKYSw26le10wSkUw59CJB/BA98gU8IOyKo8urSQ==",
       "dev": true,
       "license": "CC0-1.0",
       "peer": true
@@ -1176,9 +1176,9 @@
       ]
     },
     "node_modules/@webref/css": {
-      "version": "8.1.0",
-      "resolved": "https://registry.npmjs.org/@webref/css/-/css-8.1.0.tgz",
-      "integrity": "sha512-6tXF7d9gjvKJom9uJ2Lrk8026Byl4mbo/QKdqqbbs0xDnNs35lKh0mEYkbXVEW1CSyQxOyTZjvNq6yUObbLeJw==",
+      "version": "8.1.1",
+      "resolved": "https://registry.npmjs.org/@webref/css/-/css-8.1.1.tgz",
+      "integrity": "sha512-YkLNPAdhR5BpO38ob82PsJx0xQMFtGGOVKmJQQu7jbBdxzcShcHd3t/Uo4oLxdZm0DV8gsyRK517r1Og99MkaA==",
       "dev": true,
       "license": "MIT",
       "peerDependencies": {
@@ -1200,9 +1200,9 @@
       "license": "MIT"
     },
     "node_modules/@webref/idl": {
-      "version": "3.69.0",
-      "resolved": "https://registry.npmjs.org/@webref/idl/-/idl-3.69.0.tgz",
-      "integrity": "sha512-LRVSPlp3llSvXcB2jRW0Hr8WucUYzflSi5DnI3cya419D3iqSQHFT8HfQEqZzE+3W2/edWW8ToOqYEGkmydckg==",
+      "version": "3.69.1",
+      "resolved": "https://registry.npmjs.org/@webref/idl/-/idl-3.69.1.tgz",
+      "integrity": "sha512-/BIVBhqT81bR1lZ+QCB8MHW7o5YJtJS8LoAF+CY6XczC5KdV9Cg+H7qW/3qZV5E3PMz1xgnqgTZ/XojS3uJWgQ==",
       "dev": true,
       "license": "MIT",
       "peer": true,