feat: Increase specificity of WebSocket.readyState (microsoft#2109)

tpict · saschanaz · web-flow · commit 33081222e69b · 2025-08-27T10:54:08.000Z
Co-authored-by: saschanaz &lt;saschanaz@users.noreply.github.com&gt;
diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
@@ -36680,7 +36680,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: 0 | 1 | 2 | 3;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/serviceworker.generated.d.ts b/baselines/serviceworker.generated.d.ts
@@ -10472,7 +10472,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: 0 | 1 | 2 | 3;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/sharedworker.generated.d.ts b/baselines/sharedworker.generated.d.ts
@@ -10015,7 +10015,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: 0 | 1 | 2 | 3;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.5/dom.generated.d.ts b/baselines/ts5.5/dom.generated.d.ts
@@ -36657,7 +36657,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: 0 | 1 | 2 | 3;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.5/serviceworker.generated.d.ts b/baselines/ts5.5/serviceworker.generated.d.ts
@@ -10472,7 +10472,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: 0 | 1 | 2 | 3;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.5/sharedworker.generated.d.ts b/baselines/ts5.5/sharedworker.generated.d.ts
@@ -10015,7 +10015,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: 0 | 1 | 2 | 3;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.5/webworker.generated.d.ts b/baselines/ts5.5/webworker.generated.d.ts
@@ -11906,7 +11906,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: 0 | 1 | 2 | 3;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.6/dom.generated.d.ts b/baselines/ts5.6/dom.generated.d.ts
@@ -36680,7 +36680,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: 0 | 1 | 2 | 3;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.6/serviceworker.generated.d.ts b/baselines/ts5.6/serviceworker.generated.d.ts
@@ -10472,7 +10472,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: 0 | 1 | 2 | 3;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.6/sharedworker.generated.d.ts b/baselines/ts5.6/sharedworker.generated.d.ts
@@ -10015,7 +10015,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: 0 | 1 | 2 | 3;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/ts5.6/webworker.generated.d.ts b/baselines/ts5.6/webworker.generated.d.ts
@@ -11906,7 +11906,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: 0 | 1 | 2 | 3;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/baselines/webworker.generated.d.ts b/baselines/webworker.generated.d.ts
@@ -11906,7 +11906,7 @@ interface WebSocket extends EventTarget {
      *
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)
      */
-    readonly readyState: number;
+    readonly readyState: 0 | 1 | 2 | 3;
     /**
      * The **`WebSocket.url`** read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
      *
diff --git a/inputfiles/overridingTypes.jsonc b/inputfiles/overridingTypes.jsonc
@@ -1953,6 +1953,14 @@
                             "type": "MessageEvent"
                         }
                     ]
+                },
+                "properties": {
+                    "property": {
+                        "readyState": {
+                            "name": "readyState",
+                            "overrideType": "0 | 1 | 2 | 3"
+                        }
+                    }
                 }
             },
             "WebTransportDatagramDuplexStream": {

Original file line number	Diff line number	Diff line change
`@@ -36680,7 +36680,7 @@ interface WebSocket extends EventTarget {`
`36680`	`36680`	`*`
`36681`	`36681`	`* [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)`
`36682`	`36682`	`*/`
`36683`		`- readonly readyState: number;`
	`36683`	`+ readonly readyState: 0 \| 1 \| 2 \| 3;`
`36684`	`36684`	`/**`
`36685`	`36685`	* The `WebSocket.url` read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
`36686`	`36686`	`*`
Original file line number	Diff line number	Diff line change
`@@ -10472,7 +10472,7 @@ interface WebSocket extends EventTarget {`
`10472`	`10472`	`*`
`10473`	`10473`	`* [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)`
`10474`	`10474`	`*/`
`10475`		`- readonly readyState: number;`
	`10475`	`+ readonly readyState: 0 \| 1 \| 2 \| 3;`
`10476`	`10476`	`/**`
`10477`	`10477`	* The `WebSocket.url` read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
`10478`	`10478`	`*`
Original file line number	Diff line number	Diff line change
`@@ -10015,7 +10015,7 @@ interface WebSocket extends EventTarget {`
`10015`	`10015`	`*`
`10016`	`10016`	`* [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)`
`10017`	`10017`	`*/`
`10018`		`- readonly readyState: number;`
	`10018`	`+ readonly readyState: 0 \| 1 \| 2 \| 3;`
`10019`	`10019`	`/**`
`10020`	`10020`	* The `WebSocket.url` read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
`10021`	`10021`	`*`
Original file line number	Diff line number	Diff line change
`@@ -36657,7 +36657,7 @@ interface WebSocket extends EventTarget {`
`36657`	`36657`	`*`
`36658`	`36658`	`* [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)`
`36659`	`36659`	`*/`
`36660`		`- readonly readyState: number;`
	`36660`	`+ readonly readyState: 0 \| 1 \| 2 \| 3;`
`36661`	`36661`	`/**`
`36662`	`36662`	* The `WebSocket.url` read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
`36663`	`36663`	`*`
Original file line number	Diff line number	Diff line change
`@@ -11906,7 +11906,7 @@ interface WebSocket extends EventTarget {`
`11906`	`11906`	`*`
`11907`	`11907`	`* [MDN Reference](https://developer.mozilla.org/docs/Web/API/WebSocket/readyState)`
`11908`	`11908`	`*/`
`11909`		`- readonly readyState: number;`
	`11909`	`+ readonly readyState: 0 \| 1 \| 2 \| 3;`
`11910`	`11910`	`/**`
`11911`	`11911`	* The `WebSocket.url` read-only property returns the absolute URL of the WebSocket as resolved by the constructor.
`11912`	`11912`	`*`