feat: upgrade to JSDOM@21

packages/jest-environment-jsdom/package.json

@@ -24,7 +24,7 @@
     "@types/node": "*",
     "jest-mock": "workspace:^",
     "jest-util": "workspace:^",
-    "jsdom": "^20.0.0"
+    "jsdom": "^21.1.0"
   },
   "devDependencies": {
     "@jest/test-utils": "workspace:^"

packages/jest-environment-jsdom/src/index.ts

@@ -160,13 +160,6 @@ export default class JSDOMEnvironment implements JestEnvironment<number> {
         this.global.removeEventListener('error', this.errorEventListener);
       }
       this.global.close();
-
-      // Dispose "document" to prevent "load" event from triggering.
-
-      // Note that this.global.close() will trigger the CustomElement::disconnectedCallback
-      // Do not reset the document before CustomElement disconnectedCallback function has finished running,
-      // document should be accessible within disconnectedCallback.
-      Object.defineProperty(this.global, 'document', {value: null});
     }
     this.errorEventListener = null;
     // @ts-expect-error: this.global not allowed to be `null`

yarn.lock

@@ -12705,7 +12705,7 @@ __metadata:
     "@types/node": "*"
     jest-mock: "workspace:^"
     jest-util: "workspace:^"
-    jsdom: ^20.0.0
+    jsdom: ^21.1.0
   peerDependencies:
     canvas: ^2.5.0
   peerDependenciesMeta:
@@ -13414,9 +13414,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"jsdom@npm:^20.0.0":
-  version: 20.0.3
-  resolution: "jsdom@npm:20.0.3"
+"jsdom@npm:^21.1.0":
+  version: 21.1.0
+  resolution: "jsdom@npm:21.1.0"
   dependencies:
     abab: ^2.0.6
     acorn: ^8.8.1
@@ -13449,7 +13449,7 @@ __metadata:
   peerDependenciesMeta:
     canvas:
       optional: true
-  checksum: 6e2ae21db397133a061b270c26d2dbc0b9051733ea3b896a7ece78d79f475ff0974f766a413c1198a79c793159119169f2335ddb23150348fbfdcfa6f3105536
+  checksum: 2c89c72a6f399184ffc8de30bbdd86283086dbd72bb3a40667102d3f12af141c7517ffb78150a3bb6883a654e8c7d0266c3328d1c387a2b9a1fd0729dc537954
   languageName: node
   linkType: hard