Revert "feat: upgrade to jsdom@20 (jestjs#13037)"

This reverts commit 73de40d.

docs/UpgradingToJest29.md

@@ -30,7 +30,7 @@ If you want to keep the old behavior, you can set the `snapshotFormat` property
 
 ## JSDOM upgrade
 
-`jest-environment-jsdom` has upgraded `jsdom` from v19 to v20. Due to issues with `@types/jsdom`, if you extend this environment, you might run into type errors. See https://github.com/DefinitelyTyped/DefinitelyTyped/discussions/60999#discussioncomment-3158685.
+`jest-environment-jsdom` has upgraded `jsdom` from v19 to v20. Note that _if_ you use `jest-environment-jsdom`, the minimum TypeScript version is set to `4.5`. 
 
 ## `pretty-format`
 

packages/jest-environment-jsdom/package.json

@@ -20,6 +20,7 @@
     "@jest/environment": "^29.0.0-alpha.0",
     "@jest/fake-timers": "^29.0.0-alpha.0",
     "@jest/types": "^29.0.0-alpha.0",
+    "@types/jsdom": "^20.0.0",
     "@types/node": "*",
     "jest-mock": "^29.0.0-alpha.0",
     "jest-util": "^29.0.0-alpha.0",

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

@@ -5,10 +5,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-/// <reference lib="dom" />
-
 import type {Context} from 'vm';
-// @ts-expect-error: TODO: we're missing v20 types
 import {JSDOM, ResourceLoader, VirtualConsole} from 'jsdom';
 import type {
   EnvironmentContext,
@@ -30,8 +27,7 @@ type Win = Window &
   };
 
 export default class JSDOMEnvironment implements JestEnvironment<number> {
-  // TODO: make non-privat when we have `@types/jsdom` again
-  private dom: JSDOM | null;
+  dom: JSDOM | null;
   fakeTimers: LegacyFakeTimers<number> | null;
   fakeTimersModern: ModernFakeTimers | null;
   global: Win;
@@ -44,7 +40,6 @@ export default class JSDOMEnvironment implements JestEnvironment<number> {
 
     const virtualConsole = new VirtualConsole();
     virtualConsole.sendTo(context.console, {omitJSDOMErrors: true});
-    // @ts-expect-error: TODO: we're missing v20 types
     virtualConsole.on('jsdomError', error => {
       context.console.error(error);
     });

yarn.lock

@@ -5234,6 +5234,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/jsdom@npm:^20.0.0":
+  version: 20.0.0
+  resolution: "@types/jsdom@npm:20.0.0"
+  dependencies:
+    "@types/node": "*"
+    "@types/tough-cookie": "*"
+    parse5: ^7.0.0
+  checksum: 13e67d31347e02d46ec6a23919b3ce39d86136665922a2a6cb977e216a2f46c22d2f025d0586a64ab492ebaa5f43da669b6f173a5a8cfd3e3bb7c9d19b6cfa9e
+  languageName: node
+  linkType: hard
+
 "@types/json-schema@npm:*, @types/json-schema@npm:^7.0.4, @types/json-schema@npm:^7.0.5, @types/json-schema@npm:^7.0.8, @types/json-schema@npm:^7.0.9":
   version: 7.0.11
   resolution: "@types/json-schema@npm:7.0.11"
@@ -5612,6 +5623,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/tough-cookie@npm:*":
+  version: 4.0.2
+  resolution: "@types/tough-cookie@npm:4.0.2"
+  checksum: e055556ffdaa39ad85ede0af192c93f93f986f4bd9e9426efdc2948e3e2632db3a4a584d4937dbf6d7620527419bc99e6182d3daf2b08685e710f2eda5291905
+  languageName: node
+  linkType: hard
+
 "@types/trusted-types@npm:^2.0.2":
   version: 2.0.2
   resolution: "@types/trusted-types@npm:2.0.2"
@@ -13262,6 +13280,7 @@ __metadata:
     "@jest/fake-timers": ^29.0.0-alpha.0
     "@jest/test-utils": ^29.0.0-alpha.0
     "@jest/types": ^29.0.0-alpha.0
+    "@types/jsdom": ^20.0.0
     "@types/node": "*"
     jest-mock: ^29.0.0-alpha.0
     jest-util: ^29.0.0-alpha.0