feat: support server-sent events (SSE) (#2299)

Co-authored-by: Mateusz Burzyński <mateuszburzynski@gmail.com>

Author: kettanaito

.nvmrc

@@ -1 +1 @@
-v20
+v20

eslint.config.mjs

@@ -16,7 +16,7 @@ export default tseslint.config(
         sourceType: 'module',
       },
     },
-    ignores: ['/lib', '/node', '/native', '/config', 'test'],
+    ignores: ['/lib', '/node', '/native', '/config', '/test'],
     rules: {
       'no-console': [
         'error',
@@ -60,6 +60,7 @@ export default tseslint.config(
     ],
     rules: {
       'no-console': 'off',
+      '@typescript-eslint/prefer-ts-expect-error': 'off',
       '@typescript-eslint/no-unused-vars': 'off',
     },
   },

package.json

@@ -259,13 +259,14 @@
   "devDependencies": {
     "@commitlint/cli": "^18.4.4",
     "@commitlint/config-conventional": "^18.4.4",
+    "@epic-web/test-server": "^0.1.6",
     "@eslint/eslintrc": "^3.3.1",
     "@eslint/js": "^9.34.0",
     "@fastify/websocket": "^8.3.1",
     "@graphql-typed-document-node/core": "^3.2.0",
     "@open-draft/test-server": "^0.4.2",
+    "@playwright/test": "^1.50.1",
     "@ossjs/release": "^0.10.0",
-    "@playwright/test": "^1.48.0",
     "@swc/core": "^1.13.5",
     "@types/eslint__js": "^8.42.3",
     "@types/express": "^4.17.21",

pnpm-lock.yaml

@@ -3,7 +3,7 @@
   "compilerOptions": {
     // Expose browser-specific libraries only for the
     // source code under the "src/browser" directory.
-    "lib": ["DOM", "WebWorker"]
+    "lib": ["DOM", "WebWorker", "DOM.Iterable"]
   },
   "include": ["../../global.d.ts", "./global.browser.d.ts", "./**/*.ts"]
 }

src/browser/tsconfig.browser.json

@@ -17,6 +17,15 @@ export {
   type WebSocketHandlerConnection,
 } from './handlers/WebSocketHandler'
 
+/* Server-Sent Events */
+export {
+  sse,
+  type ServerSentEventRequestHandler,
+  type ServerSentEventResolver,
+  type ServerSentEventResolverExtras,
+  type ServerSentEventMessage,
+} from './sse'
+
 /* Utils */
 export { matchRequestUrl } from './utils/matching/matchRequestUrl'
 export * from './utils/handleRequest'