ci: create npm workspaces and sort out dependencies

This requires at least npm v7.

Reference: https://docs.npmjs.com/cli/v10/using-npm/workspaces

Note: @types/node is pinned at `18.15.3` because it's the last version
which supports TypeScript v4.2.

.github/workflows/ci.yml

@@ -32,14 +32,16 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
+      # in order to test our compliance with TypeScript v4.2 (older versions are not tested)
       - name: Install TypeScript 4.2
         run: npm i typescript@4.2
         if: ${{ matrix.node-version == '16' }}
 
+      - name: Compile each package
+        run: npm run compile --workspaces
+
       - name: Run tests
-        run: npm test
-        env:
-          CI: true
+        run: npm test --workspaces
 
   build-examples:
     runs-on: ubuntu-latest

.gitignore

@@ -12,3 +12,4 @@ coverage
 .idea
 .nyc_output
 dist/
+build/

package.json

@@ -0,0 +1,15 @@
+{
+  "private": true,
+  "workspaces": [
+    "packages/socket.io-parser",
+    "packages/socket.io-client",
+    "packages/socket.io"
+  ],
+  "overrides": {
+    "@types/estree": "0.0.52",
+    "@types/lodash": "4.14.189"
+  },
+  "devDependencies": {
+    "@types/node": "18.15.3"
+  }
+}

packages/socket.io-client/lib/manager.ts

@@ -404,6 +404,7 @@ export class Manager<
       on(socket, "data", this.ondata.bind(this)),
       on(socket, "error", this.onerror.bind(this)),
       on(socket, "close", this.onclose.bind(this)),
+      // @ts-ignore
       on(this.decoder, "decoded", this.ondecoded.bind(this))
     );
   }

packages/socket.io-client/package.json

@@ -61,7 +61,6 @@
     "@rollup/plugin-node-resolve": "^13.0.5",
     "@sinonjs/fake-timers": "^7.1.2",
     "@types/mocha": "^9.0.0",
-    "@types/node": "^16.7.6",
     "@types/sinonjs__fake-timers": "^6.0.3",
     "@wdio/cli": "^7.26.0",
     "@wdio/local-runner": "^7.26.0",
@@ -84,7 +83,7 @@
     "text-blob-builder": "0.0.1",
     "ts-loader": "^8.3.0",
     "ts-node": "^10.2.1",
-    "tsd": "^0.17.0",
+    "tsd": "^0.27.0",
     "typescript": "^4.4.2"
   },
   "scripts": {

packages/socket.io-parser/package.json

@@ -29,7 +29,6 @@
     "@babel/preset-env": "~7.9.6",
     "@babel/register": "^7.18.9",
     "@types/debug": "^4.1.5",
-    "@types/node": "^14.11.1",
     "@wdio/cli": "^7.26.0",
     "@wdio/local-runner": "^7.26.0",
     "@wdio/mocha-framework": "^7.26.0",

packages/socket.io/test/socket.io.test-d.ts

@@ -413,7 +413,7 @@ describe("server", () => {
         const sansTimeout = sio.in("1");
         // Without timeout, `emitWithAck` shouldn't accept any events
         expectType<never>(
-          undefined as Parameters<typeof sansTimeout["emitWithAck"]>[0]
+          undefined as Parameters<(typeof sansTimeout)["emitWithAck"]>[0]
         );
         // @ts-expect-error - "noArgs" doesn't have a callback and is thus excluded
         sio.timeout(0).emitWithAck("noArgs");