example with typescript build failing

packages/playwright-test-types/.gitignore

@@ -0,0 +1 @@
+node_modules/**

packages/playwright-test-types/package.json

@@ -0,0 +1,13 @@
+{
+  "private": true,
+  "name": "playwright-test-types",
+  "version": "0.0.0",
+  "description": "Check types",
+  "main": "index.js",
+  "scripts": {
+    "tsc": "tsc -p ."
+  },
+  "dependencies": {
+    "playwright-core": "^0.9.23"
+  }
+}

packages/playwright-test-types/src/index.ts

@@ -0,0 +1,4 @@
+import assert from "assert";
+import playwright from "playwright-core";
+
+assert(playwright.devices["iPhone 7"]);

packages/playwright-test-types/tsconfig.json

@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "module": "commonjs",
+    "lib": ["esnext", "dom"],
+    "sourceMap": true,
+    "rootDir": "./src",
+    "outDir": "./lib",
+    "strict": true,
+    "declaration": true
+  },
+  "compileOnSave": true,
+  "include": ["src/**/*.ts"],
+  "exclude": ["node_modules"]
+}