Set up Playwright for fast-element testing

packages/fast-element/package.json

@@ -117,6 +117,8 @@
     "prettier:diff": "prettier --config ../../.prettierrc \"**/*.ts\" --list-different",
     "eslint": "eslint . --ext .ts",
     "eslint:fix": "eslint . --ext .ts --fix",
+    "test:playwright": "playwright test",
+    "test-server": "npx vite test/ --clearScreen false",
     "test": "npm run eslint && npm run test-chrome:verbose && npm run doc:ci && npm run doc:exports:ci",
     "test-node": "mocha --reporter min --exit dist/esm/__test__/setup-node.js './dist/esm/**/*.spec.js'",
     "test-node:verbose": "mocha --reporter spec --exit dist/esm/__test__/setup-node.js './dist/esm/**/*.spec.js'",

packages/fast-element/playwright.config.ts

@@ -0,0 +1,18 @@
+import { defineConfig, devices } from "@playwright/test";
+
+export default defineConfig({
+    testDir: ".",
+    testMatch: "**/*.pw.spec.ts",
+    retries: 3,
+    projects: [
+        {
+            name: "chromium",
+            use: { ...devices["Desktop Chrome"] },
+        },
+    ],
+    webServer: {
+        command: "npm run test-server",
+        port: 5173,
+        reuseExistingServer: true,
+    },
+});

packages/fast-element/src/components/fast-definitions.ts

@@ -1,6 +1,6 @@
 import { Constructable, isString, KernelServiceId } from "../interfaces.js";
 import { Observable } from "../observation/observable.js";
-import { createTypeRegistry, FAST, TypeRegistry } from "../platform.js";
+import { createTypeRegistry, FAST, type TypeRegistry } from "../platform.js";
 import { ComposableStyles, ElementStyles } from "../styles/element-styles.js";
 import type { ElementViewTemplate } from "../templating/template.js";
 import { AttributeConfiguration, AttributeDefinition } from "./attributes.js";