Address code review feedback and update README

Co-authored-by: dgreif <[email protected]>

Author: Copilot

README.md

@@ -68,9 +68,12 @@ Browsers without native [custom element support][support] require a [polyfill][]
 
 ```
 npm install
+npx playwright install chromium
 npm test
 ```
 
+Note: Tests use Vitest with Playwright browser mode. The `npx playwright install chromium` command downloads the browser needed for running tests.
+
 ## License
 
 Distributed under the MIT license. See LICENSE for details.

test/test.spec.js

@@ -9,7 +9,7 @@ describe('remoteForm', function () {
     document.body.innerHTML = `
       <form action="/ok" class="my-remote-form remote-widget" method="post" target="submit-fallback">
         <input name="query" value="hello">
-        <button type="submit">Submit<button>
+        <button type="submit">Submit</button>
       </form>
 
       <iframe name="submit-fallback" style="display: none"></iframe>

vitest.config.ts

@@ -8,9 +8,6 @@ export default defineConfig({
       instances: [
         {
           browser: 'chromium',
-          launch: {
-            executablePath: '/usr/bin/chromium-browser',
-          },
         },
       ],
       headless: true,