docs(selectors): fixed selector register example (#3169)

Author: mxschmitt

docs/api.md

@@ -3686,7 +3686,7 @@ const { selectors, firefox } = require('playwright');  // Or 'chromium' or 'webk
 
   const browser = await firefox.launch();
   const page = await browser.newPage();
-  await page.goto('https://example.com');
+  await page.setContent(`<div><button>Click me</button></div>`);
 
   // Use the selector prefixed with its name.
   const button = await page.$('tag=button');

test/workers.jest.js

@@ -58,13 +58,13 @@ describe('Workers', function() {
   });
   it('should evaluate', async function({page}) {
     const workerCreatedPromise = page.waitForEvent('worker');
-    page.evaluate(() => new Worker(URL.createObjectURL(new Blob(['console.log(1)'], {type: 'application/javascript'}))));
+    await page.evaluate(() => new Worker(URL.createObjectURL(new Blob(['console.log(1)'], {type: 'application/javascript'}))));
     const worker = await workerCreatedPromise;
     expect(await worker.evaluate('1+1')).toBe(2);
   });
   it('should report errors', async function({page}) {
     const errorPromise = new Promise(x => page.on('pageerror', x));
-    page.evaluate(() => new Worker(URL.createObjectURL(new Blob([`
+    await page.evaluate(() => new Worker(URL.createObjectURL(new Blob([`
       setTimeout(() => {
         // Do a console.log just to check that we do not confuse it with an error.
         console.log('hey');
@@ -77,7 +77,7 @@ describe('Workers', function() {
   it('should clear upon navigation', async function({server, page}) {
     await page.goto(server.EMPTY_PAGE);
     const workerCreatedPromise = page.waitForEvent('worker');
-    page.evaluate(() => new Worker(URL.createObjectURL(new Blob(['console.log(1)'], {type: 'application/javascript'}))));
+    await page.evaluate(() => new Worker(URL.createObjectURL(new Blob(['console.log(1)'], {type: 'application/javascript'}))));
     const worker = await workerCreatedPromise;
     expect(page.workers().length).toBe(1);
     let destroyed = false;
@@ -89,7 +89,7 @@ describe('Workers', function() {
   it('should clear upon cross-process navigation', async function({server, page}) {
     await page.goto(server.EMPTY_PAGE);
     const workerCreatedPromise = page.waitForEvent('worker');
-    page.evaluate(() => new Worker(URL.createObjectURL(new Blob(['console.log(1)'], {type: 'application/javascript'}))));
+    await page.evaluate(() => new Worker(URL.createObjectURL(new Blob(['console.log(1)'], {type: 'application/javascript'}))));
     const worker = await workerCreatedPromise;
     expect(page.workers().length).toBe(1);
     let destroyed = false;

utils/generate_types/test/test.ts

@@ -63,7 +63,7 @@ playwright.chromium.launch().then(async browser => {
   page.on('console', message => {
     console.log(message.text());
   });
-  page.evaluate(() => console.log(5, 'hello', { foo: 'bar' }));
+  await page.evaluate(() => console.log(5, 'hello', { foo: 'bar' }));
 
   {
     const result = await page.evaluate(() => {