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How to use evalOnSelectorAndWaitForSignals method in Playwright Internal

Best JavaScript code snippet using playwright-internal

frameDispatcher.js

Source:frameDispatcher.js

...126  }127  async evalOnSelector(params, metadata) {128    return {129      value: (0, _jsHandleDispatcher.serializeResult)(130        await this._frame.evalOnSelectorAndWaitForSignals(131          params.selector,132          !!params.strict,133          params.expression,134          params.isFunction,135          (0, _jsHandleDispatcher.parseArgument)(params.arg)136        )137      )138    }139  }140  async evalOnSelectorAll(params, metadata) {141    return {142      value: (0, _jsHandleDispatcher.serializeResult)(143        await this._frame.evalOnSelectorAllAndWaitForSignals(144          params.selector,...

elementHandlerDispatcher.js

Source:elementHandlerDispatcher.js

...179    };180  }181  async evalOnSelector(params, metadata) {182    return {183      value: (0, _jsHandleDispatcher.serializeResult)(await this._elementHandle.evalOnSelectorAndWaitForSignals(params.selector, !!params.strict, params.expression, params.isFunction, (0, _jsHandleDispatcher.parseArgument)(params.arg)))184    };185  }186  async evalOnSelectorAll(params, metadata) {187    return {188      value: (0, _jsHandleDispatcher.serializeResult)(await this._elementHandle.evalOnSelectorAllAndWaitForSignals(params.selector, params.expression, params.isFunction, (0, _jsHandleDispatcher.parseArgument)(params.arg)))189    };190  }191  async waitForElementState(params, metadata) {192    await this._elementHandle.waitForElementState(metadata, params.state, params);193  }194  async waitForSelector(params, metadata) {195    return {196      element: ElementHandleDispatcher.fromNullable(this._scope, await this._elementHandle.waitForSelector(metadata, params.selector, params))197    };...

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.evaluateOnSelectorAndWaitForSignals('html', 'foo', 'bar');7  await browser.close();8})();9const { chromium } = require('playwright');10(async () => {11  const browser = await chromium.launch();12  const context = await browser.newContext();13  const page = await context.newPage();14  page.on('foo', () => console.log('foo event fired'));15  page.on('bar', () => console.log('bar event fired'));16  await page.evaluate(() => {17    window.dispatchEvent(new Event('foo'));18    window.dispatchEvent(new Event('bar'));19  });20  await browser.close();21})();22const { chromium } = require('playwright');23(async () => {24  const browser = await chromium.launch();25  const context = await browser.newContext();26  const page = await context.newPage();27  page.on('foo', () => console.log('foo event fired'));28  page.on('bar', () => console.log('bar event fired'));29  await page.evaluate(() => {30    window.dispatchEvent(new Event('foo'));31    window.dispatchEvent(new Event('bar'));32  });33  await browser.close();34})();35const { chromium } = require('playwright');36(async () => {37  const browser = await chromium.launch();38  const context = await browser.newContext();39  const page = await context.newPage();40  page.on('foo', () => console.log('foo event fired'));41  page.on('bar', () => console.log('bar event fired'));42  await page.evaluate(() => {43    window.dispatchEvent(new Event('foo'));44    window.dispatchEvent(new Event('bar'));45  });46  await browser.close();47})();48const {

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch({ headless: false });4  const page = await browser.newPage();5  const result = await page.evaluateOnSelectorAndWaitForSignals('input[name="q"]', 'input', { timeout: 5000 });6  console.log(result);7  await browser.close();8})();9const { chromium } = require('playwright');10(async () => {11  const browser = await chromium.launch({ headless: false });12  const page = await browser.newPage();13  const result = await page.evaluateOnSelectorAndWaitForSignals('input[name="q"]', 'input', { timeout: 5000, polling: 'raf' });14  console.log(result);15  await browser.close();16})();17const { chromium } = require('playwright');18(async () => {19  const browser = await chromium.launch({ headless: false });20  const page = await browser.newPage();21  const result = await page.evaluateOnSelectorAndWaitForSignals('input[name="q"]', 'input', { timeout: 5000, polling: 'mutation' });22  console.log(result);23  await browser.close();24})();

Using AI Code Generation

1const assert = require('assert');2const playwright = require('playwright');3(async () => {4  for (const browserType of BROWSER) {5    const browser = await browserType.launch();6    const context = await browser.newContext();7    const page = await context.newPage();8    const result = await page.evalOnSelectorAndWaitForSignals('body', (element, { signal }) => {9      return new Promise(resolve => {10        const observer = new MutationObserver(() => {11          resolve('resolved');12        });13        observer.observe(element, { childList: true });14        signal.addEventListener('abort', () => {15          observer.disconnect();16          resolve('aborted');17        });18      });19    });20    assert.strictEqual(result, 'resolved');21    await browser.close();22  }23})();

Using AI Code Generation

1const { chromium } = require('playwright');2const fs = require('fs');3const path = require('path');4(async () => {5  const browser = await chromium.launch();6  const page = await browser.newPage();7  const client = await page.context().newCDPSession(page);8  await client.send('Runtime.enable');9  const result = await client.send('Runtime.evalOnSelectorAndWaitForSignals', {10  });11  console.log(result);12  await browser.close();13})();14    at CDPSession.send (C:\Users\user\Documents\test\playwright\node_modules\playwright\lib\cdp.js:71:13)15    at CDPSession.send (C:\Users\user\Documents\test\playwright\node_modules\playwright\lib\cdp.js:121:25)16    at CDPSession.send (C:\Users\user\Documents\test\playwright\node_modules\playwright\lib\cdp.js:121:25)17    at CDPSession.send (C:\Users\user\Documents\test\playwright\node_modules\playwright\lib\cdp.js:121:25)18    at CDPSession.send (C:\Users\user\Documents\test\playwright\node_modules\playwright\lib\cdp.js:121:25)19    at CDPSession.send (C:\Users\user\Documents\test\playwright\node_modules\playwright\lib\cdp.js:121:25)20    at CDPSession.send (C:\Users\user\Documents\test\playwright\node_modules\playwright\lib\cdp.js:121:25)21    at CDPSession.send (C:\Users\user\Documents\test\playwright\node_modules\playwright\lib\cdp.js:121:25)22    at CDPSession.send (C:\Users\user\Documents\test\playwright\node_modules\playwright\lib\cdp.js:121:25)

Using AI Code Generation

1const { chromium } = require('playwright');2const { getTestState } = require('@playwright/test');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.click('text=Get started');8  await page.waitForNavigation();9  await page.click('text=Docs');10  await page.waitForNavigation();11  await page.click('text=API');12  const testState = getTestState();13  const signal = testState.signal;14  const result = await page.evaluate(async (signal) => {15    return await window.evalOnSelectorAndWaitForSignals('text=Page', signal, 'signal');16  }, signal);17  console.log(result);18  await browser.close();19})();20{21}

Using AI Code Generation

1const { evalOnSelectorAndWaitForSignals } = require('playwright/lib/internal/evalOnSelectorAndWaitForSignals');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  const [result] = await evalOnSelectorAndWaitForSignals(page, 'body', 'function() {8    return new Promise(resolve => {9      const interval = setInterval(() => {10        resolve('done');11        clearInterval(interval);12      }, 1000);13    });14  }');15  console.log(result);16  await browser.close();17})();

Using AI Code Generation

1const { chromium } = require('playwright-chromium');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  const frame = page.mainFrame();7  await frame.evaluateHandle(selector => {8    const element = document.querySelector(selector);9    return element;10  }, selector);11  await browser.close();12})();13const { chromium } = require('playwright-chromium');14(async () => {15  const browser = await chromium.launch();16  const context = await browser.newContext();17  const page = await context.newPage();18  const frame = page.mainFrame();19  await frame.evaluateHandle(selector => {20    const element = document.querySelector(selector);21    return element;22  }, selector);23  await browser.close();24})();25const { chromium } = require('playwright-chromium');26(async () => {27  const browser = await chromium.launch();28  const context = await browser.newContext();29  const page = await context.newPage();30  const frame = page.mainFrame();31  await frame.evaluateHandle(selector => {32    const element = document.querySelector(selector);33    return element;34  }, selector);35  await browser.close();36})();

Using AI Code Generation

1const { test, expect } = require('@playwright/test');2test('test', async ({ page }) => {3  await page.waitForSelector('input[title="Search"]');4  await page.click('input[title="Search"]');5  await page.fill('input[title="Search"]', 'test');6  await page.keyboard.press('Enter');7  await page.waitForSelector('div[role="heading"]');8  const results = await page.$$eval('div[role="heading"]', (el) => el.length);9  expect(results).toBeGreaterThan(0);10});11const { test, expect } = require('@playwright/test');12test('test', async ({ page }) => {13  await page.waitForSelector('input[title="Search"]');14  await page.click('input[title="Search"]');15  await page.fill('input[title="Search"]', 'test');16  await page.keyboard.press('Enter');17  await page.waitForSelector('div[role="heading"]');18  const results = await page.evalOnSelectorAndWaitForSignals('div[role="heading"]', (el) => el.length);19  expect(results).toBeGreaterThan(0);20});

Playwright tutorial

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Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
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