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How to use createJSHandle method in Puppeteer

Best JavaScript code snippet using puppeteer

ExecutionContext.js

Source:ExecutionContext.js

...79        userGesture: true80      }).catch(rewriteError);81      if (exceptionDetails)82        throw new Error('Evaluation failed: ' + helper.getExceptionMessage(exceptionDetails));83      return createJSHandle(this, remoteObject);84    }85    if (typeof pageFunction !== 'function')86      throw new Error(`Expected to get |string| or |function| as the first argument, but got "${pageFunction}" instead.`);87    let functionText = pageFunction.toString();88    try {89      new Function('(' + functionText + ')');90    } catch (e1) {91      // This means we might have a function shorthand. Try another92      // time prefixing 'function '.93      if (functionText.startsWith('async '))94        functionText = 'async function ' + functionText.substring('async '.length);95      else96        functionText = 'function ' + functionText;97      try {98        new Function('(' + functionText + ')');99      } catch (e2) {100        // We tried hard to serialize, but there's a weird beast here.101        throw new Error('Passed function is not well-serializable!');102      }103    }104    let callFunctionOnPromise;105    try {106      callFunctionOnPromise = this._client.send('Runtime.callFunctionOn', {107        functionDeclaration: functionText + '\n' + suffix + '\n',108        executionContextId: this._contextId,109        arguments: args.map(convertArgument.bind(this)),110        returnByValue: false,111        awaitPromise: true,112        userGesture: true113      });114    } catch (err) {115      if (err instanceof TypeError && err.message === 'Converting circular structure to JSON')116        err.message += ' Are you passing a nested JSHandle?';117      throw err;118    }119    const {120      exceptionDetails,121      result: remoteObject122    } = await callFunctionOnPromise.catch(rewriteError);123    if (exceptionDetails)124      throw new Error('Evaluation failed: ' + helper.getExceptionMessage(exceptionDetails));125    return createJSHandle(this, remoteObject);126    /**127     * @param {*} arg128     * @return {*}129     * @this {ExecutionContext}130     */131    function convertArgument(arg) {132      if (typeof arg === 'bigint') // eslint-disable-line valid-typeof133        return {134          unserializableValue: `${arg.toString()}n`135        };136      if (Object.is(arg, -0))137        return {138          unserializableValue: '-0'139        };140      if (Object.is(arg, Infinity))141        return {142          unserializableValue: 'Infinity'143        };144      if (Object.is(arg, -Infinity))145        return {146          unserializableValue: '-Infinity'147        };148      if (Object.is(arg, NaN))149        return {150          unserializableValue: 'NaN'151        };152      const objectHandle = arg && (arg instanceof JSHandle) ? arg : null;153      if (objectHandle) {154        if (objectHandle._context !== this)155          throw new Error('JSHandles can be evaluated only in the context they were created!');156        if (objectHandle._disposed)157          throw new Error('JSHandle is disposed!');158        if (objectHandle._remoteObject.unserializableValue)159          return {160            unserializableValue: objectHandle._remoteObject.unserializableValue161          };162        if (!objectHandle._remoteObject.objectId)163          return {164            value: objectHandle._remoteObject.value165          };166        return {167          objectId: objectHandle._remoteObject.objectId168        };169      }170      return {171        value: arg172      };173    }174    /**175     * @param {!Error} error176     * @return {!Protocol.Runtime.evaluateReturnValue}177     */178    function rewriteError(error) {179      if (error.message.endsWith('Cannot find context with specified id'))180        throw new Error('Execution context was destroyed, most likely because of a navigation.');181      throw error;182    }183  }184  /**185   * @param {!JSHandle} prototypeHandle186   * @return {!Promise<!JSHandle>}187   */188  async queryObjects(prototypeHandle) {189    assert(!prototypeHandle._disposed, 'Prototype JSHandle is disposed!');190    assert(prototypeHandle._remoteObject.objectId, 'Prototype JSHandle must not be referencing primitive value');191    const response = await this._client.send('Runtime.queryObjects', {192      prototypeObjectId: prototypeHandle._remoteObject.objectId193    });194    return createJSHandle(this, response.objects);195  }196  /**197   * @param {Puppeteer.ElementHandle} elementHandle198   * @return {Promise<Puppeteer.ElementHandle>}199   */200  async _adoptElementHandle(elementHandle) {201    assert(elementHandle.executionContext() !== this, 'Cannot adopt handle that already belongs to this execution context');202    assert(this._world, 'Cannot adopt handle without DOMWorld');203    const nodeInfo = await this._client.send('DOM.describeNode', {204      objectId: elementHandle._remoteObject.objectId,205    });206    const {207      object208    } = await this._client.send('DOM.resolveNode', {209      backendNodeId: nodeInfo.node.backendNodeId,210      executionContextId: this._contextId,211    });212    return /** @type {Puppeteer.ElementHandle}*/ (createJSHandle(this, object));213  }214}215export {216  ExecutionContext,217  EVALUATION_SCRIPT_URL...

index.js

Source:index.js

...29  });30  await app.exposeFunction('$eval', async(backendNodeId, func, ...args) => {31    const page = await pagePromise;32    const {object} = await page._client.send('DOM.resolveNode', {backendNodeId});33    const handle = createJSHandle(await page.mainFrame().executionContext(), object);34    const dummy = () => void 0;35    dummy.toString = () => func;36    return await page.evaluate(dummy, handle, ...args);37  });38  await app.exposeFunction('keypress', async key => {39    const page = await pagePromise;40    await page.keyboard.press(key);41  });42  await app.exposeFunction('changeURL', async url => {43    const page = await pagePromise;44    await page.goto(prependHttp(url));45  });46  await app.exposeFunction('goForward', async url => {47    const page = await pagePromise;...

Using AI Code Generation

1const puppeteer = require('puppeteer');2(async () => {3  const browser = await puppeteer.launch({headless: false});4  const page = await browser.newPage();5  await page.waitForSelector('input[title="Search"]');6  await page.type('input[title="Search"]', 'Puppeteer');7  await page.click('input[value="Google Search"]');8  await page.waitForSelector('div#search');9  const searchResults = await page.$eval('div#search', el => el.innerHTML);10  const handle = await page.evaluateHandle(() => document.body);11  await page.evaluate(body => body.style.background = 'red', handle);12  await page.screenshot({path: 'screenshot.png'});13  await browser.close();14})();

Using AI Code Generation

1const puppeteer = require('puppeteer');2(async () => {3  const browser = await puppeteer.launch();4  const page = await browser.newPage();5  const handle = await page.evaluateHandle(() => document.body);6  await browser.close();7})();8const puppeteer = require('puppeteer');9(async () => {10  const browser = await puppeteer.launch();11  const page = await browser.newPage();12  const handle = await page.evaluateHandle(() => document.body);13  await browser.close();14})();15const puppeteer = require('puppeteer');16(async () => {17  const browser = await puppeteer.launch();18  const page = await browser.newPage();19  const handle = await page.evaluateHandle(() => document.body);20  await browser.close();21})();22const puppeteer = require('puppeteer');23(async () => {24  const browser = await puppeteer.launch();25  const page = await browser.newPage();26  const handle = await page.evaluateHandle(() => document.body);27  await browser.close();28})();29const puppeteer = require('puppeteer');30(async () => {31  const browser = await puppeteer.launch();32  const page = await browser.newPage();33  const handle = await page.evaluateHandle(() => document.body);34  await browser.close();35})();36const puppeteer = require('puppeteer');37(async () => {38  const browser = await puppeteer.launch();39  const page = await browser.newPage();40  const handle = await page.evaluateHandle(() => document.body);

Using AI Code Generation

1const puppeteer = require('puppeteer');2const fs = require('fs');3(async () => {4  const browser = await puppeteer.launch({ headless: false });5  const page = await browser.newPage();6  const aHandle = await page.evaluateHandle(() => document.body);7  const bHandle = await page.evaluateHandle(body => body, aHandle);8  const cHandle = await page.evaluateHandle(body => body, bHandle);9  const dHandle = await page.evaluateHandle(body => body, cHandle);10  const eHandle = await page.evaluateHandle(body => body, dHandle);11  const fHandle = await page.evaluateHandle(body => body, eHandle);12  const gHandle = await page.evaluateHandle(body => body, fHandle);13  const hHandle = await page.evaluateHandle(body => body, gHandle);14  const iHandle = await page.evaluateHandle(body => body, hHandle);15  const jHandle = await page.evaluateHandle(body => body, iHandle);16  const kHandle = await page.evaluateHandle(body => body, jHandle);17  const lHandle = await page.evaluateHandle(body => body, kHandle);18  const mHandle = await page.evaluateHandle(body => body, lHandle);19  const nHandle = await page.evaluateHandle(body => body, mHandle);20  const oHandle = await page.evaluateHandle(body => body, nHandle);21  const pHandle = await page.evaluateHandle(body => body, oHandle);

Using AI Code Generation

1const puppeteer = require('puppeteer');2(async () => {3  const browser = await puppeteer.launch();4  const page = await browser.newPage();5  const element = await page.$('body');6  const handle = await element.asElement().createJSHandle();7  console.log(await handle.jsonValue());8  await browser.close();9})();10const puppeteer = require('puppeteer');11(async () => {12  const browser = await puppeteer.launch();13  const page = await browser.newPage();14  const element = await page.$('body');15  const handle = await element.asElement().evaluateHandle(() => document.body);16  console.log(await handle.jsonValue());17  await browser.close();18})();19const puppeteer = require('puppeteer');20(async () => {21  const browser = await puppeteer.launch();22  const page = await browser.newPage();23  const element = await page.$('body');24  const handle = await element.asElement().getProperty('innerHTML');25  console.log(await handle.jsonValue());26  await browser.close();27})();28const puppeteer = require('puppeteer');29(async () => {30  const browser = await puppeteer.launch();31  const page = await browser.newPage();32  const element = await page.$('body');33  const handle = await element.asElement().evaluate(element => element.innerHTML);34  console.log(handle);35  await browser.close();36})();37const puppeteer = require('puppeteer');38(async () => {39  const browser = await puppeteer.launch();40  const page = await browser.newPage();41  const handle = await page.$$eval('body', element => element[0].innerHTML);42  console.log(handle);43  await browser.close();44})();

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