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How to use frameSnapshotStreamer method in Playwright Internal

Best JavaScript code snippet using playwright-internal

snapshotterInjected.js

Source:snapshotterInjected.js

...17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.18 * See the License for the specific language governing permissions and19 * limitations under the License.20 */21function frameSnapshotStreamer(snapshotStreamer) {22  // Communication with Playwright.23  if (window[snapshotStreamer]) return; // Attributes present in the snapshot.24  const kShadowAttribute = '__playwright_shadow_root_';25  const kScrollTopAttribute = '__playwright_scroll_top_';26  const kScrollLeftAttribute = '__playwright_scroll_left_';27  const kStyleSheetAttribute = '__playwright_style_sheet_';28  const kBlobUrlPrefix = 'http://playwright.bloburl/#'; // Symbols for our own info on Nodes/StyleSheets.29  const kSnapshotFrameId = Symbol('__playwright_snapshot_frameid_');30  const kCachedData = Symbol('__playwright_snapshot_cache_');31  const kEndOfList = Symbol('__playwright_end_of_list_');32  function resetCachedData(obj) {33    delete obj[kCachedData];34  }35  function ensureCachedData(obj) {...

snapshotter.js

Source:snapshotter.js

1"use strict";2Object.defineProperty(exports, "__esModule", {3  value: true4});5exports.Snapshotter = void 0;6var _browserContext = require("../../browserContext");7var _page = require("../../page");8var _eventsHelper = require("../../../utils/eventsHelper");9var _debugLogger = require("../../../utils/debugLogger");10var _snapshotterInjected = require("./snapshotterInjected");11var _utils = require("../../../utils/utils");12var mime = _interopRequireWildcard(require("mime"));13function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }14function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }15/**16 * Copyright (c) Microsoft Corporation.17 *18 * Licensed under the Apache License, Version 2.0 (the "License");19 * you may not use this file except in compliance with the License.20 * You may obtain a copy of the License at21 *22 *     http://www.apache.org/licenses/LICENSE-2.023 *24 * Unless required by applicable law or agreed to in writing, software25 * distributed under the License is distributed on an "AS IS" BASIS,26 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.27 * See the License for the specific language governing permissions and28 * limitations under the License.29 */30class Snapshotter {31  constructor(context, delegate) {32    this._context = void 0;33    this._delegate = void 0;34    this._eventListeners = [];35    this._snapshotStreamer = void 0;36    this._initialized = false;37    this._started = false;38    this._context = context;39    this._delegate = delegate;40    const guid = (0, _utils.createGuid)();41    this._snapshotStreamer = '__playwright_snapshot_streamer_' + guid;42  }43  started() {44    return this._started;45  }46  async start() {47    this._started = true;48    if (!this._initialized) {49      this._initialized = true;50      await this._initialize();51    }52    await this.reset();53  }54  async reset() {55    if (this._started) await this._runInAllFrames(`window["${this._snapshotStreamer}"].reset()`);56  }57  async stop() {58    this._started = false;59  }60  async _initialize() {61    for (const page of this._context.pages()) this._onPage(page);62    this._eventListeners = [_eventsHelper.eventsHelper.addEventListener(this._context, _browserContext.BrowserContext.Events.Page, this._onPage.bind(this))];63    const initScript = `(${_snapshotterInjected.frameSnapshotStreamer})("${this._snapshotStreamer}")`;64    await this._context._doAddInitScript(initScript);65    await this._runInAllFrames(initScript);66  }67  async _runInAllFrames(expression) {68    const frames = [];69    for (const page of this._context.pages()) frames.push(...page.frames());70    await Promise.all(frames.map(frame => {71      return frame.nonStallingRawEvaluateInExistingMainContext(expression).catch(e => _debugLogger.debugLogger.log('error', e));72    }));73  }74  dispose() {75    _eventsHelper.eventsHelper.removeEventListeners(this._eventListeners);76  }77  async captureSnapshot(page, snapshotName, element) {78    // Prepare expression synchronously.79    const expression = `window["${this._snapshotStreamer}"].captureSnapshot(${JSON.stringify(snapshotName)})`; // In a best-effort manner, without waiting for it, mark target element.80    element === null || element === void 0 ? void 0 : element.callFunctionNoReply((element, snapshotName) => {81      element.setAttribute('__playwright_target__', snapshotName);82    }, snapshotName); // In each frame, in a non-stalling manner, capture the snapshots.83    const snapshots = page.frames().map(async frame => {84      const data = await frame.nonStallingRawEvaluateInExistingMainContext(expression).catch(e => _debugLogger.debugLogger.log('error', e)); // Something went wrong -> bail out, our snapshots are best-efforty.85      if (!data || !this._started) return;86      const snapshot = {87        snapshotName,88        pageId: page.guid,89        frameId: frame.guid,90        frameUrl: data.url,91        doctype: data.doctype,92        html: data.html,93        viewport: data.viewport,94        timestamp: (0, _utils.monotonicTime)(),95        collectionTime: data.collectionTime,96        resourceOverrides: [],97        isMainFrame: page.mainFrame() === frame98      };99      for (const {100        url,101        content,102        contentType103      } of data.resourceOverrides) {104        if (typeof content === 'string') {105          const buffer = Buffer.from(content);106          const sha1 = (0, _utils.calculateSha1)(buffer) + '.' + (mime.getExtension(contentType) || 'dat');107          this._delegate.onSnapshotterBlob({108            sha1,109            buffer110          });111          snapshot.resourceOverrides.push({112            url,113            sha1114          });115        } else {116          snapshot.resourceOverrides.push({117            url,118            ref: content119          });120        }121      }122      this._delegate.onFrameSnapshot(snapshot);123    });124    await Promise.all(snapshots);125  }126  _onPage(page) {127    // Annotate frame hierarchy so that snapshots could include frame ids.128    for (const frame of page.frames()) this._annotateFrameHierarchy(frame);129    this._eventListeners.push(_eventsHelper.eventsHelper.addEventListener(page, _page.Page.Events.FrameAttached, frame => this._annotateFrameHierarchy(frame)));130  }131  async _annotateFrameHierarchy(frame) {132    try {133      const frameElement = await frame.frameElement();134      const parent = frame.parentFrame();135      if (!parent) return;136      const context = await parent._mainContext();137      await (context === null || context === void 0 ? void 0 : context.evaluate(({138        snapshotStreamer,139        frameElement,140        frameId141      }) => {142        window[snapshotStreamer].markIframe(frameElement, frameId);143      }, {144        snapshotStreamer: this._snapshotStreamer,145        frameElement,146        frameId: frame.guid147      }));148      frameElement.dispose();149    } catch (e) {}150  }151}...

Using AI Code Generation

1const pw = require('playwright');2(async () => {3  const browser = await pw.chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  const stream = await page.frameSnapshotStreamer();7  const chunks = [];8  for await (const chunk of stream) {9    chunks.push(chunk);10  }11  console.log(Buffer.concat(chunks).toString());12  await browser.close();13})();

Using AI Code Generation

1const playwright = require("playwright");2const fs = require("fs");3(async () => {4  const browser = await playwright.chromium.launch({ headless: false });5  const context = await browser.newContext();6  const page = await context.newPage();7  const frame = page.mainFrame();8  const frameSnapshotStreamer = frame._frameSnapshotStreamer();9  frameSnapshotStreamer.on("snapshot", async (snapshot) => {10    const snapshotBuffer = await snapshot.buffer();11    fs.writeFileSync("snapshot.png", snapshotBuffer);12  });13  await frameSnapshotStreamer.start();14  await frameSnapshotStreamer.stop();15  await browser.close();16})();

Using AI Code Generation

1const playwright = require('playwright');2const { frameSnapshotStreamer } = require('playwright/lib/server/snapshotter/snapshotter');3const fs = require('fs');4(async () => {5  const browser = await playwright.chromium.launch({ headless: false });6  const context = await browser.newContext();7  const page = await context.newPage();8  const snapshot = await frameSnapshotStreamer(page.mainFrame());9  const file = fs.createWriteStream('test.png');10  snapshot.image.pipe(file);11  console.log('Snapshot saved to test.png');12  await browser.close();13})();

Using AI Code Generation

1const fs = require('fs');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 snapshot = await page.frameSnapshotStreamer({ path: 'snapshot.json' });8  const stream = fs.createWriteStream('snapshot.json');9  await snapshot.pipe(stream);10  await browser.close();11})();12const fs = require('fs');13const puppeteer = require('puppeteer');14(async () => {15  const browser = await puppeteer.launch();16  const page = await browser.newPage();17  const snapshot = fs.readFileSync('snapshot.json', 'utf8');18  await page.setContent(snapshot);19  await page.screenshot({ path: 'screenshot.png' });20  await browser.close();21})();22const fs = require('fs');23const puppeteer = require('puppeteer');24(async () => {25  const browser = await puppeteer.launch();26  const page = await browser.newPage();27  const snapshot = fs.readFileSync('snapshot.json', 'utf8');28  await page.setContent(snapshot);29  await page.pdf({ path: 'page.pdf' });30  await browser.close();

Using AI Code Generation

1const { frameSnapshotStreamer } = require('playwright/lib/server/snapshot/snapshotStreamer');2const { createReadStream } = require('fs');3(async () => {4  const snapshot = await frameSnapshotStreamer.createSnapshot(createReadStream('snapshot.json'));5  console.log(snapshot);6})();7{8    {9        {10        }11    }12}13const { test, expect } = require('@playwright/test');14test('my test', async ({ page }) => {15  const snapshot = await frameSnapshotStreamer.createSnapshot(createReadStream('snapshot.json'));16  await snapshot.apply(page);17  expect(page.locator('img')).toBeVisible();18});19const { frameSnapshotStreamer } = require('playwright/lib/server/snapshot/snapshotStreamer');20const { createReadStream } = require('fs');21(async () => {22  const snapshot = await frameSnapshotStreamer.createSnapshot(page);23  console.log(snapshot);24})();25{26    {27        {

Using AI Code Generation

1import { frameSnapshotStreamer } from 'playwright/lib/server/snapshot/snapshotStreamer';2const snapshotStreamer = frameSnapshotStreamer(page.mainFrame());3await snapshotStreamer.start();4await page.screenshot({ path: 'test.png' });5await snapshotStreamer.stop();6await snapshotStreamer.save('test.trace');7import { traceViewer } from 'playwright/lib/server/trace/viewer/traceViewer';8const trace = await traceViewer.load('test.trace');9const snapshot = await trace.snapshotAtTime(0);10await snapshot.writeScreenshot('test.png');11await trace.close();12import { traceViewer } from 'playwright/lib/server/trace/viewer/traceViewer';13const trace = await traceViewer.load('test.trace');14const snapshot = await trace.snapshotAtTime(0);15await snapshot.writeSnapshot('test.json');16await trace.close();17import { traceViewer } from 'playwright/lib/server/trace/viewer/traceViewer';18const trace = await traceViewer.load('test.trace');19const snapshot = await trace.snapshotAtTime(0);20await snapshot.writeSnapshot('test.json');21await trace.close();22import { traceViewer } from 'playwright/lib/server/trace/viewer/traceViewer';23const trace = await traceViewer.load('test.trace');24const snapshot = await trace.snapshotAtTime(0);25await snapshot.writeSnapshot('test.json');26await trace.close();27import { traceViewer } from 'playwright/lib/server/trace/viewer/traceViewer';28const trace = await traceViewer.load('test.trace');29const snapshot = await trace.snapshotAtTime(0);30await snapshot.writeSnapshot('test.json');31await trace.close();32import { traceViewer } from 'playwright/lib/server/trace/viewer/traceViewer';33const trace = await traceViewer.load('test.trace');34const snapshot = await trace.snapshotAtTime(0);35await snapshot.writeSnapshot('test.json');36await trace.close();

Using AI Code Generation

1const playwright = require("playwright");2const { frameSnapshotStreamer } = require("playwright/lib/server/snapshot/snapshotStreamer");3const fs = require("fs");4(async () => {5  const browser = await playwright.chromium.launch();6  const context = await browser.newContext();7  const page = await context.newPage();8  const frame = page.mainFrame();9  const snapshot = await frameSnapshotStreamer(frame);10  fs.writeFileSync("snapshot.png", snapshot);11  await browser.close();12})();13@kylecorry31 You can use page.evaluate() to scroll to the content you want to take a screenshot of14@kylecorry31 You can use page.evaluate() to scroll to the content you want to take a screenshot of. You can use page.evaluate() to scroll to the content you want to take a screenshot of15@kylecorry31 You can use page.evaluate() to scroll to the content you want to take a screenshot of. You can use page.evaluate() to scroll to the content you want to take a screenshot of. You can use page.evaluate() to scroll to the content you want to take a screenshot of16@kylecorry31 You can use page.evaluate() to scroll to the content you want to take a screenshot of. You can use page.evaluate() to scroll to the content you want

Playwright tutorial

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