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How to use waitForSelectorTask method in Playwright Internal

Best JavaScript code snippet using playwright-internal

frames.js

Source:frames.js

...573          frame,574          info575        } = selectorInFrame;576        const actualScope = this === frame ? scope : undefined;577        const task = dom.waitForSelectorTask(info, state, options.omitReturnValue, actualScope);578        const result = actualScope ? await frame._runWaitForSelectorTaskOnce(progress, (0, _selectorParser.stringifySelector)(info.parsed), info.world, task) : await frame._scheduleRerunnableHandleTask(progress, info.world, task);579        if (!result.asElement()) {580          result.dispose();581          return null;582        }583        if (options.__testHookBeforeAdoptNode) await options.__testHookBeforeAdoptNode();584        const handle = result.asElement();585        try {586          return await handle._adoptTo(await frame._mainContext());587        } catch (e) {588          return continuePolling;589        }590      }, scope);591    }, this._page._timeoutSettings.timeout(options));592  }593  async dispatchEvent(metadata, selector, type, eventInit = {}, options = {}) {594    await this._scheduleRerunnableTask(metadata, selector, (progress, element, data) => {595      progress.injectedScript.dispatchEvent(element, data.type, data.eventInit);596    }, {597      type,598      eventInit599    }, {600      mainWorld: true,601      ...options602    });603    await this._page._doSlowMo();604  }605  async evalOnSelectorAndWaitForSignals(selector, strict, expression, isFunction, arg) {606    const pair = await this.resolveFrameForSelectorNoWait(selector, {607      strict608    });609    const handle = pair ? await this._page.selectors.query(pair.frame, pair.info) : null;610    if (!handle) throw new Error(`Error: failed to find element matching selector "${selector}"`);611    const result = await handle.evaluateExpressionAndWaitForSignals(expression, isFunction, true, arg);612    handle.dispose();613    return result;614  }615  async evalOnSelectorAllAndWaitForSignals(selector, expression, isFunction, arg) {616    const pair = await this.resolveFrameForSelectorNoWait(selector, {});617    if (!pair) throw new Error(`Error: failed to find frame for selector "${selector}"`);618    const arrayHandle = await this._page.selectors._queryArrayInMainWorld(pair.frame, pair.info);619    const result = await arrayHandle.evaluateExpressionAndWaitForSignals(expression, isFunction, true, arg);620    arrayHandle.dispose();621    return result;622  }623  async querySelectorAll(selector) {624    const pair = await this.resolveFrameForSelectorNoWait(selector, {});625    if (!pair) return [];626    return this._page.selectors._queryAll(pair.frame, pair.info, undefined, true627    /* adoptToMain */628    );629  }630  async queryCount(selector) {631    const pair = await this.resolveFrameForSelectorNoWait(selector);632    if (!pair) throw new Error(`Error: failed to find frame for selector "${selector}"`);633    return await this._page.selectors._queryCount(pair.frame, pair.info);634  }635  async content() {636    try {637      const context = await this._utilityContext();638      return await context.evaluate(() => {639        let retVal = '';640        if (document.doctype) retVal = new XMLSerializer().serializeToString(document.doctype);641        if (document.documentElement) retVal += document.documentElement.outerHTML;642        return retVal;643      });644    } catch (e) {645      if (js.isJavaScriptErrorInEvaluate(e) || (0, _protocolError.isSessionClosedError)(e)) throw e;646      throw new Error(`Unable to retrieve content because the page is navigating and changing the content.`);647    }648  }649  async setContent(metadata, html, options = {}) {650    const controller = new _progress.ProgressController(metadata, this);651    return controller.run(progress => this.raceNavigationAction(async () => {652      const waitUntil = options.waitUntil === undefined ? 'load' : options.waitUntil;653      progress.log(`setting frame content, waiting until "${waitUntil}"`);654      const tag = `--playwright--set--content--${this._id}--${++this._setContentCounter}--`;655      const context = await this._utilityContext();656      const lifecyclePromise = new Promise((resolve, reject) => {657        this._page._frameManager._consoleMessageTags.set(tag, () => {658          // Clear lifecycle right after document.open() - see 'tag' below.659          this._onClearLifecycle();660          this._waitForLoadState(progress, waitUntil).then(resolve).catch(reject);661        });662      });663      const contentPromise = context.evaluate(({664        html,665        tag666      }) => {667        window.stop();668        document.open();669        console.debug(tag); // eslint-disable-line no-console670        document.write(html);671        document.close();672      }, {673        html,674        tag675      });676      await Promise.all([contentPromise, lifecyclePromise]);677      await this._page._doSlowMo();678    }), this._page._timeoutSettings.navigationTimeout(options));679  }680  name() {681    return this._name || '';682  }683  url() {684    return this._url;685  }686  parentFrame() {687    return this._parentFrame;688  }689  childFrames() {690    return Array.from(this._childFrames);691  }692  async addScriptTag(params) {693    const {694      url = null,695      content = null,696      type = ''697    } = params;698    if (!url && !content) throw new Error('Provide an object with a `url`, `path` or `content` property');699    const context = await this._mainContext();700    return this._raceWithCSPError(async () => {701      if (url !== null) return (await context.evaluateHandle(addScriptUrl, {702        url,703        type704      })).asElement();705      const result = (await context.evaluateHandle(addScriptContent, {706        content: content,707        type708      })).asElement(); // Another round trip to the browser to ensure that we receive CSP error messages709      // (if any) logged asynchronously in a separate task on the content main thread.710      if (this._page._delegate.cspErrorsAsynchronousForInlineScipts) await context.evaluate(() => true);711      return result;712    });713    async function addScriptUrl(params) {714      const script = document.createElement('script');715      script.src = params.url;716      if (params.type) script.type = params.type;717      const promise = new Promise((res, rej) => {718        script.onload = res;719        script.onerror = e => rej(typeof e === 'string' ? new Error(e) : new Error(`Failed to load script at ${script.src}`));720      });721      document.head.appendChild(script);722      await promise;723      return script;724    }725    function addScriptContent(params) {726      const script = document.createElement('script');727      script.type = params.type || 'text/javascript';728      script.text = params.content;729      let error = null;730      script.onerror = e => error = e;731      document.head.appendChild(script);732      if (error) throw error;733      return script;734    }735  }736  async addStyleTag(params) {737    const {738      url = null,739      content = null740    } = params;741    if (!url && !content) throw new Error('Provide an object with a `url`, `path` or `content` property');742    const context = await this._mainContext();743    return this._raceWithCSPError(async () => {744      if (url !== null) return (await context.evaluateHandle(addStyleUrl, url)).asElement();745      return (await context.evaluateHandle(addStyleContent, content)).asElement();746    });747    async function addStyleUrl(url) {748      const link = document.createElement('link');749      link.rel = 'stylesheet';750      link.href = url;751      const promise = new Promise((res, rej) => {752        link.onload = res;753        link.onerror = rej;754      });755      document.head.appendChild(link);756      await promise;757      return link;758    }759    async function addStyleContent(content) {760      const style = document.createElement('style');761      style.type = 'text/css';762      style.appendChild(document.createTextNode(content));763      const promise = new Promise((res, rej) => {764        style.onload = res;765        style.onerror = rej;766      });767      document.head.appendChild(style);768      await promise;769      return style;770    }771  }772  async _raceWithCSPError(func) {773    const listeners = [];774    let result;775    let error;776    let cspMessage;777    const actionPromise = func().then(r => result = r).catch(e => error = e);778    const errorPromise = new Promise(resolve => {779      listeners.push(_eventsHelper.eventsHelper.addEventListener(this._page, _page.Page.Events.Console, message => {780        if (message.type() === 'error' && message.text().includes('Content Security Policy')) {781          cspMessage = message;782          resolve();783        }784      }));785    });786    await Promise.race([actionPromise, errorPromise]);787    _eventsHelper.eventsHelper.removeEventListeners(listeners);788    if (cspMessage) throw new Error(cspMessage.text());789    if (error) throw error;790    return result;791  }792  async retryWithProgress(progress, selector, options, action, scope) {793    const continuePolling = Symbol('continuePolling');794    while (progress.isRunning()) {795      let selectorInFrame;796      if (options.omitAttached) {797        selectorInFrame = await this.resolveFrameForSelectorNoWait(selector, options, scope);798      } else {799        selectorInFrame = await this._resolveFrameForSelector(progress, selector, options, scope);800        if (!selectorInFrame) {801          // Missing content frame.802          await new Promise(f => setTimeout(f, 100));803          continue;804        }805      }806      try {807        const result = await action(selectorInFrame, continuePolling);808        if (result === continuePolling) continue;809        return result;810      } catch (e) {811        var _selectorInFrame;812        // Always fail on JavaScript errors or when the main connection is closed.813        if (js.isJavaScriptErrorInEvaluate(e) || (0, _protocolError.isSessionClosedError)(e)) throw e; // Certain error opt-out of the retries, throw.814        if (dom.isNonRecoverableDOMError(e)) throw e; // If the call is made on the detached frame - throw.815        if (this.isDetached()) throw e; // If there is scope, and scope is within the frame we use to select, assume context is destroyed and816        // operation is not recoverable.817        if (scope && scope._context.frame === ((_selectorInFrame = selectorInFrame) === null || _selectorInFrame === void 0 ? void 0 : _selectorInFrame.frame)) throw e; // Retry upon all other errors.818        continue;819      }820    }821    progress.throwIfAborted();822    return undefined;823  }824  async _retryWithProgressIfNotConnected(progress, selector, strict, action) {825    return this.retryWithProgress(progress, selector, {826      strict827    }, async (selectorInFrame, continuePolling) => {828      // We did not pass omitAttached, so selectorInFrame is not null.829      const {830        frame,831        info832      } = selectorInFrame; // Be careful, |this| can be different from |frame|.833      const task = dom.waitForSelectorTask(info, 'attached');834      progress.log(`waiting for selector "${selector}"`);835      const handle = await frame._scheduleRerunnableHandleTask(progress, info.world, task);836      const element = handle.asElement();837      try {838        const result = await action(element);839        if (result === 'error:notconnected') {840          progress.log('element was detached from the DOM, retrying');841          return continuePolling;842        }843        return result;844      } finally {845        element === null || element === void 0 ? void 0 : element.dispose();846      }847    });848  }849  async click(metadata, selector, options) {850    const controller = new _progress.ProgressController(metadata, this);851    return controller.run(async progress => {852      return dom.assertDone(await this._retryWithProgressIfNotConnected(progress, selector, options.strict, handle => handle._click(progress, options)));853    }, this._page._timeoutSettings.timeout(options));854  }855  async dblclick(metadata, selector, options = {}) {856    const controller = new _progress.ProgressController(metadata, this);857    return controller.run(async progress => {858      return dom.assertDone(await this._retryWithProgressIfNotConnected(progress, selector, options.strict, handle => handle._dblclick(progress, options)));859    }, this._page._timeoutSettings.timeout(options));860  }861  async dragAndDrop(metadata, source, target, options = {}) {862    const controller = new _progress.ProgressController(metadata, this);863    await controller.run(async progress => {864      dom.assertDone(await this._retryWithProgressIfNotConnected(progress, source, options.strict, async handle => {865        return handle._retryPointerAction(progress, 'move and down', false, async point => {866          await this._page.mouse.move(point.x, point.y);867          await this._page.mouse.down();868        }, { ...options,869          position: options.sourcePosition,870          timeout: progress.timeUntilDeadline()871        });872      }));873      dom.assertDone(await this._retryWithProgressIfNotConnected(progress, target, options.strict, async handle => {874        return handle._retryPointerAction(progress, 'move and up', false, async point => {875          await this._page.mouse.move(point.x, point.y);876          await this._page.mouse.up();877        }, { ...options,878          position: options.targetPosition,879          timeout: progress.timeUntilDeadline()880        });881      }));882    }, this._page._timeoutSettings.timeout(options));883  }884  async tap(metadata, selector, options) {885    const controller = new _progress.ProgressController(metadata, this);886    return controller.run(async progress => {887      return dom.assertDone(await this._retryWithProgressIfNotConnected(progress, selector, options.strict, handle => handle._tap(progress, options)));888    }, this._page._timeoutSettings.timeout(options));889  }890  async fill(metadata, selector, value, options) {891    const controller = new _progress.ProgressController(metadata, this);892    return controller.run(async progress => {893      return dom.assertDone(await this._retryWithProgressIfNotConnected(progress, selector, options.strict, handle => handle._fill(progress, value, options)));894    }, this._page._timeoutSettings.timeout(options));895  }896  async focus(metadata, selector, options = {}) {897    const controller = new _progress.ProgressController(metadata, this);898    await controller.run(async progress => {899      dom.assertDone(await this._retryWithProgressIfNotConnected(progress, selector, options.strict, handle => handle._focus(progress)));900      await this._page._doSlowMo();901    }, this._page._timeoutSettings.timeout(options));902  }903  async textContent(metadata, selector, options = {}) {904    return this._scheduleRerunnableTask(metadata, selector, (progress, element) => element.textContent, undefined, options);905  }906  async innerText(metadata, selector, options = {}) {907    return this._scheduleRerunnableTask(metadata, selector, (progress, element) => {908      if (element.namespaceURI !== 'http://www.w3.org/1999/xhtml') throw progress.injectedScript.createStacklessError('Node is not an HTMLElement');909      return element.innerText;910    }, undefined, options);911  }912  async innerHTML(metadata, selector, options = {}) {913    return this._scheduleRerunnableTask(metadata, selector, (progress, element) => element.innerHTML, undefined, options);914  }915  async getAttribute(metadata, selector, name, options = {}) {916    return this._scheduleRerunnableTask(metadata, selector, (progress, element, data) => element.getAttribute(data.name), {917      name918    }, options);919  }920  async inputValue(metadata, selector, options = {}) {921    return this._scheduleRerunnableTask(metadata, selector, (progress, node) => {922      const element = progress.injectedScript.retarget(node, 'follow-label');923      if (!element || element.nodeName !== 'INPUT' && element.nodeName !== 'TEXTAREA' && element.nodeName !== 'SELECT') throw progress.injectedScript.createStacklessError('Node is not an <input>, <textarea> or <select> element');924      return element.value;925    }, undefined, options);926  }927  async highlight(selector) {928    const pair = await this.resolveFrameForSelectorNoWait(selector);929    if (!pair) return;930    const context = await this._utilityContext();931    const injectedScript = await context.injectedScript();932    return await injectedScript.evaluate((injected, {933      parsed934    }) => {935      return injected.highlight(parsed);936    }, {937      parsed: pair.info.parsed938    });939  }940  async hideHighlight() {941    const context = await this._utilityContext();942    const injectedScript = await context.injectedScript();943    return await injectedScript.evaluate(injected => {944      return injected.hideHighlight();945    });946  }947  async _elementState(metadata, selector, state, options = {}) {948    const result = await this._scheduleRerunnableTask(metadata, selector, (progress, element, data) => {949      const injected = progress.injectedScript;950      return injected.elementState(element, data.state);951    }, {952      state953    }, options);954    return dom.throwRetargetableDOMError(result);955  }956  async isVisible(metadata, selector, options = {}) {957    const controller = new _progress.ProgressController(metadata, this);958    return controller.run(async progress => {959      progress.log(`  checking visibility of "${selector}"`);960      const pair = await this.resolveFrameForSelectorNoWait(selector, options);961      if (!pair) return false;962      const element = await this._page.selectors.query(pair.frame, pair.info);963      return element ? await element.isVisible() : false;964    }, this._page._timeoutSettings.timeout({}));965  }966  async isHidden(metadata, selector, options = {}) {967    return !(await this.isVisible(metadata, selector, options));968  }969  async isDisabled(metadata, selector, options = {}) {970    return this._elementState(metadata, selector, 'disabled', options);971  }972  async isEnabled(metadata, selector, options = {}) {973    return this._elementState(metadata, selector, 'enabled', options);974  }975  async isEditable(metadata, selector, options = {}) {976    return this._elementState(metadata, selector, 'editable', options);977  }978  async isChecked(metadata, selector, options = {}) {979    return this._elementState(metadata, selector, 'checked', options);980  }981  async hover(metadata, selector, options = {}) {982    const controller = new _progress.ProgressController(metadata, this);983    return controller.run(async progress => {984      return dom.assertDone(await this._retryWithProgressIfNotConnected(progress, selector, options.strict, handle => handle._hover(progress, options)));985    }, this._page._timeoutSettings.timeout(options));986  }987  async selectOption(metadata, selector, elements, values, options = {}) {988    const controller = new _progress.ProgressController(metadata, this);989    return controller.run(async progress => {990      return await this._retryWithProgressIfNotConnected(progress, selector, options.strict, handle => handle._selectOption(progress, elements, values, options));991    }, this._page._timeoutSettings.timeout(options));992  }993  async setInputFiles(metadata, selector, files, options = {}) {994    const controller = new _progress.ProgressController(metadata, this);995    return controller.run(async progress => {996      return dom.assertDone(await this._retryWithProgressIfNotConnected(progress, selector, options.strict, handle => handle._setInputFiles(progress, files, options)));997    }, this._page._timeoutSettings.timeout(options));998  }999  async type(metadata, selector, text, options = {}) {1000    const controller = new _progress.ProgressController(metadata, this);1001    return controller.run(async progress => {1002      return dom.assertDone(await this._retryWithProgressIfNotConnected(progress, selector, options.strict, handle => handle._type(progress, text, options)));1003    }, this._page._timeoutSettings.timeout(options));1004  }1005  async press(metadata, selector, key, options = {}) {1006    const controller = new _progress.ProgressController(metadata, this);1007    return controller.run(async progress => {1008      return dom.assertDone(await this._retryWithProgressIfNotConnected(progress, selector, options.strict, handle => handle._press(progress, key, options)));1009    }, this._page._timeoutSettings.timeout(options));1010  }1011  async check(metadata, selector, options = {}) {1012    const controller = new _progress.ProgressController(metadata, this);1013    return controller.run(async progress => {1014      return dom.assertDone(await this._retryWithProgressIfNotConnected(progress, selector, options.strict, handle => handle._setChecked(progress, true, options)));1015    }, this._page._timeoutSettings.timeout(options));1016  }1017  async uncheck(metadata, selector, options = {}) {1018    const controller = new _progress.ProgressController(metadata, this);1019    return controller.run(async progress => {1020      return dom.assertDone(await this._retryWithProgressIfNotConnected(progress, selector, options.strict, handle => handle._setChecked(progress, false, options)));1021    }, this._page._timeoutSettings.timeout(options));1022  }1023  async waitForTimeout(metadata, timeout) {1024    const controller = new _progress.ProgressController(metadata, this);1025    return controller.run(async () => {1026      await new Promise(resolve => setTimeout(resolve, timeout));1027    });1028  }1029  async expect(metadata, selector, options) {1030    const controller = new _progress.ProgressController(metadata, this);1031    const isArray = options.expression === 'to.have.count' || options.expression.endsWith('.array');1032    const mainWorld = options.expression === 'to.have.property';1033    const timeout = this._page._timeoutSettings.timeout(options); // List all combinations that are satisfied with the detached node(s).1034    let omitAttached = false;1035    if (!options.isNot && options.expression === 'to.be.hidden') omitAttached = true;else if (options.isNot && options.expression === 'to.be.visible') omitAttached = true;else if (!options.isNot && options.expression === 'to.have.count' && options.expectedNumber === 0) omitAttached = true;else if (options.isNot && options.expression === 'to.have.count' && options.expectedNumber !== 0) omitAttached = true;else if (!options.isNot && options.expression.endsWith('.array') && options.expectedText.length === 0) omitAttached = true;else if (options.isNot && options.expression.endsWith('.array') && options.expectedText.length > 0) omitAttached = true;1036    return controller.run(async outerProgress => {1037      outerProgress.log(`${metadata.apiName}${timeout ? ` with timeout ${timeout}ms` : ''}`);1038      return await this._scheduleRerunnableTaskWithProgress(outerProgress, selector, (progress, element, options, elements) => {1039        let result;1040        if (options.isArray) {1041          result = progress.injectedScript.expectArray(elements, options);1042        } else {1043          if (!element) {1044            // expect(locator).toBeHidden() passes when there is no element.1045            if (!options.isNot && options.expression === 'to.be.hidden') return {1046              matches: true1047            }; // expect(locator).not.toBeVisible() passes when there is no element.1048            if (options.isNot && options.expression === 'to.be.visible') return {1049              matches: false1050            }; // When none of the above applies, keep waiting for the element.1051            return progress.continuePolling;1052          }1053          result = progress.injectedScript.expectSingleElement(progress, element, options);1054        }1055        if (result.matches === options.isNot) {1056          // Keep waiting in these cases:1057          // expect(locator).conditionThatDoesNotMatch1058          // expect(locator).not.conditionThatDoesMatch1059          progress.setIntermediateResult(result.received);1060          if (!Array.isArray(result.received)) progress.log(`  unexpected value "${result.received}"`);1061          return progress.continuePolling;1062        } // Reached the expected state!1063        return result;1064      }, { ...options,1065        isArray1066      }, {1067        strict: true,1068        querySelectorAll: isArray,1069        mainWorld,1070        omitAttached,1071        logScale: true,1072        ...options1073      });1074    }, timeout).catch(e => {1075      // Q: Why not throw upon isSessionClosedError(e) as in other places?1076      // A: We want user to receive a friendly message containing the last intermediate result.1077      if (js.isJavaScriptErrorInEvaluate(e) || (0, _selectorErrors.isInvalidSelectorError)(e)) throw e;1078      return {1079        received: controller.lastIntermediateResult(),1080        matches: options.isNot,1081        log: metadata.log1082      };1083    });1084  }1085  async _waitForFunctionExpression(metadata, expression, isFunction, arg, options, world = 'main') {1086    const controller = new _progress.ProgressController(metadata, this);1087    if (typeof options.pollingInterval === 'number') (0, _utils.assert)(options.pollingInterval > 0, 'Cannot poll with non-positive interval: ' + options.pollingInterval);1088    expression = js.normalizeEvaluationExpression(expression, isFunction);1089    const task = injectedScript => injectedScript.evaluateHandle((injectedScript, {1090      expression,1091      isFunction,1092      polling,1093      arg1094    }) => {1095      const predicate = arg => {1096        let result = self.eval(expression);1097        if (isFunction === true) {1098          result = result(arg);1099        } else if (isFunction === false) {1100          result = result;1101        } else {1102          // auto detect.1103          if (typeof result === 'function') result = result(arg);1104        }1105        return result;1106      };1107      if (typeof polling !== 'number') return injectedScript.pollRaf(progress => predicate(arg) || progress.continuePolling);1108      return injectedScript.pollInterval(polling, progress => predicate(arg) || progress.continuePolling);1109    }, {1110      expression,1111      isFunction,1112      polling: options.pollingInterval,1113      arg1114    });1115    return controller.run(progress => this._scheduleRerunnableHandleTask(progress, world, task), this._page._timeoutSettings.timeout(options));1116  }1117  async waitForFunctionValueInUtility(progress, pageFunction) {1118    const expression = `() => {1119      const result = (${pageFunction})();1120      if (!result)1121        return result;1122      return JSON.stringify(result);1123    }`;1124    const handle = await this._waitForFunctionExpression((0, _instrumentation.internalCallMetadata)(), expression, true, undefined, {1125      timeout: progress.timeUntilDeadline()1126    }, 'utility');1127    return JSON.parse(handle.rawValue());1128  }1129  async title() {1130    const context = await this._utilityContext();1131    return context.evaluate(() => document.title);1132  }1133  _onDetached() {1134    this._stopNetworkIdleTimer();1135    this._detached = true;1136    this._detachedCallback();1137    const error = new Error('Frame was detached');1138    for (const data of this._contextData.values()) {1139      if (data.context) data.context.contextDestroyed(error);1140      data.contextPromise.resolve(error);1141      for (const rerunnableTask of data.rerunnableTasks) rerunnableTask.terminate(error);1142    }1143    if (this._parentFrame) this._parentFrame._childFrames.delete(this);1144    this._parentFrame = null;1145  }1146  async _scheduleRerunnableTask(metadata, selector, body, taskData, options = {}) {1147    const controller = new _progress.ProgressController(metadata, this);1148    return controller.run(async progress => {1149      return await this._scheduleRerunnableTaskWithProgress(progress, selector, body, taskData, options);1150    }, this._page._timeoutSettings.timeout(options));1151  }1152  async _scheduleRerunnableTaskWithProgress(progress, selector, body, taskData, options = {}) {1153    const callbackText = body.toString();1154    return this.retryWithProgress(progress, selector, options, async selectorInFrame => {1155      // Be careful, |this| can be different from |frame|.1156      progress.log(`waiting for selector "${selector}"`);1157      const {1158        frame,1159        info1160      } = selectorInFrame || {1161        frame: this,1162        info: {1163          parsed: {1164            parts: [{1165              name: 'control',1166              body: 'return-empty',1167              source: 'control=return-empty'1168            }]1169          },1170          world: 'utility',1171          strict: !!options.strict1172        }1173      };1174      return await frame._scheduleRerunnableTaskInFrame(progress, info, callbackText, taskData, options);1175    });1176  }1177  async _scheduleRerunnableTaskInFrame(progress, info, callbackText, taskData, options) {1178    progress.throwIfAborted();1179    const data = this._contextData.get(options.mainWorld ? 'main' : info.world); // This potentially runs in a sub-frame.1180    {1181      const rerunnableTask = new RerunnableTask(data, progress, injectedScript => {1182        return injectedScript.evaluateHandle((injected, {1183          info,1184          taskData,1185          callbackText,1186          querySelectorAll,1187          logScale,1188          omitAttached,1189          snapshotName1190        }) => {1191          const callback = injected.eval(callbackText);1192          const poller = logScale ? injected.pollLogScale.bind(injected) : injected.pollRaf.bind(injected);1193          let markedElements = new Set();1194          return poller(progress => {1195            let element;1196            let elements = [];1197            if (querySelectorAll) {1198              elements = injected.querySelectorAll(info.parsed, document);1199              element = elements[0];1200              progress.logRepeating(`  selector resolved to ${elements.length} element${elements.length === 1 ? '' : 's'}`);1201            } else {1202              element = injected.querySelector(info.parsed, document, info.strict);1203              elements = element ? [element] : [];1204              if (element) progress.logRepeating(`  selector resolved to ${injected.previewNode(element)}`);1205            }1206            if (!element && !omitAttached) return progress.continuePolling;1207            if (snapshotName) {1208              const previouslyMarkedElements = markedElements;1209              markedElements = new Set(elements);1210              for (const e of previouslyMarkedElements) {1211                if (!markedElements.has(e)) e.removeAttribute('__playwright_target__');1212              }1213              for (const e of markedElements) {1214                if (!previouslyMarkedElements.has(e)) e.setAttribute('__playwright_target__', snapshotName);1215              }1216            }1217            return callback(progress, element, taskData, elements);1218          });1219        }, {1220          info,1221          taskData,1222          callbackText,1223          querySelectorAll: options.querySelectorAll,1224          logScale: options.logScale,1225          omitAttached: options.omitAttached,1226          snapshotName: progress.metadata.afterSnapshot1227        });1228      }, true);1229      if (this._detached) rerunnableTask.terminate(new Error('Frame got detached.'));1230      if (data.context) rerunnableTask.rerun(data.context);1231      return await rerunnableTask.promise;1232    }1233  }1234  _scheduleRerunnableHandleTask(progress, world, task) {1235    const data = this._contextData.get(world);1236    const rerunnableTask = new RerunnableTask(data, progress, task, false1237    /* returnByValue */1238    );1239    if (this._detached) rerunnableTask.terminate(new Error('waitForFunction failed: frame got detached.'));1240    if (data.context) rerunnableTask.rerun(data.context);1241    return rerunnableTask.handlePromise;1242  }1243  _setContext(world, context) {1244    const data = this._contextData.get(world);1245    data.context = context;1246    if (context) {1247      data.contextPromise.resolve(context);1248      for (const rerunnableTask of data.rerunnableTasks) rerunnableTask.rerun(context);1249    } else {1250      data.contextPromise = new _async.ManualPromise();1251    }1252  }1253  _contextCreated(world, context) {1254    const data = this._contextData.get(world); // In case of multiple sessions to the same target, there's a race between1255    // connections so we might end up creating multiple isolated worlds.1256    // We can use either.1257    if (data.context) {1258      data.context.contextDestroyed(new Error('Execution context was destroyed, most likely because of a navigation'));1259      this._setContext(world, null);1260    }1261    this._setContext(world, context);1262  }1263  _contextDestroyed(context) {1264    // Sometimes we get this after detach, in which case we should not reset1265    // our already destroyed contexts to something that will never resolve.1266    if (this._detached) return;1267    context.contextDestroyed(new Error('Execution context was destroyed, most likely because of a navigation'));1268    for (const [world, data] of this._contextData) {1269      if (data.context === context) this._setContext(world, null);1270    }1271  }1272  _startNetworkIdleTimer() {1273    (0, _utils.assert)(!this._networkIdleTimer); // We should not start a timer and report networkidle in detached frames.1274    // This happens at least in Firefox for child frames, where we may get requestFinished1275    // after the frame was detached - probably a race in the Firefox itself.1276    if (this._firedLifecycleEvents.has('networkidle') || this._detached) return;1277    this._networkIdleTimer = setTimeout(() => this._onLifecycleEvent('networkidle'), 500);1278  }1279  _stopNetworkIdleTimer() {1280    if (this._networkIdleTimer) clearTimeout(this._networkIdleTimer);1281    this._networkIdleTimer = undefined;1282  }1283  async extendInjectedScript(source, arg) {1284    const context = await this._context('main');1285    const injectedScriptHandle = await context.injectedScript();1286    return injectedScriptHandle.evaluateHandle((injectedScript, {1287      source,1288      arg1289    }) => {1290      return injectedScript.extend(source, arg);1291    }, {1292      source,1293      arg1294    });1295  }1296  async _resolveFrameForSelector(progress, selector, options, scope) {1297    const elementPath = [];1298    progress.cleanupWhenAborted(() => {1299      // Do not await here to avoid being blocked, either by stalled1300      // page (e.g. alert) or unresolved navigation in Chromium.1301      for (const element of elementPath) element.dispose();1302    });1303    let frame = this;1304    const frameChunks = (0, _selectorParser.splitSelectorByFrame)(selector);1305    for (let i = 0; i < frameChunks.length - 1 && progress.isRunning(); ++i) {1306      const info = this._page.parseSelector(frameChunks[i], options);1307      const task = dom.waitForSelectorTask(info, 'attached', false, i === 0 ? scope : undefined);1308      progress.log(`  waiting for frame "${(0, _selectorParser.stringifySelector)(frameChunks[i])}"`);1309      const handle = i === 0 && scope ? await frame._runWaitForSelectorTaskOnce(progress, (0, _selectorParser.stringifySelector)(info.parsed), info.world, task) : await frame._scheduleRerunnableHandleTask(progress, info.world, task);1310      const element = handle.asElement();1311      const isIframe = await element.isIframeElement();1312      if (isIframe === 'error:notconnected') return null; // retry1313      if (!isIframe) throw new Error(`Selector "${(0, _selectorParser.stringifySelector)(info.parsed)}" resolved to ${element.preview()}, <iframe> was expected`);1314      frame = await element.contentFrame();1315      element.dispose();1316      if (!frame) return null; // retry1317    }1318    return {1319      frame,1320      info: this._page.parseSelector(frameChunks[frameChunks.length - 1], options)1321    };...

dom.js

Source:dom.js

...1095      throw new Error(1096        `state: expected one of (attached|detached|visible|hidden)`1097      )1098    const info = this._page.parseSelector(selector, options)1099    const task = waitForSelectorTask(info, state, false, this)1100    const controller = new _progress.ProgressController(metadata, this)1101    return controller.run(async (progress) => {1102      progress.log(1103        `waiting for selector "${selector}"${1104          state === 'attached' ? '' : ' to be ' + state1105        }`1106      )1107      const context = await this._context.frame._context(info.world)1108      const injected = await context.injectedScript()1109      const pollHandler = new InjectedScriptPollHandler(1110        progress,1111        await task(injected)1112      )1113      const result = await pollHandler.finishHandle()1114      if (!result.asElement()) {1115        result.dispose()1116        return null1117      }1118      const handle = result.asElement()1119      return handle._adoptTo(await this._context.frame._mainContext())1120    }, this._page._timeoutSettings.timeout(options))1121  }1122  async _adoptTo(context) {1123    if (this._context !== context) {1124      const adopted = await this._page._delegate.adoptElementHandle(1125        this,1126        context1127      )1128      this.dispose()1129      return adopted1130    }1131    return this1132  }1133  async _waitForDisplayedAtStablePosition(progress, force, waitForEnabled) {1134    if (waitForEnabled)1135      progress.log(`  waiting for element to be visible, enabled and stable`)1136    else progress.log(`  waiting for element to be visible and stable`)1137    const result = await this.evaluatePoll(1138      progress,1139      ([injected, node, { waitForEnabled, force }]) => {1140        return injected.waitForElementStatesAndPerformAction(1141          node,1142          waitForEnabled1143            ? ['visible', 'stable', 'enabled']1144            : ['visible', 'stable'],1145          force,1146          () => 'done'1147        )1148      },1149      {1150        waitForEnabled,1151        force1152      }1153    )1154    if (result === 'error:notconnected') return result1155    if (waitForEnabled) progress.log('  element is visible, enabled and stable')1156    else progress.log('  element is visible and stable')1157    return result1158  }1159  async _checkHitTargetAt(point) {1160    const frame = await this.ownerFrame()1161    if (frame && frame.parentFrame()) {1162      const element = await frame.frameElement()1163      const box = await element.boundingBox()1164      if (!box) return 'error:notconnected' // Translate from viewport coordinates to frame coordinates.1165      point = {1166        x: point.x - box.x,1167        y: point.y - box.y1168      }1169    }1170    return this.evaluateInUtility(1171      ([injected, node, point]) => injected.checkHitTargetAt(node, point),1172      point1173    )1174  }1175} // Handles an InjectedScriptPoll running in injected script:1176// - streams logs into progress;1177// - cancels the poll when progress cancels.1178exports.ElementHandle = ElementHandle1179class InjectedScriptPollHandler {1180  constructor(progress, poll) {1181    this._progress = void 01182    this._poll = void 01183    this._progress = progress1184    this._poll = poll // Ensure we cancel the poll before progress aborts and returns:1185    //   - no unnecessary work in the page;1186    //   - no possible side effects after progress promsie rejects.1187    this._progress.cleanupWhenAborted(() => this.cancel())1188    this._streamLogs()1189  }1190  async _streamLogs() {1191    while (this._poll && this._progress.isRunning()) {1192      const log = await this._poll1193        .evaluate((poll) => poll.takeNextLogs())1194        .catch((e) => [])1195      if (!this._poll || !this._progress.isRunning()) return1196      for (const entry of log) this._progress.logEntry(entry)1197    }1198  }1199  async finishHandle() {1200    try {1201      const result = await this._poll.evaluateHandle((poll) => poll.run())1202      await this._finishInternal()1203      return result1204    } finally {1205      await this.cancel()1206    }1207  }1208  async finish() {1209    try {1210      const result = await this._poll.evaluate((poll) => poll.run())1211      await this._finishInternal()1212      return result1213    } finally {1214      await this.cancel()1215    }1216  }1217  async _finishInternal() {1218    if (!this._poll) return // Retrieve all the logs before continuing.1219    const log = await this._poll1220      .evaluate((poll) => poll.takeLastLogs())1221      .catch((e) => [])1222    for (const entry of log) this._progress.logEntry(entry)1223  }1224  async cancel() {1225    if (!this._poll) return1226    const copy = this._poll1227    this._poll = null1228    await copy.evaluate((p) => p.cancel()).catch((e) => {})1229    copy.dispose()1230  }1231}1232exports.InjectedScriptPollHandler = InjectedScriptPollHandler1233function throwRetargetableDOMError(result) {1234  if (result === 'error:notconnected')1235    throw new Error('Element is not attached to the DOM')1236  return result1237}1238function assertDone(result) {1239  // This function converts 'done' to void and ensures typescript catches unhandled errors.1240}1241function roundPoint(point) {1242  return {1243    x: ((point.x * 100) | 0) / 100,1244    y: ((point.y * 100) | 0) / 1001245  }1246}1247function compensateHalfIntegerRoundingError(point) {1248  // Firefox internally uses integer coordinates, so 8.5 is converted to 9 when clicking.1249  //1250  // This does not work nicely for small elements. For example, 1x1 square with corners1251  // (8;8) and (9;9) is targeted when clicking at (8;8) but not when clicking at (9;9).1252  // So, clicking at (8.5;8.5) will effectively click at (9;9) and miss the target.1253  //1254  // Therefore, we skew half-integer values from the interval (8.49, 8.51) towards1255  // (8.47, 8.49) that is rounded towards 8. This means clicking at (8.5;8.5) will1256  // be replaced with (8.48;8.48) and will effectively click at (8;8).1257  //1258  // Other browsers use float coordinates, so this change should not matter.1259  const remainderX = point.x - Math.floor(point.x)1260  if (remainderX > 0.49 && remainderX < 0.51) point.x -= 0.021261  const remainderY = point.y - Math.floor(point.y)1262  if (remainderY > 0.49 && remainderY < 0.51) point.y -= 0.021263}1264function waitForSelectorTask(selector, state, omitReturnValue, root) {1265  return (injectedScript) =>1266    injectedScript.evaluateHandle(1267      (injected, { parsed, strict, state, omitReturnValue, root }) => {1268        let lastElement1269        return injected.pollRaf((progress) => {1270          const elements = injected.querySelectorAll(parsed, root || document)1271          let element = elements[0]1272          const visible = element ? injected.isVisible(element) : false1273          if (lastElement !== element) {1274            lastElement = element1275            if (!element) {1276              progress.log(`  selector did not resolve to any element`)1277            } else {1278              if (elements.length > 1) {...

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  const element = await page.waitForSelectorTask('text=Get Started');7  await element.click();8  await browser.close();9})();10module.exports = {11  use: {12    viewport: { width: 1280, height: 720 },13  },14    {15      use: {16      },17    },18};19module.exports = {20  use: {21    viewport: { width: 1280, height: 720 },22  },23    {24      use: {25      },26    },27};28module.exports = {29  use: {30    viewport: { width: 1280, height: 720 },31  },32    {33      use: {34      },35    },36};37module.exports = {38  use: {39    viewport: { width: 1280, height: 720 },

Using AI Code Generation

1const playwright = require('playwright');2(async () => {3  const browser = await playwright['chromium'].launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.waitForSelector('text=Get Started');7  await browser.close();8})();9module.exports = {10  use: {11    viewport: { width: 1280, height: 720 },12  },13};

Using AI Code Generation

1const playwright = require('playwright');2const { waitForSelectorTask } = require('playwright/lib/server/supplements/recorder/recorderSupplement.js');3(async () => {4  const browser = await playwright['chromium'].launch({ headless: false });5  const context = await browser.newContext();6  const page = await context.newPage();7  await page.click('input[name="q"]');8  await waitForSelectorTask(page, 'input[name="q"]');9  await page.fill('input[name="q"]', 'Hello World!');10  await page.keyboard.press('Enter');11  await page.waitForSelector('text=Hello World!');12  await page.click('text=Hello World!');13  await page.waitForSelector('text=Hello World! - Google Search');14  await page.click('text=Hello World! - Google Search');15  await page.waitForSelector('text=Hello World! - Google Search');16  await page.click('text=Hello World! - Google Search');17  await page.waitForSelector('text=Hello World! - Google Search');18  await page.click('text=Hello World! - Google Search');19  await page.waitForSelector('text=Hello World! - Google Search');20  await page.click('text=Hello World! - Google Search');21  await page.waitForSelector('text=Hello World! - Google Search');22  await page.click('text=Hello World! - Google Search');23  await page.waitForSelector('text=Hello World! - Google Search');24  await page.click('text=Hello World! - Google Search');25  await page.waitForSelector('text=Hello World! - Google Search');26  await page.click('text=Hello World! - Google Search');27  await page.waitForSelector('text=Hello World! - Google Search');28  await page.click('text=Hello World! - Google Search');29  await page.waitForSelector('text=Hello World! - Google Search');30  await page.click('text=Hello World! - Google Search');31  await page.waitForSelector('text=Hello World! - Google Search');32  await page.click('text=Hello World! - Google Search');33  await page.waitForSelector('text=Hello World! - Google Search');34  await page.click('text=Hello World! - Google Search');35  await page.waitForSelector('text=Hello World! - Google Search');36  await page.click('text=Hello World! - Google Search');

Using AI Code Generation

1const { waitForSelectorTask } = require('@playwright/test/lib/server/frames');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch({ headless: false });5  const context = await browser.newContext();6  const page = await context.newPage();7  await waitForSelectorTask(page.mainFrame(), 'input[name="btnK"]', { state: 'visible', timeout: 3000 });8  await page.screenshot({ path: 'google.png' });9  await browser.close();10})();

Using AI Code Generation

1const { waitForSelectorTask } = require('playwright/lib/server/frames');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  await waitForSelectorTask(page.mainFrame(), 'button', {8  });9  await page.click('button');10  await browser.close();11})();12const { chromium } = require('playwright');13describe('TodoMVC', () => {14  it('should add a todo', async () => {15    const browser = await chromium.launch();16    const context = await browser.newContext();17    const page = await context.newPage();18    await page.waitForSelector('button');19    await page.click('button');20    await browser.close();21  });22});23const { chromium } = require('playwright');24describe('TodoMVC', () => {25  it('should add a todo', async () => {26    const browser = await chromium.launch();27    const context = await browser.newContext();28    const page = await context.newPage();29    await page.waitForSelector('button');30    await page.click('button');31    await browser.close();32  });33});34const { chromium } = require('playwright');35describe('TodoMVC', () => {36  it('should add a todo', async () => {37    const browser = await chromium.launch();38    const context = await browser.newContext();39    const page = await context.newPage();40    await page.waitForSelector('button');41    await page.click('

Using AI Code Generation

1const { waitForSelectorTask } = require('playwright/lib/protocol/protocol');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  await page.click('input[name="q"]');8  await page.type('input[name="q"]', 'playwright');9  await page.keyboard.press('Enter');10  await page.waitForSelector('text=Playwright');11  await page.waitForTimeout(1000);12  await page.screenshot({ path: 'example.png' });13  await browser.close();14})();15const { waitForSelectorTask } = require('playwright/lib/protocol/protocol');16const { chromium } = require('playwright');17(async () => {18  const browser = await chromium.launch();19  const context = await browser.newContext();20  const page = await context.newPage();21  await page.click('input[name="q"]');22  await page.type('input[name="q"]', 'playwright');23  await page.keyboard.press('Enter');24  await page.waitForSelector('text=Playwright', { waitUntil: 'domcontentloaded' });25  await page.waitForTimeout(1000);26  await page.screenshot({ path: 'example.png' });27  await browser.close();28})();29const { waitForSelectorTask } = require('playwright/lib/protocol/protocol');30const { chromium } = require('playwright');31(async () => {32  const browser = await chromium.launch();33  const context = await browser.newContext();34  const page = await context.newPage();35  await page.click('input[name="q"]');36  await page.type('input[name="q"]', 'playwright');37  await page.keyboard.press('Enter');38  await page.waitForSelector('text=Playwright', { timeout: 5000 });39  await page.waitForTimeout(1000);40  await page.screenshot({ path: 'example.png' });41  await browser.close();42})();43const { waitForSelectorTask } = require('playwright

Using AI Code Generation

1const { waitForSelectorTask } = require('playwright/lib/server/supplements/recorder/recorderSupplement');2const { chromium } = require('playwright');3(async () => {4  const browser = await chromium.launch();5  const page = await browser.newPage();6  await waitForSelectorTask(page, 'css=div');7  await browser.close();8})();9const { waitForSelectorTask } = require('playwright/lib/server/supplements/recorder/recorderSupplement');10const { chromium } = require('playwright');11(async () => {12  const browser = await chromium.launch();13  const page = await browser.newPage();14  await waitForSelectorTask(page, 'css=div');15  await browser.close();16})();

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.waitForSelectorTask('text=Get started');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  await page.waitForSelectorTask('text=Get started', { state: 'hidden' });15  await browser.close();16})();

Using AI Code Generation

1const { waitForSelectorTask } = require('playwright-core/lib/server/supplements/recorder/recorderSupplement');2const { firefox } = require('playwright-core');3(async () => {4  const browser = await firefox.launch();5  const page = await browser.newPage();6  await waitForSelectorTask(page, 'text=Example Domain');7  await page.screenshot({ path: 'example.png' });8  await browser.close();9})();

Using AI Code Generation

1var { waitForSelectorTask } = require('playwright/lib/server/page');2(async () => {3  await waitForSelectorTask({4  });5})();6const { test, expect } = require('@playwright/test');7test('my test', async ({ page }) => {8  await page.waitForSelector('text=Get Started');9  const title = await page.innerText('h1');10  expect(title).toBe('Playwright');11});12const { test, expect } = require('@playwright/test');13test('my test', async ({ page }) => {14  await page.waitForSelector('text=Get Started');15  const title = await page.innerText('h1');16  expect(title).toBe('Playwright');17});

Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
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.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.