How to use observe method in Playwright Internal

Best JavaScript code snippet using playwright-internal

test_Preferences.js

Source:test_Preferences.js Github

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...156});157add_test(function test_observe_prefs_function() {158 let observed = false;159 let observer = function() { observed = !observed };160 Preferences.observe("test_observe_prefs_function", observer);161 Preferences.set("test_observe_prefs_function.subpref", "something");162 do_check_false(observed);163 Preferences.set("test_observe_prefs_function", "something");164 do_check_true(observed);165 Preferences.ignore("test_observe_prefs_function", observer);166 Preferences.set("test_observe_prefs_function", "something else");167 do_check_true(observed);168 // Clean up.169 Preferences.reset("test_observe_prefs_function");170 Preferences.reset("test_observe_prefs_function.subpref");171 run_next_test();172});173add_test(function test_observe_prefs_object() {174 let observer = {175 observed: false,176 observe() {177 this.observed = !this.observed;178 }179 };180 Preferences.observe("test_observe_prefs_object", observer.observe, observer);181 Preferences.set("test_observe_prefs_object.subpref", "something");182 do_check_false(observer.observed);183 Preferences.set("test_observe_prefs_object", "something");184 do_check_true(observer.observed);185 Preferences.ignore("test_observe_prefs_object", observer.observe, observer);186 Preferences.set("test_observe_prefs_object", "something else");187 do_check_true(observer.observed);188 // Clean up.189 Preferences.reset("test_observe_prefs_object");190 Preferences.reset("test_observe_prefs_object.subpref");191 run_next_test();192});193add_test(function test_observe_prefs_nsIObserver() {194 let observer = {195 observed: false,196 observe(subject, topic, data) {197 this.observed = !this.observed;198 do_check_true(subject instanceof Ci.nsIPrefBranch);199 do_check_eq(topic, "nsPref:changed");200 do_check_eq(data, "test_observe_prefs_nsIObserver");201 }202 };203 Preferences.observe("test_observe_prefs_nsIObserver", observer);204 Preferences.set("test_observe_prefs_nsIObserver.subpref", "something");205 Preferences.set("test_observe_prefs_nsIObserver", "something");206 do_check_true(observer.observed);207 Preferences.ignore("test_observe_prefs_nsIObserver", observer);208 Preferences.set("test_observe_prefs_nsIObserver", "something else");209 do_check_true(observer.observed);210 // Clean up.211 Preferences.reset("test_observe_prefs_nsIObserver");212 Preferences.reset("test_observe_prefs_nsIObserver.subpref");213 run_next_test();214});215// This should not need to be said, but *DO NOT DISABLE THIS TEST*.216//217// Existing consumers of the observer API depend on the observer only218// being triggered for the exact preference they are observing. This is219// expecially true for consumers of the function callback variant which220// passes the preference's new value but not its name.221add_test(function test_observe_exact_pref() {222 let observed = false;223 let observer = function() { observed = !observed };224 Preferences.observe("test_observe_exact_pref", observer);225 Preferences.set("test_observe_exact_pref.sub-pref", "something");226 do_check_false(observed);227 // Clean up.228 Preferences.ignore("test_observe_exact_pref", observer);229 Preferences.reset("test_observe_exact_pref.sub-pref");230 run_next_test();231});232add_test(function test_observe_value_of_set_pref() {233 let observer = function(newVal) { do_check_eq(newVal, "something") };234 Preferences.observe("test_observe_value_of_set_pref", observer);235 Preferences.set("test_observe_value_of_set_pref.subpref", "somethingelse");236 Preferences.set("test_observe_value_of_set_pref", "something");237 // Clean up.238 Preferences.ignore("test_observe_value_of_set_pref", observer);239 Preferences.reset("test_observe_value_of_set_pref");240 Preferences.reset("test_observe_value_of_set_pref.subpref");241 run_next_test();242});243add_test(function test_observe_value_of_reset_pref() {244 let observer = function(newVal) { do_check_true(typeof newVal == "undefined") };245 Preferences.set("test_observe_value_of_reset_pref", "something");246 Preferences.observe("test_observe_value_of_reset_pref", observer);247 Preferences.reset("test_observe_value_of_reset_pref");248 // Clean up.249 Preferences.ignore("test_observe_value_of_reset_pref", observer);250 run_next_test();251});252add_test(function test_has_pref() {253 do_check_false(Preferences.has("test_has_pref"));254 Preferences.set("test_has_pref", "foo");255 do_check_true(Preferences.has("test_has_pref"));256 Preferences.set("test_has_pref.foo", "foo");257 Preferences.set("test_has_pref.bar", "bar");258 let [hasFoo, hasBar, hasBaz] = Preferences.has(["test_has_pref.foo",259 "test_has_pref.bar",260 "test_has_pref.baz"]);...

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observe.js

Source:observe.js Github

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1// XXX maybe move these into another ObserveHelpers package or something2// _CachingChangeObserver is an object which receives observeChanges callbacks3// and keeps a cache of the current cursor state up to date in self.docs. Users4// of this class should read the docs field but not modify it. You should pass5// the "applyChange" field as the callbacks to the underlying observeChanges6// call. Optionally, you can specify your own observeChanges callbacks which are7// invoked immediately before the docs field is updated; this object is made8// available as `this` to those callbacks.9LocalCollection._CachingChangeObserver = function (options) {10 var self = this;11 options = options || {};12 var orderedFromCallbacks = options.callbacks &&13 LocalCollection._observeChangesCallbacksAreOrdered(options.callbacks);14 if (_.has(options, 'ordered')) {15 self.ordered = options.ordered;16 if (options.callbacks && options.ordered !== orderedFromCallbacks)17 throw Error("ordered option doesn't match callbacks");18 } else if (options.callbacks) {19 self.ordered = orderedFromCallbacks;20 } else {21 throw Error("must provide ordered or callbacks");22 }23 var callbacks = options.callbacks || {};24 if (self.ordered) {25 self.docs = new OrderedDict(LocalCollection._idStringify);26 self.applyChange = {27 addedBefore: function (id, fields, before) {28 var doc = EJSON.clone(fields);29 doc._id = id;30 callbacks.addedBefore && callbacks.addedBefore.call(31 self, id, fields, before);32 // This line triggers if we provide added with movedBefore.33 callbacks.added && callbacks.added.call(self, id, fields);34 // XXX could `before` be a falsy ID? Technically35 // idStringify seems to allow for them -- though36 // OrderedDict won't call stringify on a falsy arg.37 self.docs.putBefore(id, doc, before || null);38 },39 movedBefore: function (id, before) {40 var doc = self.docs.get(id);41 callbacks.movedBefore && callbacks.movedBefore.call(self, id, before);42 self.docs.moveBefore(id, before || null);43 }44 };45 } else {46 self.docs = new LocalCollection._IdMap;47 self.applyChange = {48 added: function (id, fields) {49 var doc = EJSON.clone(fields);50 callbacks.added && callbacks.added.call(self, id, fields);51 doc._id = id;52 self.docs.set(id, doc);53 }54 };55 }56 // The methods in _IdMap and OrderedDict used by these callbacks are57 // identical.58 self.applyChange.changed = function (id, fields) {59 var doc = self.docs.get(id);60 if (!doc)61 throw new Error("Unknown id for changed: " + id);62 callbacks.changed && callbacks.changed.call(63 self, id, EJSON.clone(fields));64 LocalCollection._applyChanges(doc, fields);65 };66 self.applyChange.removed = function (id) {67 callbacks.removed && callbacks.removed.call(self, id);68 self.docs.remove(id);69 };70};71LocalCollection._observeFromObserveChanges = function (cursor, observeCallbacks) {72 var transform = cursor.getTransform() || function (doc) {return doc;};73 var suppressed = !!observeCallbacks._suppress_initial;74 var observeChangesCallbacks;75 if (LocalCollection._observeCallbacksAreOrdered(observeCallbacks)) {76 // The "_no_indices" option sets all index arguments to -1 and skips the77 // linear scans required to generate them. This lets observers that don't78 // need absolute indices benefit from the other features of this API --79 // relative order, transforms, and applyChanges -- without the speed hit.80 var indices = !observeCallbacks._no_indices;81 observeChangesCallbacks = {82 addedBefore: function (id, fields, before) {83 var self = this;84 if (suppressed || !(observeCallbacks.addedAt || observeCallbacks.added))85 return;86 var doc = transform(_.extend(fields, {_id: id}));87 if (observeCallbacks.addedAt) {88 var index = indices89 ? (before ? self.docs.indexOf(before) : self.docs.size()) : -1;90 observeCallbacks.addedAt(doc, index, before);91 } else {92 observeCallbacks.added(doc);93 }94 },95 changed: function (id, fields) {96 var self = this;97 if (!(observeCallbacks.changedAt || observeCallbacks.changed))98 return;99 var doc = EJSON.clone(self.docs.get(id));100 if (!doc)101 throw new Error("Unknown id for changed: " + id);102 var oldDoc = transform(EJSON.clone(doc));103 LocalCollection._applyChanges(doc, fields);104 doc = transform(doc);105 if (observeCallbacks.changedAt) {106 var index = indices ? self.docs.indexOf(id) : -1;107 observeCallbacks.changedAt(doc, oldDoc, index);108 } else {109 observeCallbacks.changed(doc, oldDoc);110 }111 },112 movedBefore: function (id, before) {113 var self = this;114 if (!observeCallbacks.movedTo)115 return;116 var from = indices ? self.docs.indexOf(id) : -1;117 var to = indices118 ? (before ? self.docs.indexOf(before) : self.docs.size()) : -1;119 // When not moving backwards, adjust for the fact that removing the120 // document slides everything back one slot.121 if (to > from)122 --to;123 observeCallbacks.movedTo(transform(EJSON.clone(self.docs.get(id))),124 from, to, before || null);125 },126 removed: function (id) {127 var self = this;128 if (!(observeCallbacks.removedAt || observeCallbacks.removed))129 return;130 // technically maybe there should be an EJSON.clone here, but it's about131 // to be removed from self.docs!132 var doc = transform(self.docs.get(id));133 if (observeCallbacks.removedAt) {134 var index = indices ? self.docs.indexOf(id) : -1;135 observeCallbacks.removedAt(doc, index);136 } else {137 observeCallbacks.removed(doc);138 }139 }140 };141 } else {142 observeChangesCallbacks = {143 added: function (id, fields) {144 if (!suppressed && observeCallbacks.added) {145 var doc = _.extend(fields, {_id: id});146 observeCallbacks.added(transform(doc));147 }148 },149 changed: function (id, fields) {150 var self = this;151 if (observeCallbacks.changed) {152 var oldDoc = self.docs.get(id);153 var doc = EJSON.clone(oldDoc);154 LocalCollection._applyChanges(doc, fields);155 observeCallbacks.changed(transform(doc),156 transform(EJSON.clone(oldDoc)));157 }158 },159 removed: function (id) {160 var self = this;161 if (observeCallbacks.removed) {162 observeCallbacks.removed(transform(self.docs.get(id)));163 }164 }165 };166 }167 var changeObserver = new LocalCollection._CachingChangeObserver(168 {callbacks: observeChangesCallbacks});169 var handle = cursor.observeChanges(changeObserver.applyChange);170 suppressed = false;171 return handle;...

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observableset.js

Source:observableset.js Github

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...61 return false;62 }63 this.observers_.push(observer);64 goog.array.forEach(this.observables_, function(o) {65 o.observe(observer);66 });67 return true;68};69/**70 * Removes an observer from the set. The observer will be removed from71 * all observables in the set. Does nothing if the observer is not in72 * the set.73 * @param {!goog.labs.observe.Observer} observer The observer to remove.74 * @return {boolean} Whether the observer is actually removed.75 */76goog.labs.observe.ObservableSet.prototype.removeObserver = function(observer) {77 // Check that the observer exists before removing.78 var removed = goog.array.removeIf(this.observers_, goog.partial(79 goog.labs.observe.Observer.equals, observer));80 if (removed) {81 goog.array.forEach(this.observables_, function(o) {82 o.unobserve(observer);83 });84 }85 return removed;86};87/**88 * Removes all registered observers.89 */90goog.labs.observe.ObservableSet.prototype.removeAllObservers = function() {91 this.unregisterAll_();92 this.observers_.length = 0;93};94/**95 * Adds an observable to the set. All previously added and future96 * observers will be added to the new observable as well.97 *98 * The observable will not be added if it is already registered in the99 * set.100 *101 * @param {!goog.labs.observe.Observable} observable The observable to add.102 * @return {boolean} Whether the observable is actually added.103 */104goog.labs.observe.ObservableSet.prototype.addObservable = function(observable) {105 if (goog.array.contains(this.observables_, observable)) {106 return false;107 }108 this.observables_.push(observable);109 goog.array.forEach(this.observers_, function(observer) {110 observable.observe(observer);111 });112 return true;113};114/**115 * Removes an observable from the set. All observers registered on the116 * set will be removed from the observable as well.117 * @param {!goog.labs.observe.Observable} observable The observable to remove.118 * @return {boolean} Whether the observable is actually removed.119 */120goog.labs.observe.ObservableSet.prototype.removeObservable = function(121 observable) {122 var removed = goog.array.remove(this.observables_, observable);123 if (removed) {124 goog.array.forEach(this.observers_, function(observer) {125 observable.unobserve(observer);126 });127 }128 return removed;129};130/**131 * Removes all registered observables.132 */133goog.labs.observe.ObservableSet.prototype.removeAllObservables = function() {134 this.unregisterAll_();135 this.observables_.length = 0;136};137/**138 * Removes all registered observations and observables.139 */140goog.labs.observe.ObservableSet.prototype.removeAll = function() {141 this.removeAllObservers();142 this.observables_.length = 0;143};144/**145 * Unregisters all registered observers from all registered observables.146 * @private147 */148goog.labs.observe.ObservableSet.prototype.unregisterAll_ = function() {149 goog.array.forEach(this.observers_, function(observer) {150 goog.array.forEach(this.observables_, function(o) {151 o.unobserve(observer);152 });153 }, this);...

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observationset.js

Source:observationset.js Github

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...50 * @return {boolean} True if the observer is successfully registered.51 */52goog.labs.observe.ObservationSet.prototype.observe = function(53 observable, observer) {54 var success = observable.observe(observer);55 if (success) {56 this.storedObservations_.push(57 new goog.labs.observe.ObservationSet.Observation_(58 observable, observer));59 }60 return success;61};62/**63 * Observes the given function on the observable.64 * @param {!goog.labs.observe.Observable} observable The observable to65 * observe on.66 * @param {function(!goog.labs.observe.Notice)} fn The handler function.67 * @param {!Object=} opt_scope Optional scope.68 * @return {goog.labs.observe.Observer} The registered observer object.69 * If the observer is not successfully registered, this will be null.70 */71goog.labs.observe.ObservationSet.prototype.observeWithFunction = function(72 observable, fn, opt_scope) {73 var observer = goog.labs.observe.Observer.fromFunction(74 fn, opt_scope || this.defaultScope_);75 if (this.observe(observable, observer)) {76 return observer;77 }78 return null;79};80/**81 * Unobserves the given observer from the observable.82 * @param {!goog.labs.observe.Observable} observable The observable to83 * unobserve from.84 * @param {!goog.labs.observe.Observer} observer The observer.85 * @return {boolean} True if the observer is successfully removed.86 */87goog.labs.observe.ObservationSet.prototype.unobserve = function(88 observable, observer) {89 var removed = goog.array.removeIf(90 this.storedObservations_, function(o) {91 return o.observable == observable &&92 goog.labs.observe.Observer.equals(o.observer, observer);93 });94 if (removed) {95 observable.unobserve(observer);96 }97 return removed;98};99/**100 * Unobserves the given function from the observable.101 * @param {!goog.labs.observe.Observable} observable The observable to102 * unobserve from.103 * @param {function(!goog.labs.observe.Notice)} fn The handler function.104 * @param {!Object=} opt_scope Optional scope.105 * @return {boolean} True if the observer is successfully removed.106 */107goog.labs.observe.ObservationSet.prototype.unobserveWithFunction = function(108 observable, fn, opt_scope) {109 var observer = goog.labs.observe.Observer.fromFunction(110 fn, opt_scope || this.defaultScope_);111 return this.unobserve(observable, observer);112};113/**114 * Removes all observations registered through this set.115 */116goog.labs.observe.ObservationSet.prototype.removeAll = function() {117 goog.array.forEach(this.storedObservations_, function(observation) {118 var observable = observation.observable;119 var observer = observation.observer;120 observable.unobserve(observer);121 });122};123/**124 * A representation of an observation, which is defined uniquely by125 * the observable and observer.126 * @param {!goog.labs.observe.Observable} observable The observable.127 * @param {!goog.labs.observe.Observer} observer The observer.128 * @constructor129 * @private130 */131goog.labs.observe.ObservationSet.Observation_ = function(132 observable, observer) {133 this.observable = observable;134 this.observer = observer;...

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simpleobservable.js

Source:simpleobservable.js Github

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...42 * };43 * goog.inherits(ClassA, goog.Disposable);44 *45 * ClassA.prototype.observe = function(observer) {46 * this.observable_.observe(observer);47 * };48 *49 * ClassA.prototype.unobserve = function(observer) {50 * this.observable_.unobserve(observer);51 * };52 *53 * ClassA.prototype.notify = function(opt_data) {54 * this.observable_.notify(opt_data);55 * };56 * </pre>57 *58 * @param {!goog.labs.observe.Observable=} opt_actualObservable59 * Optional observable object. Defaults to 'this'. When used as60 * base class, the parameter need not be given. It is only useful61 * when using this class to implement implement {@code Observable}62 * interface on another object, see example above.63 * @constructor64 * @implements {goog.labs.observe.Observable}...

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observer.js

Source:observer.js Github

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1// Copyright 2012 The Closure Library Authors. All Rights Reserved.2//3// Licensed under the Apache License, Version 2.0 (the "License");4// you may not use this file except in compliance with the License.5// You may obtain a copy of the License at6//7// http://www.apache.org/licenses/LICENSE-2.08//9// Unless required by applicable law or agreed to in writing, software10// distributed under the License is distributed on an "AS-IS" BASIS,11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.12// See the License for the specific language governing permissions and13// limitations under the License.14/**15 * @fileoverview Provide definition of an observer. This is meant to16 * be used with {@code goog.labs.observe.Observable}.17 *18 * This file also provides convenient functions to compare and create19 * Observer objects.20 *21 */22goog.provide('goog.labs.observe.Observer');23/**24 * A class implementing {@code Observer} may be informed of changes in25 * observable object.26 * @see {goog.labs.observe.Observable}27 * @interface28 */29goog.labs.observe.Observer = function() {};30/**31 * Notifies the observer of changes to the observable object.32 * @param {!goog.labs.observe.Notice} notice The notice object.33 */34goog.labs.observe.Observer.prototype.notify;35/**36 * Whether this observer is equal to the given observer.37 * @param {!goog.labs.observe.Observer} observer The observer to compare with.38 * @return {boolean} Whether the two observers are equal.39 */40goog.labs.observe.Observer.prototype.equals;41/**42 * @param {!goog.labs.observe.Observer} observer1 Observer to compare.43 * @param {!goog.labs.observe.Observer} observer2 Observer to compare.44 * @return {boolean} Whether observer1 and observer2 are equal, as45 * determined by the first observer1's {@code equals} method.46 */47goog.labs.observe.Observer.equals = function(observer1, observer2) {48 return observer1 == observer2 || observer1.equals(observer2);49};50/**51 * Creates an observer that calls the given function.52 * @param {function(!goog.labs.observe.Notice)} fn Function to be converted.53 * @param {!Object=} opt_scope Optional scope to execute the function.54 * @return {!goog.labs.observe.Observer} An observer object.55 */56goog.labs.observe.Observer.fromFunction = function(fn, opt_scope) {57 return new goog.labs.observe.Observer.FunctionObserver_(fn, opt_scope);58};59/**60 * An observer that calls the given function on {@code notify}.61 * @param {function(!goog.labs.observe.Notice)} fn Function to delegate to.62 * @param {!Object=} opt_scope Optional scope to execute the function.63 * @constructor64 * @implements {goog.labs.observe.Observer}65 * @private66 */67goog.labs.observe.Observer.FunctionObserver_ = function(fn, opt_scope) {68 this.fn_ = fn;69 this.scope_ = opt_scope;70};71/** @override */72goog.labs.observe.Observer.FunctionObserver_.prototype.notify = function(73 notice) {74 this.fn_.call(this.scope_, notice);75};76/** @override */77goog.labs.observe.Observer.FunctionObserver_.prototype.equals = function(78 observer) {79 return this.fn_ === observer.fn_ && this.scope_ === observer.scope_;...

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options.js

Source:options.js Github

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...12 test('attributeOldValue and attributes', function() {13 var div = document.createElement('div');14 var observer = new MutationObserver(function() {});15 assert.throws(function() {16 observer.observe(div, {17 attributeOldValue: true,18 attributes: false19 });20 }, TypeError);21 observer.observe(div, {22 attributeOldValue: true,23 });24 observer.observe(div, {25 attributeOldValue: false,26 attributes: false27 });28 observer.observe(div, {29 attributeOldValue: false,30 attributes: true31 });32 observer.observe(div, {33 attributeOldValue: true,34 attributes: true35 });36 });37 test('attributeFilter and attributes', function() {38 var div = document.createElement('div');39 var observer = new MutationObserver(function() {});40 assert.throws(function() {41 observer.observe(div, {42 attributeFilter: ['name'],43 attributes: false44 });45 }, TypeError);46 observer.observe(div, {47 attributeFilter: ['name'],48 });49 assert.throws(function() {50 observer.observe(div, {51 attributeFilter: null,52 });53 }, TypeError);54 observer.observe(div, {55 attributeFilter: ['name'],56 attributes: true57 });58 observer.observe(div, {59 attributes: false60 });61 observer.observe(div, {62 attributes: true63 });64 });65 test('characterDataOldValue and characterData', function() {66 var div = document.createElement('div');67 var observer = new MutationObserver(function() {});68 assert.throws(function() {69 observer.observe(div, {70 characterDataOldValue: true,71 characterData: false72 });73 }, TypeError);74 observer.observe(div, {75 characterDataOldValue: true76 });77 observer.observe(div, {78 characterDataOldValue: false,79 characterData: false80 });81 observer.observe(div, {82 characterDataOldValue: false,83 characterData: true84 });85 observer.observe(div, {86 characterDataOldValue: true,87 characterData: true88 });89 });90 });...

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index.js

Source:index.js Github

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1import observeEntries from './observeEntries'2import observePaint from './observePaint'3import observeLCP from './observeLCP'4import observeCLS from './observeCLS'5import observeFID from './observeFID'6import observerLoad from './observerLoad'7import observeFirstScreenPaint from './observeFirstScreenPaint'8import fps from './fps'9import onVueRouter from './onVueRouter'10import config from '../config'11export default function capturePerformance() {12 observeEntries()13 observePaint()14 observeLCP()15 observeCLS()16 observeFID()17 fps()18 observerLoad()19 observeFirstScreenPaint()20 if (config.vue?.Vue && config.vue?.router) {21 onVueRouter(config.vue.Vue, config.vue.router)22 }...

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Using AI Code Generation

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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.fill('input[title="Search"]', 'Playwright');7 await page.press('input[title="Search"]', 'Enter');8 await page.waitForNavigation();9 await page.screenshot({ path: 'google-playwright.png' });10 await browser.close();11})();12const { chromium } = require('playwright');13(async () => {14 const browser = await chromium.launch();15 const context = await browser.newContext();16 const page = await context.newPage();17 await page.fill('input[title="Search"]', 'Playwright');18 await page.press('input[title="Search"]', 'Enter');19 await page.waitForNavigation();20 await page.screenshot({ path: 'google-playwright.png' });21 await browser.close();22})();23const { chromium } = require('playwright');24(async () => {25 const browser = await chromium.launch();26 const context = await browser.newContext();27 const page = await context.newPage();28 await page.fill('input[title="Search"]', 'Playwright');29 await page.press('input[title="Search"]', 'Enter');30 await page.waitForNavigation();31 await page.screenshot({ path: 'google-playwright.png' });32 await browser.close();33})();34const { chromium } = require('playwright');35(async () => {36 const browser = await chromium.launch();37 const context = await browser.newContext();38 const page = await context.newPage();39 await page.fill('input[title="Search"]', 'Playwright');40 await page.press('input[title="Search"]', 'Enter');41 await page.waitForNavigation();42 await page.screenshot({ path: 'google-playwright.png' });43 await browser.close();44})();

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Using AI Code Generation

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1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch();4 const page = await browser.newPage();5 const client = await page.context().newCDPSession(page);6 await client.send('Network.enable');7 await client.send('Network.setCacheDisabled', { cacheDisabled: true });8 await client.send('Network.setRequestInterception', { patterns: [{ urlPattern: '*', interceptionStage: 'HeadersReceived' }] });9 client.on('Network.requestIntercepted', async ({ interceptionId, request }) => {10 await client.send('Network.continueInterceptedRequest', {11 headers: {12 },13 });14 });15 await page.screenshot({ path: 'example.png' });16 await browser.close();17})();

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Using AI Code Generation

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1const { chromium } = require('playwright');2const { observe } = require('playwright/lib/server/supplements/recorder/recorderSupplement');3(async () => {4 const browser = await chromium.launch({ headless: false });5 const context = await browser.newContext();6 await observe(context, true);7 const page = await context.newPage();8 await observe(context, false);9 await browser.close();10})();11const { chromium } = require('playwright');12const { observe } = require('playwright/lib/server/supplements/recorder/recorderSupplement');13(async () => {14 const browser = await chromium.launch({ headless: false });15 const context = await browser.newContext();16 await observe(context, true);17 const page = await context.newPage();18 await observe(context, false);19 await browser.close();20})();21This project is licensed under the terms of the [Apache License 2.0](

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Using AI Code Generation

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1const { chromium } = require('playwright');2(async () => {3 const browser = await chromium.launch();4 const page = await browser.newPage();5 await page.exposeBinding('log', (source, ...args) => {6 console.log(...args);7 });8 await page.evaluate(async () => {9 await window.__playwright__internal__object.observe('log', (message) => {10 window.log(message);11 });12 });13 await page.evaluate(() => {14 window.log('Hello World');15 });16 await browser.close();17})();18BrowserContext.exposeBinding(name, bindingCallback[, options])19BrowserContext.exposeBindingHandle(name, bindingCallback[, options])20Page.exposeBinding(name, bindingCallback[, options])21Page.exposeBindingHandle(name, bindingCallback[, options])

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Using AI Code Generation

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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 [request] = await Promise.all([7 page.waitForEvent('request'),8 ]);9 console.log(request.url());10 await browser.close();11})();12const { chromium } = require('playwright');13(async () => {14 const browser = await chromium.launch();15 const context = await browser.newContext();16 const page = await context.newPage();17 const [response] = await Promise.all([18 page.waitForEvent('response'),19 ]);20 console.log(response.url());21 await browser.close();22})();23const { chromium } = require('playwright');24(async () => {25 const browser = await chromium.launch();26 const context = await browser.newContext();27 const page = await context.newPage();28 const [request] = await Promise.all([29 page.waitForEvent('requestfailed'),30 ]);31 console.log(request.url());32 await browser.close();33})();34const { chromium } = require('playwright');35(async () => {36 const browser = await chromium.launch();37 const context = await browser.newContext();38 const page = await context.newPage();39 const [request] = await Promise.all([40 page.waitForEvent('requestfinished'),41 ]);42 console.log(request.url());43 await browser.close();44})();45const { chromium } = require('playwright');46(async () => {47 const browser = await chromium.launch();48 const context = await browser.newContext();49 const page = await context.newPage();50 const [request] = await Promise.all([51 page.waitForEvent('requestfinished'),52 ]);

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Using AI Code Generation

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1const { observe } = require('@playwright/test/lib/server/observer');2const { chromium } = require('playwright');3const browser = await chromium.launch();4const context = await browser.newContext();5const page = await context.newPage();6const observer = observe(page);7const { observe } = require('@playwright/test/lib/server/observer');8const { chromium } = require('playwright');9const browser = await chromium.launch();10const context = await browser.newContext();11const page = await context.newPage();12const observer = observe(page);13const { observe } = require('@playwright/test/lib/server/observer');14const { chromium } = require('playwright');15const browser = await chromium.launch();16const context = await browser.newContext();17const page = await context.newPage();18const observer = observe(page);19const { observe } = require('@playwright/test/lib/server/observer');20const { chromium } = require('playwright');21const browser = await chromium.launch();22const context = await browser.newContext();23const page = await context.newPage();24const observer = observe(page);25const { observe } = require('@playwright/test/lib/server/observer');26const { chromium } = require('playwright');27const browser = await chromium.launch();28const context = await browser.newContext();29const page = await context.newPage();30const observer = observe(page);31const { observe } = require('@playwright/test/lib/server/observer');32const { chromium } = require('playwright');33const browser = await chromium.launch();34const context = await browser.newContext();35const page = await context.newPage();36const observer = observe(page);37const { observe } = require('@playwright/test/lib/server/observer');38const { chromium } = require('playwright');

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Using AI Code Generation

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1const { Playwright } = require('playwright-core');2const { chromium } = require('playwright-core');3const path = require('path');4const fs = require('fs');5(async () => {6 const browser = await chromium.launch({ headless: false });7 const context = await browser.newContext();8 const page = await context.newPage();9 const controller = await page._delegate.observeDownload();10 await page.click('text=Get Started');11 const download = await controller.next();12 console.log(await download.path());13 await browser.close();14})();15const { Playwright } = require('playwright-core');16const { chromium } = require('playwright-core');17const path = require('path');18const fs = require('fs');19(async () => {20 const browser = await chromium.launch({ headless: false });21 const context = await browser.newContext();22 const page = await context.newPage();23 const controller = await page._delegate.observeDownload();24 await page.click('text=Get Started');25 const download = await controller.next();26 console.log(await download.path());27 await browser.close();28})();29const { Playwright } = require('playwright-core');30const { chromium } = require('playwright-core');31const path = require('path');32const fs = require('fs');33(async () => {34 const browser = await chromium.launch({ headless: false });35 const context = await browser.newContext();36 const page = await context.newPage();37 const controller = await page._delegate.observeDownload();38 await page.click('text=Get Started');39 const download = await controller.next();40 console.log(await download.path());41 await browser.close();42})();43const { Playwright } = require('playwright-core');44const { chromium } = require('playwright-core');45const path = require('path');46const fs = require('fs');47(async () => {48 const browser = await chromium.launch({ headless: false });49 const context = await browser.newContext();

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Using AI Code Generation

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1const { Page } = require('playwright');2const { PageProxy } = require('playwright/lib/server/pageProxy');3const { Events } = require('playwright/lib/server/events');4const { helper } = require('playwright/lib/helper');5const { assert } = require('playwright/lib/utils/utils');6const { TimeoutError } = require('playwright/lib/errors');7const { debugLogger } = require('playwright/lib/utils/debugLogger');8const { EventEmitter } = require('events');9class MyPage extends Page {10 constructor(delegate, browserContext, pageOrError) {11 super(delegate, browserContext, pageOrError);12 this._eventEmitter = new EventEmitter();13 }14 async observe(event) {15 return new Promise((resolve, reject) => {16 if (this._eventEmitter.listenerCount(event) > 0) {17 reject(new Error(`Event ${event} already observed`));18 }19 this._eventEmitter.on(event, (data) => {20 resolve(data);21 });22 });23 }24 _onBindingCalled(payload) {25 super._onBindingCalled(payload);26 this._eventEmitter.emit('bindingCalled', payload);27 }28}29class MyPageProxy extends PageProxy {30 constructor(parent, guid, initializer) {31 super(parent, guid, initializer);32 this._eventEmitter = new EventEmitter();33 }34 async observe(event) {35 return new Promise((resolve, reject) => {36 if (this._eventEmitter.listenerCount(event) > 0) {37 reject(new Error(`Event ${event} already observed`));38 }39 this._eventEmitter.on(event, (data) => {40 resolve(data);41 });42 });43 }44 _onBindingCalled(params) {45 super._onBindingCalled(params);46 this._eventEmitter.emit('bindingCalled', params);47 }48}49class MyEvents extends Events {50 constructor(connection, context) {51 super(connection, context);52 this._eventEmitter = new EventEmitter();53 }54 async observe(event) {55 return new Promise((resolve, reject) => {56 if (this._eventEmitter.listenerCount(event) > 0) {57 reject(new Error(`Event ${event} already observed`));58 }59 this._eventEmitter.on(event, (data) => {60 resolve(data);61 });62 });63 }64 _onBindingCalled(params) {65 super._onBindingCalled(params);

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1const { chromium } = require('playwright');2const { createTracing } = require('@tracerbench/core');3const { observe } = require('@tracerbench/observe');4const { observeTraceEvents } = require('@tracerbench/observe');5(async () => {6 const browser = await chromium.launch();7 const page = await browser.newPage();8 const tracing = await createTracing(page);9 const traceEvents = await observeTraceEvents(page, async () => {10 await page.click('text=Get Started');11 });12 await tracing.stop();13 await browser.close();14})();15const { chromium } = require('playwright');16const { createTracing } = require('@tracerbench/core');17const { observe } = require('@tracerbench/observe');18const { observeTraceEvents } = require('@tracerbench/observe');19(async () => {20 const browser = await chromium.launch();21 const page = await browser.newPage();22 const tracing = await createTracing(page);23 const traceEvents = await observeTraceEvents(page, async () => {24 await page.click('text=Get Started');25 });26 await tracing.stop();27 await browser.close();28})();29const { chromium } = require('playwright');30const { createTracing } = require('@tracerbench/core');31const { observe } = require('@tracerbench/observe');32const { observeTraceEvents } = require('@tracerbench/observe');33(async () => {34 const browser = await chromium.launch();35 const page = await browser.newPage();36 const tracing = await createTracing(page);37 const traceEvents = await observeTraceEvents(page, async () => {38 await page.click('text=Get Started');39 });40 await tracing.stop();41 await browser.close();42})();43const { chromium } = require('playwright');44const { createTracing } = require('@tracerbench/core');45const { observe

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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:

  1. 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.
  2. 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.
  3. 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.
  4. 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.
  5. Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
  6. 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.
  7. 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.
  8. 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.
  9. 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.
  10. 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.
  11. 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.
  12. Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.

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