How to use EvaluateFunctionHandleAsync method of PuppeteerSharp.JSHandle class

Best Puppeteer-sharp code snippet using PuppeteerSharp.JSHandle.EvaluateFunctionHandleAsync

DOMWorld.cs

Source:DOMWorld.cs

...60        {61            var context = await GetExecutionContextAsync().ConfigureAwait(false);62            return await context.EvaluateExpressionHandleAsync(script).ConfigureAwait(false);63        }64        internal async Task<JSHandle> EvaluateFunctionHandleAsync(string script, params object[] args)65        {66            var context = await GetExecutionContextAsync().ConfigureAwait(false);67            return await context.EvaluateFunctionHandleAsync(script, args).ConfigureAwait(false);68        }69        internal async Task<T> EvaluateExpressionAsync<T>(string script)70        {71            var context = await GetExecutionContextAsync().ConfigureAwait(false);72            return await context.EvaluateExpressionAsync<T>(script).ConfigureAwait(false);73        }74        internal async Task<JToken> EvaluateExpressionAsync(string script)75        {76            var context = await GetExecutionContextAsync().ConfigureAwait(false);77            return await context.EvaluateExpressionAsync(script).ConfigureAwait(false);78        }79        internal async Task<T> EvaluateFunctionAsync<T>(string script, params object[] args)80        {81            var context = await GetExecutionContextAsync().ConfigureAwait(false);82            return await context.EvaluateFunctionAsync<T>(script, args).ConfigureAwait(false);83        }84        internal async Task<JToken> EvaluateFunctionAsync(string script, params object[] args)85        {86            var context = await GetExecutionContextAsync().ConfigureAwait(false);87            return await context.EvaluateFunctionAsync(script, args).ConfigureAwait(false);88        }89        internal Task<string> GetContentAsync() => EvaluateFunctionAsync<string>(@"() => {90                let retVal = '';91                if (document.doctype)92                    retVal = new XMLSerializer().serializeToString(document.doctype);93                if (document.documentElement)94                    retVal += document.documentElement.outerHTML;95                return retVal;96            }");97        internal async Task SetContentAsync(string html, NavigationOptions options = null)98        {99            var waitUntil = options?.WaitUntil ?? new[] { WaitUntilNavigation.Load };100            var timeout = options?.Timeout ?? _timeoutSettings.NavigationTimeout;101            // We rely upon the fact that document.open() will reset frame lifecycle with "init"102            // lifecycle event. @see https://crrev.com/608658103            await EvaluateFunctionAsync(@"html => {104                document.open();105                document.write(html);106                document.close();107            }", html).ConfigureAwait(false);108            using (var watcher = new LifecycleWatcher(_frameManager, Frame, waitUntil, timeout))109            {110                var watcherTask = await Task.WhenAny(111                    watcher.TimeoutOrTerminationTask,112                    watcher.LifecycleTask).ConfigureAwait(false);113                await watcherTask.ConfigureAwait(false);114            }115        }116        internal async Task<ElementHandle> AddScriptTagAsync(AddTagOptions options)117        {118            const string addScriptUrl = @"async function addScriptUrl(url, type) {119              const script = document.createElement('script');120              script.src = url;121              if(type)122                script.type = type;123              const promise = new Promise((res, rej) => {124                script.onload = res;125                script.onerror = rej;126              });127              document.head.appendChild(script);128              await promise;129              return script;130            }";131            const string addScriptContent = @"function addScriptContent(content, type = 'text/javascript') {132              const script = document.createElement('script');133              script.type = type;134              script.text = content;135              let error = null;136              script.onerror = e => error = e;137              document.head.appendChild(script);138              if (error)139                throw error;140              return script;141            }";142            async Task<ElementHandle> AddScriptTagPrivate(string script, string urlOrContent, string type)143            {144                var context = await GetExecutionContextAsync().ConfigureAwait(false);145                return (string.IsNullOrEmpty(type)146                        ? await context.EvaluateFunctionHandleAsync(script, urlOrContent).ConfigureAwait(false)147                        : await context.EvaluateFunctionHandleAsync(script, urlOrContent, type).ConfigureAwait(false)) as ElementHandle;148            }149            if (!string.IsNullOrEmpty(options.Url))150            {151                var url = options.Url;152                try153                {154                    return await AddScriptTagPrivate(addScriptUrl, url, options.Type).ConfigureAwait(false);155                }156                catch (PuppeteerException)157                {158                    throw new PuppeteerException($"Loading script from {url} failed");159                }160            }161            if (!string.IsNullOrEmpty(options.Path))162            {163                var contents = await AsyncFileHelper.ReadAllText(options.Path).ConfigureAwait(false);164                contents += "//# sourceURL=" + options.Path.Replace("\n", string.Empty);165                return await AddScriptTagPrivate(addScriptContent, contents, options.Type).ConfigureAwait(false);166            }167            if (!string.IsNullOrEmpty(options.Content))168            {169                return await AddScriptTagPrivate(addScriptContent, options.Content, options.Type).ConfigureAwait(false);170            }171            throw new ArgumentException("Provide options with a `Url`, `Path` or `Content` property");172        }173        internal async Task<ElementHandle> AddStyleTagAsync(AddTagOptions options)174        {175            const string addStyleUrl = @"async function addStyleUrl(url) {176              const link = document.createElement('link');177              link.rel = 'stylesheet';178              link.href = url;179              const promise = new Promise((res, rej) => {180                link.onload = res;181                link.onerror = rej;182              });183              document.head.appendChild(link);184              await promise;185              return link;186            }";187            const string addStyleContent = @"async function addStyleContent(content) {188              const style = document.createElement('style');189              style.type = 'text/css';190              style.appendChild(document.createTextNode(content));191              const promise = new Promise((res, rej) => {192                style.onload = res;193                style.onerror = rej;194              });195              document.head.appendChild(style);196              await promise;197              return style;198            }";199            if (!string.IsNullOrEmpty(options.Url))200            {201                var url = options.Url;202                try203                {204                    var context = await GetExecutionContextAsync().ConfigureAwait(false);205                    return (await context.EvaluateFunctionHandleAsync(addStyleUrl, url).ConfigureAwait(false)) as ElementHandle;206                }207                catch (PuppeteerException)208                {209                    throw new PuppeteerException($"Loading style from {url} failed");210                }211            }212            if (!string.IsNullOrEmpty(options.Path))213            {214                var contents = await AsyncFileHelper.ReadAllText(options.Path).ConfigureAwait(false);215                contents += "//# sourceURL=" + options.Path.Replace("\n", string.Empty);216                var context = await GetExecutionContextAsync().ConfigureAwait(false);217                return (await context.EvaluateFunctionHandleAsync(addStyleContent, contents).ConfigureAwait(false)) as ElementHandle;218            }219            if (!string.IsNullOrEmpty(options.Content))220            {221                var context = await GetExecutionContextAsync().ConfigureAwait(false);222                return (await context.EvaluateFunctionHandleAsync(addStyleContent, options.Content).ConfigureAwait(false)) as ElementHandle;223            }224            throw new ArgumentException("Provide options with a `Url`, `Path` or `Content` property");225        }226        internal Task<ElementHandle> WaitForSelectorAsync(string selector, WaitForSelectorOptions options = null)227            => WaitForSelectorOrXPathAsync(selector, false, options);228        internal Task<ElementHandle> WaitForXPathAsync(string xpath, WaitForSelectorOptions options = null)229            => WaitForSelectorOrXPathAsync(xpath, true, options);230        internal Task<JSHandle> WaitForFunctionAsync(string script, WaitForFunctionOptions options, params object[] args)231            => new WaitTask(232                this,233                script,234                false,235                "function",236                options.Polling,...

ExecutionContext.cs

Source:ExecutionContext.cs

...69        /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.70        /// <see cref="JSHandle"/> instances can be passed as arguments71        /// </remarks>72        /// <seealso cref="EvaluateExpressionAsync{T}(string)"/>73        /// <seealso cref="EvaluateFunctionHandleAsync(string, object[])"/>74        /// <returns>Task which resolves to script return value</returns>75        public Task<JToken> EvaluateFunctionAsync(string script, params object[] args)76            => EvaluateAsync<JToken>(EvaluateFunctionHandleAsync(script, args));77        /// <summary>78        /// Executes a function in browser context79        /// </summary>80        /// <typeparam name="T">The type to deserialize the result to</typeparam>81        /// <param name="script">Script to be evaluated in browser context</param>82        /// <param name="args">Arguments to pass to script</param>83        /// <remarks>84        /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.85        /// <see cref="JSHandle"/> instances can be passed as arguments86        /// </remarks>87        /// <seealso cref="EvaluateExpressionAsync{T}(string)"/>88        /// <seealso cref="EvaluateFunctionHandleAsync(string, object[])"/>89        /// <returns>Task which resolves to script return value</returns>90        public Task<T> EvaluateFunctionAsync<T>(string script, params object[] args)91            => EvaluateAsync<T>(EvaluateFunctionHandleAsync(script, args));92        /// <summary>93        /// The method iterates JavaScript heap and finds all the objects with the given prototype.94        /// </summary>95        /// <returns>A task which resolves to a handle to an array of objects with this prototype.</returns>96        /// <param name="prototypeHandle">A handle to the object prototype.</param>97        public async Task<JSHandle> QueryObjectsAsync(JSHandle prototypeHandle)98        {99            if (prototypeHandle.Disposed)100            {101                throw new PuppeteerException("Prototype JSHandle is disposed!");102            }103            if (!((JObject)prototypeHandle.RemoteObject).TryGetValue(MessageKeys.ObjectId, out var objectId))104            {105                throw new PuppeteerException("Prototype JSHandle must not be referencing primitive value");106            }107            var response = await _client.SendAsync("Runtime.queryObjects", new Dictionary<string, object>108            {109                {"prototypeObjectId", objectId.ToString()}110            }).ConfigureAwait(false);111            return CreateJSHandle(response[MessageKeys.Objects]);112        }113        internal async Task<JSHandle> EvaluateExpressionHandleAsync(string script)114        {115            if (string.IsNullOrEmpty(script))116            {117                return null;118            }119            try120            {121                return await EvaluateHandleAsync("Runtime.evaluate", new Dictionary<string, object>122                {123                    ["expression"] = _sourceUrlRegex.IsMatch(script) ? script : $"{script}\n{EvaluationScriptSuffix}",124                    ["contextId"] = _contextId,125                    ["returnByValue"] = false,126                    ["awaitPromise"] = true,127                    ["userGesture"] = true128                }).ConfigureAwait(false);129            }130            catch (Exception ex)131            {132                throw new EvaluationFailedException(ex.Message, ex);133            }134        }135        internal async Task<JSHandle> EvaluateFunctionHandleAsync(string script, params object[] args)136        {137            if (string.IsNullOrEmpty(script))138            {139                return null;140            }141            try142            {143                return await EvaluateHandleAsync("Runtime.callFunctionOn", new Dictionary<string, object>144                {145                    ["functionDeclaration"] = $"{script}\n{EvaluationScriptSuffix}\n",146                    [MessageKeys.ExecutionContextId] = _contextId,147                    ["arguments"] = args.Select(FormatArgument),148                    ["returnByValue"] = false,149                    ["awaitPromise"] = true,...

JSHandle.cs

Source:JSHandle.cs

...7using System.Threading.Tasks;8namespace PuppeteerSharp9{10    /// <summary>11    /// JSHandle represents an in-page JavaScript object. JSHandles can be created with the <see cref="Page.EvaluateExpressionHandleAsync(string)"/> and <see cref="Page.EvaluateFunctionHandleAsync(string, object[])"/> methods.12    /// </summary>13    [JsonConverter(typeof(JSHandleMethodConverter))]14    public class JSHandle15    {16        internal JSHandle(ExecutionContext context, CDPSession client, RemoteObject remoteObject)17        {18            ExecutionContext = context;19            Client = client;20            RemoteObject = remoteObject;21        }22        /// <summary>23        /// Gets the execution context.24        /// </summary>25        /// <value>The execution context.</value>26        public ExecutionContext ExecutionContext { get; }27        /// <summary>28        /// Gets or sets a value indicating whether this <see cref="JSHandle"/> is disposed.29        /// </summary>30        /// <value><c>true</c> if disposed; otherwise, <c>false</c>.</value>31        public bool Disposed { get; private set; }32        /// <summary>33        /// Gets or sets the remote object.34        /// </summary>35        /// <value>The remote object.</value>36        public RemoteObject RemoteObject { get; }37        /// <summary>38        /// Gets the client.39        /// </summary>40        /// <value>The client.</value>41        protected CDPSession Client { get; }42        /// <summary>43        /// Fetches a single property from the referenced object44        /// </summary>45        /// <param name="propertyName">property to get</param>46        /// <returns>Task of <see cref="JSHandle"/></returns>47        public async Task<JSHandle> GetPropertyAsync(string propertyName)48        {49            var objectHandle = await EvaluateFunctionHandleAsync(@"(object, propertyName) => {50              const result = { __proto__: null};51              result[propertyName] = object[propertyName];52              return result;53            }", propertyName).ConfigureAwait(false);54            var properties = await objectHandle.GetPropertiesAsync().ConfigureAwait(false);55            properties.TryGetValue(propertyName, out var result);56            await objectHandle.DisposeAsync().ConfigureAwait(false);57            return result;58        }59        /// <summary>60        /// Returns a <see cref="Dictionary{TKey, TValue}"/> with property names as keys and <see cref="JSHandle"/> instances for the property values.61        /// </summary>62        /// <returns>Task which resolves to a <see cref="Dictionary{TKey, TValue}"/></returns>63        /// <example>64        /// <code>65        /// var handle = await page.EvaluateExpressionHandle("({window, document})");66        /// var properties = await handle.GetPropertiesAsync();67        /// var windowHandle = properties["window"];68        /// var documentHandle = properties["document"];69        /// await handle.DisposeAsync();70        /// </code>71        /// </example>72        public async Task<Dictionary<string, JSHandle>> GetPropertiesAsync()73        {74            var response = await Client.SendAsync<RuntimeGetPropertiesResponse>("Runtime.getProperties", new RuntimeGetPropertiesRequest75            {76                ObjectId = RemoteObject.ObjectId,77                OwnProperties = true78            }).ConfigureAwait(false);79            var result = new Dictionary<string, JSHandle>();80            foreach (var property in response.Result)81            {82                if (property.Enumerable == null)83                {84                    continue;85                }86                result.Add(property.Name, ExecutionContext.CreateJSHandle(property.Value));87            }88            return result;89        }90        /// <summary>91        /// Returns a JSON representation of the object92        /// </summary>93        /// <returns>Task</returns>94        /// <remarks>95        /// The method will return an empty JSON if the referenced object is not stringifiable. It will throw an error if the object has circular references96        /// </remarks>97        public async Task<object> JsonValueAsync() => await JsonValueAsync<object>().ConfigureAwait(false);98        /// <summary>99        /// Returns a JSON representation of the object100        /// </summary>101        /// <typeparam name="T">A strongly typed object to parse to</typeparam>102        /// <returns>Task</returns>103        /// <remarks>104        /// The method will return an empty JSON if the referenced object is not stringifiable. It will throw an error if the object has circular references105        /// </remarks>106        public async Task<T> JsonValueAsync<T>()107        {108            var objectId = RemoteObject.ObjectId;109            if (objectId != null)110            {111                var response = await Client.SendAsync<RuntimeCallFunctionOnResponse>("Runtime.callFunctionOn", new RuntimeCallFunctionOnRequest112                {113                    FunctionDeclaration = "function() { return this; }",114                    ObjectId = objectId,115                    ReturnByValue = true,116                    AwaitPromise = true117                }).ConfigureAwait(false);118                return (T)RemoteObjectHelper.ValueFromRemoteObject<T>(response.Result);119            }120            return (T)RemoteObjectHelper.ValueFromRemoteObject<T>(RemoteObject);121        }122        /// <summary>123        /// Disposes the Handle. It will mark the JSHandle as disposed and release the <see cref="JSHandle.RemoteObject"/>124        /// </summary>125        /// <returns>The async.</returns>126        public async Task DisposeAsync()127        {128            if (Disposed)129            {130                return;131            }132            Disposed = true;133            await RemoteObjectHelper.ReleaseObjectAsync(Client, RemoteObject).ConfigureAwait(false);134        }135        /// <inheritdoc/>136        public override string ToString()137        {138            if (RemoteObject.ObjectId != null)139            {140                var type = RemoteObject.Subtype != RemoteObjectSubtype.Other141                    ? RemoteObject.Subtype.ToString()142                    : RemoteObject.Type.ToString();143                return "JSHandle@" + type.ToLower(System.Globalization.CultureInfo.CurrentCulture);144            }145            return "JSHandle:" + RemoteObjectHelper.ValueFromRemoteObject<object>(RemoteObject)?.ToString();146        }147        /// <summary>148        /// Executes a script in browser context149        /// </summary>150        /// <param name="pageFunction">Script to be evaluated in browser context</param>151        /// <param name="args">Function arguments</param>152        /// <remarks>153        /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.154        /// <see cref="JSHandle"/> instances can be passed as arguments155        /// </remarks>156        /// <returns>Task which resolves to script return value</returns>157        public Task<JSHandle> EvaluateFunctionHandleAsync(string pageFunction, params object[] args)158        {159            var list = new List<object>(args);160            list.Insert(0, this);161            return ExecutionContext.EvaluateFunctionHandleAsync(pageFunction, list.ToArray());162        }163        /// <summary>164        /// Executes a function in browser context165        /// </summary>166        /// <param name="script">Script to be evaluated in browser context</param>167        /// <param name="args">Arguments to pass to script</param>168        /// <remarks>169        /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.170        /// <see cref="JSHandle"/> instances can be passed as arguments171        /// </remarks>172        /// <returns>Task which resolves to script return value</returns>173        public Task<JToken> EvaluateFunctionAsync(string script, params object[] args)174        {175            var list = new List<object>(args);...

WaitTask.cs

Source:WaitTask.cs

...142            Exception exception = null;143            var context = await _frame.GetExecutionContextAsync().ConfigureAwait(false);144            try145            {146                success = await context.EvaluateFunctionHandleAsync(WaitForPredicatePageFunction,147                    new object[] { _predicateBody, _pollingInterval ?? (object)_polling, _timeout }.Concat(_args).ToArray()).ConfigureAwait(false);148            }149            catch (Exception ex)150            {151                exception = ex;152            }153            if (_terminated || runCount != _runCount)154            {155                if (success != null)156                {157                    await success.DisposeAsync().ConfigureAwait(false);158                }159                return;160            }...

PageEvaluateHandle.cs

Source:PageEvaluateHandle.cs

...13        }14        [PuppeteerTest("jshandle.spec.ts", "Page.evaluateHandle", "should work")]15        [PuppeteerFact]16        public async Task ShouldWork()17            => Assert.NotNull(await Page.EvaluateFunctionHandleAsync("() => window"));18        [PuppeteerTest("jshandle.spec.ts", "Page.evaluateHandle", "should accept object handle as an argument")]19        [PuppeteerFact]20        public async Task ShouldAcceptObjectHandleAsAnArgument()21        {22            var navigatorHandle = await Page.EvaluateFunctionHandleAsync("() => navigator");23            var text = await Page.EvaluateFunctionAsync<string>(24                "(e) => e.userAgent",25                navigatorHandle);26            Assert.Contains("Mozilla", text);27        }28        [PuppeteerTest("jshandle.spec.ts", "Page.evaluateHandle", "should accept object handle to primitive types")]29        [PuppeteerFact]30        public async Task ShouldAcceptObjectHandleToPrimitiveTypes()31        {32            var aHandle = await Page.EvaluateFunctionHandleAsync("() => 5");33            var isFive = await Page.EvaluateFunctionAsync<bool>(34                "(e) => Object.is(e, 5)",35                aHandle);36            Assert.True(isFive);37        }38        [PuppeteerTest("jshandle.spec.ts", "Page.evaluateHandle", "should warn on nested object handles")]39        [PuppeteerFact]40        public async Task ShouldWarnOnNestedObjectHandles()41        {42            var aHandle = await Page.EvaluateFunctionHandleAsync("() => document.body");43            var exception = await Assert.ThrowsAsync<EvaluationFailedException>(() =>44                Page.EvaluateFunctionHandleAsync("(opts) => opts.elem.querySelector('p')", new { aHandle }));45            Assert.Contains("Are you passing a nested JSHandle?", exception.Message);46        }47        [PuppeteerTest("jshandle.spec.ts", "Page.evaluateHandle", "should accept object handle to unserializable value")]48        [PuppeteerFact]49        public async Task ShouldAcceptObjectHandleToUnserializableValue()50        {51            var aHandle = await Page.EvaluateFunctionHandleAsync("() => Infinity");52            Assert.True(await Page.EvaluateFunctionAsync<bool>(53                "(e) => Object.is(e, Infinity)",54                aHandle));55        }56        [PuppeteerTest("jshandle.spec.ts", "Page.evaluateHandle", "should use the same JS wrappers")]57        [PuppeteerFact]58        public async Task ShouldUseTheSameJSWrappers()59        {60            var aHandle = await Page.EvaluateFunctionHandleAsync(@"() => {61                globalThis.FOO = 123;62                return window;63            }");64            Assert.Equal(123, await Page.EvaluateFunctionAsync<int>(65                "(e) => e.FOO",66                aHandle));67        }68    }69}...

JsonValueTests.cs

Source:JsonValueTests.cs

...23        [PuppeteerTest("jshandle.spec.ts", "JSHandle.jsonValue", "works with jsonValues that are not objects")]24        [SkipBrowserFact(skipFirefox: true)]25        public async Task WorksWithJsonValuesThatAreNotObjects()26        {27            var aHandle = await Page.EvaluateFunctionHandleAsync("() => ['a', 'b']");28            var json = await aHandle.JsonValueAsync<string[]>();29            Assert.Equal(new[] {"a","b" }, json);30        }31        [PuppeteerTest("jshandle.spec.ts", "JSHandle.jsonValue", "works with jsonValues that are primitives")]32        [SkipBrowserFact(skipFirefox: true)]33        public async Task WorksWithJsonValuesThatArePrimitives()34        {35            var aHandle = await Page.EvaluateFunctionHandleAsync("() => 'foo'");36            var json = await aHandle.JsonValueAsync<string>();37            Assert.Equal("foo", json);38        }39        [PuppeteerTest("jshandle.spec.ts", "JSHandle.jsonValue", "should not work with dates")]40        [SkipBrowserFact(skipFirefox: true)]41        public async Task ShouldNotWorkWithDates()42        {43            var dateHandle = await Page.EvaluateExpressionHandleAsync("new Date('2017-09-26T00:00:00.000Z')");44            var json = await dateHandle.JsonValueAsync();45            Assert.Equal(JObject.Parse("{}"), json);46        }47        [PuppeteerTest("jshandle.spec.ts", "JSHandle.jsonValue", "should throw for circular objects")]48        [PuppeteerFact]49        public async Task ShouldThrowForCircularObjects()...

QueryObjectsTests.cs

Source:QueryObjectsTests.cs

...26        {27            // Instantiate an object28            await Page.GoToAsync(TestConstants.EmptyPage);29            await Page.EvaluateFunctionAsync("() => window.set = new Set(['hello', 'world'])");30            var prototypeHandle = await Page.EvaluateFunctionHandleAsync("() => Set.prototype");31            var objectsHandle = await Page.QueryObjectsAsync(prototypeHandle);32            var count = await Page.EvaluateFunctionAsync<int>("objects => objects.length", objectsHandle);33            Assert.Equal(1, count);34        }35        [Fact]36        public async Task ShouldFailForDisposedHandles()37        {38            var prototypeHandle = await Page.EvaluateExpressionHandleAsync("HTMLBodyElement.prototype");39            await prototypeHandle.DisposeAsync();40            var exception = await Assert.ThrowsAsync<PuppeteerException>(()41                => Page.QueryObjectsAsync(prototypeHandle));42            Assert.Equal("Prototype JSHandle is disposed!", exception.Message);43        }44        [Fact]...

GetPropertiesTests.cs

Source:GetPropertiesTests.cs

...26        [PuppeteerTest("jshandle.spec.ts", "JSHandle.getProperties", "should return even non-own properties")]27        [PuppeteerFact]28        public async Task ShouldReturnEvenNonOwnProperties()29        {30            var aHandle = await Page.EvaluateFunctionHandleAsync(@"() => {31              class A {32                constructor() {33                  this.a = '1';34                }35              }36              class B extends A {37                constructor() {38                  super();39                  this.b = '2';40                }41              }42              return new B();43            }");44            var properties = await aHandle.GetPropertiesAsync();...

EvaluateFunctionHandleAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static async Task Main(string[] args)7        {8            var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });9            var page = await browser.NewPageAsync();10            var jsHandle = await page.EvaluateFunctionHandleAsync(@"() => {11                return {12                };13            }");14            var result = await jsHandle.EvaluateFunctionHandleAsync(@"(obj) => {15                return {16                };17            }", jsHandle);18            Console.WriteLine(result);19            await browser.CloseAsync();20        }21    }22}23using System;24using System.Threading.Tasks;25using PuppeteerSharp;26{27    {28        static async Task Main(string[] args)29        {30            var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });31            var page = await browser.NewPageAsync();32            var jsHandle = await page.EvaluateFunctionHandleAsync(@"() => {33                return {34                };35            }");36            var result = await jsHandle.EvaluateFunctionHandleAsync(@"(obj) => {37                return {38                };39            }", jsHandle);40            var json = await result.JsonValueAsync();41            Console.WriteLine(json);42            await browser.CloseAsync();43        }44    }45}46{47  "obj": {48    "window": {},49    "document": {}50  },51  "x": {}52}53using System;54using System.Threading.Tasks;55using PuppeteerSharp;56{57    {58        static async Task Main(string[] args)59        {60            var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });61            var page = await browser.NewPageAsync();

EvaluateFunctionHandleAsync

Using AI Code Generation

1var page = await browser.NewPageAsync();2var result = await page.EvaluateFunctionHandleAsync(@"() => {3    return {4    };5}");6var windowHandle = await result.GetPropertyAsync("window");7var documentHandle = await result.GetPropertyAsync("document");8await windowHandle.DisposeAsync();9await documentHandle.DisposeAsync();10await result.DisposeAsync();11var page = await browser.NewPageAsync();12var result = await page.EvaluateFunctionHandleAsync(@"() => {13    return {14    };15}");16var windowHandle = await result.GetPropertyAsync("window");17var documentHandle = await result.GetPropertyAsync("document");18await windowHandle.DisposeAsync();19await documentHandle.DisposeAsync();20await result.DisposeAsync();21var page = await browser.NewPageAsync();22var frame = page.MainFrame;23var result = await frame.EvaluateFunctionHandleAsync(@"() => {24    return {25    };26}");27var windowHandle = await result.GetPropertyAsync("window");28var documentHandle = await result.GetPropertyAsync("document");29await windowHandle.DisposeAsync();30await documentHandle.DisposeAsync();31await result.DisposeAsync();32var page = await browser.NewPageAsync();33var elementHandle = await page.QuerySelectorAsync("body");34var result = await elementHandle.EvaluateFunctionHandleAsync(@"() => {35    return {36    };37}");38var windowHandle = await result.GetPropertyAsync("window");39var documentHandle = await result.GetPropertyAsync("document");40await windowHandle.DisposeAsync();41await documentHandle.DisposeAsync();42await result.DisposeAsync();43await elementHandle.DisposeAsync();44var page = await browser.NewPageAsync();45var result = await page.EvaluateFunctionHandleAsync(@"() => {46    return {

EvaluateFunctionHandleAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static async Task Main(string[] args)7        {8            var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });9            var page = await browser.NewPageAsync();10            var functionHandle = await page.EvaluateFunctionHandleAsync("() => document.body");11            var result = await functionHandle.EvaluateFunctionHandleAsync("body => body.innerHTML");12            Console.WriteLine(result);13            await browser.CloseAsync();14        }15    }16}17using System;18using System.Threading.Tasks;19using PuppeteerSharp;20{21    {22        static async Task Main(string[] args)23        {24            var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });25            var page = await browser.NewPageAsync();26            var functionHandle = await page.EvaluateFunctionHandleAsync("() => document.body");27            var result = await functionHandle.EvaluateFunctionHandleAsync("body => body.innerHTML", new object[] { functionHandle });28            Console.WriteLine(result);29            await browser.CloseAsync();30        }31    }32}33using System;

EvaluateFunctionHandleAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static void Main(string[] args)7        {8            MainAsync(args).GetAwaiter().GetResult();9        }10        static async Task MainAsync(string[] args)11        {12            var browser = await Puppeteer.LaunchAsync(new LaunchOptions13            {14            });15            var page = await browser.NewPageAsync();16            var handle = await page.EvaluateFunctionHandleAsync("() => Promise.resolve(8 * 7)");17            var result = await handle.JsonValueAsync();18            Console.WriteLine(result);19            await browser.CloseAsync();20        }21    }22}

EvaluateFunctionHandleAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static async Task Main(string[] args)7        {8            var browser = await Puppeteer.LaunchAsync(new LaunchOptions9            {10            });11            var page = await browser.NewPageAsync();12            var result = await page.EvaluateFunctionHandleAsync("() => document.title");13            Console.WriteLine(await result.JsonValueAsync());14        }15    }16}

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