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How to use FocusAsync method of PuppeteerSharp.ElementHandle class

Best Puppeteer-sharp code snippet using PuppeteerSharp.ElementHandle.FocusAsync

ElementHandle.cs

Source:ElementHandle.cs

...191        /// <summary>192        /// Calls <c>focus</c> <see href="https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/focus"/> on the element.193        /// </summary>194        /// <returns>Task</returns>195        public Task FocusAsync() => ExecutionContext.EvaluateFunctionAsync("element => element.focus()", this);196        /// <summary>197        /// Focuses the element, and sends a <c>keydown</c>, <c>keypress</c>/<c>input</c>, and <c>keyup</c> event for each character in the text.198        /// </summary>199        /// <param name="text">A text to type into a focused element</param>200        /// <param name="options">type options</param>201        /// <remarks>202        /// To press a special key, like <c>Control</c> or <c>ArrowDown</c> use <see cref="ElementHandle.PressAsync(string, PressOptions)"/>203        /// </remarks>204        /// <example>205        /// <code>206        /// elementHandle.TypeAsync("#mytextarea", "Hello"); // Types instantly207        /// elementHandle.TypeAsync("#mytextarea", "World", new TypeOptions { Delay = 100 }); // Types slower, like a user208        /// </code>209        /// An example of typing into a text field and then submitting the form:210        /// <code>211        /// var elementHandle = await page.GetElementAsync("input");212        /// await elementHandle.TypeAsync("some text");213        /// await elementHandle.PressAsync("Enter");214        /// </code>215        /// </example>216        /// <returns>Task</returns>217        public async Task TypeAsync(string text, TypeOptions options = null)218        {219            await FocusAsync().ConfigureAwait(false);220            await Page.Keyboard.TypeAsync(text, options).ConfigureAwait(false);221        }222        /// <summary>223        /// Focuses the element, and then uses <see cref="Keyboard.DownAsync(string, DownOptions)"/> and <see cref="Keyboard.UpAsync(string)"/>.224        /// </summary>225        /// <param name="key">Name of key to press, such as <c>ArrowLeft</c>. See <see cref="KeyDefinitions"/> for a list of all key names.</param>226        /// <param name="options">press options</param>227        /// <remarks>228        /// If <c>key</c> is a single character and no modifier keys besides <c>Shift</c> are being held down, a <c>keypress</c>/<c>input</c> event will also be generated. The <see cref="DownOptions.Text"/> option can be specified to force an input event to be generated.229        /// </remarks>230        /// <returns></returns>231        public async Task PressAsync(string key, PressOptions options = null)232        {233            await FocusAsync().ConfigureAwait(false);234            await Page.Keyboard.PressAsync(key, options).ConfigureAwait(false);235        }236        /// <summary>237        /// The method runs <c>element.querySelector</c> within the page. If no element matches the selector, the return value resolve to <c>null</c>.238        /// </summary>239        /// <param name="selector">A selector to query element for</param>240        /// <returns>Task which resolves to <see cref="ElementHandle"/> pointing to the frame element</returns>241        public async Task<ElementHandle> QuerySelectorAsync(string selector)242        {243            var handle = await ExecutionContext.EvaluateFunctionHandleAsync(244                "(element, selector) => element.querySelector(selector)",245                this, selector).ConfigureAwait(false);246            if (handle is ElementHandle element)247            {...

DOMWorld.cs

Source:DOMWorld.cs

...262            }263            await handle.HoverAsync().ConfigureAwait(false);264            await handle.DisposeAsync().ConfigureAwait(false);265        }266        internal async Task FocusAsync(string selector)267        {268            var handle = await QuerySelectorAsync(selector).ConfigureAwait(false);269            if (handle == null)270            {271                throw new SelectorException($"No node found for selector: {selector}", selector);272            }273            await handle.FocusAsync().ConfigureAwait(false);274            await handle.DisposeAsync().ConfigureAwait(false);275        }276        internal async Task<string[]> SelectAsync(string selector, params string[] values)277        {278            if (!((await QuerySelectorAsync(selector).ConfigureAwait(false)) is ElementHandle handle))279            {280                throw new SelectorException($"No node found for selector: {selector}", selector);281            }282            var result = await handle.SelectAsync(values).ConfigureAwait(false);283            await handle.DisposeAsync();284            return result;285        }286        internal async Task TapAsync(string selector)287        {...

PuppeteerExtensions.cs

Source:PuppeteerExtensions.cs

...193        {194            ElementHandle element;195            while (true)196            {197                await page.FocusAsync(selector);198                await page.Keyboard.DownAsync("Control");199                await page.Keyboard.PressAsync("A");200                await page.Keyboard.UpAsync("Control");201                await page.Keyboard.PressAsync("Backspace");202                await page.Keyboard.TypeAsync(text, options);203                element = await page.QuerySelectorAsync(selector);204                if (element != null)205                {206                    var value = await page.GetValueAsync(selector);207                    if (value != text)208                        continue;209                }210                return;211            }...

LinzNetz.cs

Source:LinzNetz.cs

...104    }105    private static async Task SetDate(Page page, string date, string id, bool disableJavascript) {106        // disable some javascript needed to avoid weird value flickering107        if (disableJavascript) await page.SetJavaScriptEnabledAsync(false);108        await page.FocusAsync($"#{id}");109        for (int i = 0; i < 10; i++) {110            await page.Keyboard.PressAsync("Delete");111        }112        await page.TypeAsync($"#{id}", date);113        if (disableJavascript) await page.SetJavaScriptEnabledAsync(true);114        // trigger onblur event, otherwise date is not accepted115        await page.EvaluateExpressionAsync($"document.getElementById('{id}').blur()");116    }117    public void PrintBaseInfo() {118        Console.WriteLine(BaseInfo);119        foreach (var anlage in BaseInfo.anlagen) {120            Console.WriteLine(anlage);121        }122    }123    private static async Task NavigateToConsumption(Page page) {124        Console.WriteLine("go to Verbrauchsdateninformation");125        // go to Verbrauchsdateninformation:126        await page.WaitForSelectorAsync("#j_idt932");127        await page.ClickAsync("#j_idt932");128        // click again129        await page.WaitForSelectorAsync("#j_idt932");130        await page.ClickAsync("#j_idt932");131        await page.WaitForSelectorAsync("h1");132    }133    private static async Task Login(string username, string password, Page page) {134        Console.WriteLine("enter credentials");135        await page.WaitForSelectorAsync("#username");136        await page.FocusAsync("#username");137        await page.Keyboard.TypeAsync(username);138        await page.WaitForSelectorAsync("#password");139        await page.FocusAsync("#password");140        await page.Keyboard.TypeAsync(password);141        Console.WriteLine("click login submit");142        await page.WaitForSelectorAsync("form .netz-btn--primary");143        await page.ClickAsync("form .netz-btn--primary");144        Console.WriteLine("login done!");145    }146    private static async Task NavigateToLogin(Page page) {147        await page.GoToAsync("https://www.linznetz.at/portal/de/home");148        Console.WriteLine("go to login page");149        await page.WaitForSelectorAsync(".netz-login-link");150        await page.ClickAsync(".netz-login-link");151    }152    private void CleanupDownloads(DirectoryInfo downloadDir) {153        downloadDir.Delete(true);...

Form1.cs

Source:Form1.cs

...153        //}154        //public async Task FocusElement_ByCssSelector(string selector)155        //{156        //    if (usingFrame)157        //        await frame.FocusAsync(selector);158        //    else159        //        await page.FocusAsync(selector);160        //}161        //public async Task TypeText_ByCssSelector(string selector, string val)162        //{163        //    if (usingFrame)164        //        await frame.TypeAsync(selector, val);165        //    else166        //        await page.TypeAsync(selector, val);167        //}168        //public async Task Click_ByCssSelector(string selector)169        //{170        //    if (usingFrame)171        //        await frame.ClickAsync(selector);172        //    else173        //        await page.ClickAsync(selector);...

Program.cs

Source:Program.cs

...117            Console.WriteLine(e.Request.Url);118        }119        private static async Task TypeFieldValue(Page page, string fieldSelector, string value, int delay = 0)120        {121            await page.FocusAsync(fieldSelector);122            await page.TypeAsync(fieldSelector, value, new TypeOptions { Delay = delay });123            await page.Keyboard.PressAsync("Tab");124        }125        private static async Task TypeFieldValueSearch(Page page, string fieldSelector, string value, int delay = 0)126        {127            await page.FocusAsync(fieldSelector);128            await page.TypeAsync(fieldSelector, value, new TypeOptions { Delay = delay });129        }130    }131    public class Data132    {133        public string author { get; set; }134        public string posttext { get; set; }135    }136    public class Content137    {138        public string content { get; set; }139    }140}...

Chromium.cs

Source:Chromium.cs

...27        public async Task InputSelectorAsync (Page page, string selector, string dataInput, ILogger log) {28            try {29                log.LogInformation ("Begin - InputSelectorAsync()");30                await page.WaitForSelectorAsync (selector);31                await page.FocusAsync (selector);32                await page.Keyboard.TypeAsync (dataInput);33                log.LogInformation ("End - InputSelectorAsync()");34            } catch (Exception ex) {35                log.LogError ("Erro: {0}", ex.Message);36            }37        }38        public async Task ClickSelectorAsync (Page page, string selector, bool WaitForNavigation, ILogger log) {39            try {40                log.LogInformation ("Begin - ClickSelectorAsync()");41                await page.ClickAsync (selector);42                if (WaitForNavigation) {43                    await page.WaitForNavigationAsync (new NavigationOptions { WaitUntil = new [] { WaitUntilNavigation.Load }, Timeout = 4000 });44                }45                log.LogInformation ("End - ClickSelectorAsync()");...

SelectorException.cs

Source:SelectorException.cs

...8    /// <seealso cref="Frame.SelectAsync(string, string[])"/>9    /// <seealso cref="Page.ClickAsync(string, Input.ClickOptions)"/>10    /// <seealso cref="Page.TapAsync(string)"/>11    /// <seealso cref="Page.HoverAsync(string)"/>12    /// <seealso cref="Page.FocusAsync(string)"/>13    /// <seealso cref="Page.SelectAsync(string, string[])"/>14    [Serializable]15    public class SelectorException : PuppeteerException16    {17        /// <summary>18        /// Gets the selector.19        /// </summary>20        /// <value>The selector.</value>21        public string Selector { get; }22        /// <summary>23        /// Initializes a new instance of the <see cref="SelectorException"/> class.24        /// </summary>25        /// <param name="message">Message.</param>26        public SelectorException(string message) : base(message)...

FocusAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static async Task Main(string[] args)7        {8            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9            using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions10            {11            }))12            {13                var page = await browser.NewPageAsync();14                var element = await page.QuerySelectorAsync("#searchInput");15                await element.FocusAsync();16            }17        }18    }19}

FocusAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static async Task Main(string[] args)7        {8            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9            using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }))10            {11                var page = await browser.NewPageAsync();12                var searchBox = await page.QuerySelectorAsync("input[name='q']");13                await searchBox.FocusAsync();14                await page.Keyboard.TypeAsync("puppeteer-sharp");15                await page.Keyboard.PressAsync("Enter");16                await Task.Delay(1000);17                await page.ScreenshotAsync("google.png");18            }19        }20    }21}

FocusAsync

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 searchBox = await page.QuerySelectorAsync("input[name='q']");11            await searchBox.FocusAsync();12            await page.Keyboard.TypeAsync("Hello World!");13            await page.ScreenshotAsync("1.png");14            await browser.CloseAsync();15        }16    }17}

FocusAsync

Using AI Code Generation

1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9            var browser = await Puppeteer.LaunchAsync(new LaunchOptions10            {11            });12            var page = await browser.NewPageAsync();13            var inputElement = await page.QuerySelectorAsync("input");14            await inputElement.FocusAsync();15            await page.Keyboard.TypeAsync("Hello World");16            await Task.Delay(5000);17            await browser.CloseAsync();18        }19    }20}

FocusAsync

Using AI Code Generation

1var page = await browser.NewPageAsync();2var searchBox = await page.QuerySelectorAsync("input[name='q']");3await searchBox.FocusAsync();4await page.Keyboard.TypeAsync("Hello World");5await page.Keyboard.PressAsync("Enter");6var page = await browser.NewPageAsync();7var searchBox = await page.QuerySelectorAsync("input[name='q']");8await searchBox.FocusAsync();9await page.Keyboard.TypeAsync("Hello World");10await page.Keyboard.PressAsync("Enter");11var page = await browser.NewPageAsync();12var searchBox = await page.QuerySelectorAsync("input[name='q']");13await searchBox.FocusAsync();14await page.Keyboard.TypeAsync("Hello World");15await page.Keyboard.PressAsync("Enter");16var page = await browser.NewPageAsync();17var searchBox = await page.QuerySelectorAsync("input[name='q']");18await searchBox.FocusAsync();19await page.Keyboard.TypeAsync("Hello World");20await page.Keyboard.PressAsync("Enter");21var page = await browser.NewPageAsync();22var searchBox = await page.QuerySelectorAsync("input[name='q']");23await searchBox.FocusAsync();24await page.Keyboard.TypeAsync("Hello World");25await page.Keyboard.PressAsync("Enter");26var page = await browser.NewPageAsync();27var searchBox = await page.QuerySelectorAsync("input[name='q']");28await searchBox.FocusAsync();29await page.Keyboard.TypeAsync("Hello World");30await page.Keyboard.PressAsync("Enter");

FocusAsync

Using AI Code Generation

1var page = await browser.NewPageAsync();2var searchElement = await page.QuerySelectorAsync("input[title='Search']");3await searchElement.FocusAsync();4var page = await browser.NewPageAsync();5await page.FocusAsync("input[title='Search']");6var page = await browser.NewPageAsync();7var frame = page.MainFrame;8await frame.FocusAsync("input[title='Search']");9var page = await browser.NewPageAsync();10var searchElement = await page.QuerySelectorAsync("input[title='Search']");11await searchElement.FocusAsync();12var page = await browser.NewPageAsync();13await page.FocusAsync("input[title='Search']");14var page = await browser.NewPageAsync();15var frame = page.MainFrame;16await frame.FocusAsync("input[title='Search']");17var page = await browser.NewPageAsync();18var searchElement = await page.QuerySelectorAsync("input[title='Search']");19await searchElement.FocusAsync();20var page = await browser.NewPageAsync();21await page.FocusAsync("input[title='Search']");22var page = await browser.NewPageAsync();

FocusAsync

Using AI Code Generation

1await page.FocusAsync("input[name='q']");2await page.FocusAsync("input[name='q']");3await page.QuerySelectorAsync("input[name='q']").FocusAsync();4await page.QuerySelectorAsync("input[name='q']").FocusAsync();5await page.QuerySelectorAsync("input[name='q']").FocusAsync();6await page.FocusAsync("input[name='q']");7await page.QuerySelectorAsync("input[name='q']").FocusAsync();8await page.QuerySelectorAsync("input[name='q']").FocusAsync();9await page.QuerySelectorAsync("input[name='q']").FocusAsync();10await page.QuerySelectorAsync("input[name='q']").FocusAsync();11await page.QuerySelectorAsync("input[name='q']").FocusAsync();12await page.QuerySelectorAsync("input[name='q']").FocusAsync();13await page.QuerySelectorAsync("input[name='q']").FocusAsync();14await page.QuerySelectorAsync("input[name='q']").FocusAsync();15await page.QuerySelectorAsync("input[name='q']").FocusAsync();

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