Join the 1-day Testing & QA Summit featuring 15+ Expert Speakers.Register for FREE! Join TestMu Conference

How to use PageEvalOnSelectorOptions class of Microsoft.Playwright package

Best Playwright-dotnet code snippet using Microsoft.Playwright.PageEvalOnSelectorOptions

IPage.cs

Source:IPage.cs

...578        /// expression.579        /// </param>580        /// <param name="arg">Optional argument to pass to <paramref name="expression"/>.</param>581        /// <param name="options">Call options</param>582        Task<T> EvalOnSelectorAsync<T>(string selector, string expression, object? arg = default, PageEvalOnSelectorOptions? options = default);583        /// <summary>584        /// <para>585        /// The method finds all elements matching the specified selector within the page and586        /// passes an array of matched elements as a first argument to <paramref name="expression"/>.587        /// Returns the result of <paramref name="expression"/> invocation.588        /// </para>589        /// <para>590        /// If <paramref name="expression"/> returns a <see cref="Task"/>, then <see cref="IPage.EvalOnSelectorAllAsync"/>591        /// would wait for the promise to resolve and return its value.592        /// </para>593        /// <para>Examples:</para>594        /// <code>var divsCount = await page.EvalOnSelectorAllAsync&lt;bool&gt;("div", "(divs, min) =&gt; divs.length &gt;= min", 10);</code>595        /// </summary>596        /// <remarks>...

PageSynchronous.cs

Source:PageSynchronous.cs

...1407    /// expression.1408    /// </param>1409    /// <param name="arg">Optional argument to pass to <paramref name="expression"/>.</param>1410    /// <param name="options">Call options</param>1411    public static T EvalOnSelector<T>(this IPage page, string selector, string expression, object? arg = null, PageEvalOnSelectorOptions? options = null)1412    {1413        var result = page.EvalOnSelectorAsync<T>(selector, expression, arg, options).GetAwaiter().GetResult();1414        return result;1415    }1416    /// <summary>1417    /// <para>1418    /// The method finds all elements matching the specified selector within the page and1419    /// passes an array of matched elements as a first argument to <paramref name="expression"/>.1420    /// Returns the result of <paramref name="expression"/> invocation.1421    /// </para>1422    /// <para>1423    /// If <paramref name="expression"/> returns a <see cref="Task"/>, then <see cref="IPage.EvalOnSelectorAllAsync"/>1424    /// would wait for the promise to resolve and return its value.1425    /// </para>...

Page.cs

Source:Page.cs

...362            }363        }364        public Task<T> EvaluateAsync<T>(string expression, object arg) => MainFrame.EvaluateAsync<T>(expression, arg);365        public Task<JsonElement?> EvalOnSelectorAsync(string selector, string expression, object arg) => MainFrame.EvalOnSelectorAsync(selector, expression, arg);366        public Task<T> EvalOnSelectorAsync<T>(string selector, string expression, object arg = null, PageEvalOnSelectorOptions options = null)367            => MainFrame.EvalOnSelectorAsync<T>(selector, expression, arg, new() { Strict = options?.Strict });368        public ILocator Locator(string selector, PageLocatorOptions options = default)369            => MainFrame.Locator(selector, new() { HasTextString = options?.HasTextString, HasTextRegex = options?.HasTextRegex, Has = options?.Has });370        public Task<IElementHandle> QuerySelectorAsync(string selector, PageQuerySelectorOptions options = null)371            => MainFrame.QuerySelectorAsync(selector, new() { Strict = options?.Strict });372        public Task<T> EvalOnSelectorAsync<T>(string selector, string expression, object arg) => MainFrame.EvalOnSelectorAsync<T>(selector, expression, arg);373        public Task<JsonElement?> EvalOnSelectorAllAsync(string selector, string expression, object arg) => MainFrame.EvalOnSelectorAllAsync(selector, expression, arg);374        public Task<T> EvalOnSelectorAllAsync<T>(string selector, string expression, object arg) => MainFrame.EvalOnSelectorAllAsync<T>(selector, expression, arg);375        public Task FillAsync(string selector, string value, PageFillOptions options = default)376            => MainFrame.FillAsync(selector, value, new() { NoWaitAfter = options?.NoWaitAfter, Timeout = options?.Timeout, Force = options?.Force, Strict = options?.Strict });377        public Task SetInputFilesAsync(string selector, string files, PageSetInputFilesOptions options = default)378            => MainFrame.SetInputFilesAsync(selector, files, Map(options));379        public Task SetInputFilesAsync(string selector, IEnumerable<string> files, PageSetInputFilesOptions options = default)380            => MainFrame.SetInputFilesAsync(selector, files, Map(options));...

PageModel.cs

Source:PageModel.cs

...294    protected virtual void EvalOnSelector(string selector, string expression, object? arg = null)295    {296        this.Page.EvalOnSelector(selector, expression, arg);297    }298    protected virtual void EvalOnSelector<T>(string selector, string expression, object? arg = null, PageEvalOnSelectorOptions? options = null)299    {300        this.Page.EvalOnSelector<T>(selector, expression, arg, options);301    }302    protected virtual void Evaluate(string expression, object? arg = null)303    {304        this.Page.Evaluate(expression, arg);305    }306    protected virtual void Evaluate<T>(string expression, object? arg = null)307    {308        this.Page.Evaluate<T>(expression, arg);309    }310    protected virtual void EvaluateHandle(string expression, object? arg = null)311    {312        this.Page.EvaluateHandle(expression, arg);...

PageEvalOnSelectorOptions.cs

Source:PageEvalOnSelectorOptions.cs

...35using System.Threading.Tasks;36#nullable enable37namespace Microsoft.Playwright38{39    public class PageEvalOnSelectorOptions40    {41        public PageEvalOnSelectorOptions() { }42        public PageEvalOnSelectorOptions(PageEvalOnSelectorOptions clone)43        {44            if (clone == null)45            {46                return;47            }48            Strict = clone.Strict;49        }50        /// <summary>51        /// <para>52        /// When true, the call requires selector to resolve to a single element. If given selector53        /// resolves to more then one element, the call throws an exception.54        /// </para>55        /// </summary>56        [JsonPropertyName("strict")]...

PageEvalOnSelectorOptions

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Playwright;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            await using var browser = await playwright.Chromium.LaunchAsync(new LaunchOptions10            {11            });12            var context = await browser.NewContextAsync();13            var page = await context.NewPageAsync();14            await page.TypeAsync("input[type=\"text\"]", "playwright");15            await page.ClickAsync("input[type=\"submit\"]");16            await page.ClickAsync("text=Playwright");17            await page.ClickAsync("text=Docs");18            await page.ClickAsync("text=API Reference");19            await page.ClickAsync("text=Page");20            await page.ClickAsync("text=Page.evaluateOnSelectorAll");21            await page.ClickAsync("text=Parameters");22            await page.ClickAsync("text=selector");23            await page.ClickAsync("text=Function to be evaluated in browser context");

PageEvalOnSelectorOptions

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Playwright;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            await using var browser = await playwright.Chromium.LaunchAsync(headless: false);10            var context = await browser.NewContextAsync();11            var page = await context.NewPageAsync();12            await page.ClickAsync("input[name=q]");13            await page.TypeAsync("input[name=q]", "playwright");14            await page.ClickAsync("text=Search");15            await page.WaitForLoadStateAsync(LoadState.NetworkIdle);16            {17            };18            var result = await page.EvalOnSelectorAsync<string>("text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API", "el => el.textContent", pageEvalOnSelectorOptions);19            Console.WriteLine(result);20        }21    }22}23using System;24using System.Threading.Tasks;25using Microsoft.Playwright;26{27    {28        static async Task Main(string[] args)29        {30            using var playwright = await Playwright.CreateAsync();31            await using var browser = await playwright.Chromium.LaunchAsync(headless: false);32            var context = await browser.NewContextAsync();33            var page = await context.NewPageAsync();34            await page.ClickAsync("input[name=q]");35            await page.TypeAsync("input[name=q]", "playwright");36            await page.ClickAsync("text=Search");37            await page.WaitForLoadStateAsync(LoadState.NetworkIdle);38            {39            };40            var result = await page.EvalOnSelectorAllAsync<string>("text=Playwright is a Node library to automate Chromium, Firefox and WebKit with a single API", "el => el.textContent", pageEvalOnSelectorAllOptions);41            Console.WriteLine(result);42        }43    }44}

PageEvalOnSelectorOptions

Using AI Code Generation

1using Microsoft.Playwright;2using System.Threading.Tasks;3{4    {5        static async Task Main(string[] args)6        {7            using var playwright = await Playwright.CreateAsync();8            await using var browser = await playwright.Chromium.LaunchAsync();9            var context = await browser.NewContextAsync();10            var page = await context.NewPageAsync();11            await page.ClickAsync("text=Images");12            await page.ClickAsync("text=Maps");13            await page.ClickAsync("text=News");14            await page.ClickAsync("text=Videos");15            await page.ClickAsync("text=Shopping");16            await page.ClickAsync("text=Books");17            await page.ClickAsync("text=Flights");18            await page.ClickAsync("text=Finance");19            await page.ClickAsync("text=More");20            await page.ClickAsync("text=About");21            await page.ClickAsync("text=How Search works");22            await page.ClickAsync("text=Privacy");23            await page.ClickAsync("text=Terms");24            await page.ClickAsync("text=Settings");25            await page.ClickAsync("text=Advertising");26            await page.ClickAsync("text=Business");27            await page.ClickAsync("text=How Search works");28            await page.ClickAsync("text=Privacy");29            await page.ClickAsync("text=Terms");30            await page.ClickAsync("text=Settings");31            await page.ClickAsync("text=Advertising");32            await page.ClickAsync("text=Business");33            await page.ClickAsync("text=About");34            await page.ClickAsync("text=How Search works");35            await page.ClickAsync("text=Privacy");36            await page.ClickAsync("text=Terms");37            await page.ClickAsync("text=Settings");38            await page.ClickAsync("text=Advertising");39            await page.ClickAsync("text=Business");40            await page.ClickAsync("text=About");41            await page.ClickAsync("text=How Search works");42            await page.ClickAsync("text=Privacy");43            await page.ClickAsync("text=Terms");44            await page.ClickAsync("text=Settings");45            await page.ClickAsync("text=Advertising");46            await page.ClickAsync("text=Business");47            await page.ClickAsync("text=About");48            await page.ClickAsync("text=How Search works");49            await page.ClickAsync("text=Privacy");50            await page.ClickAsync("

PageEvalOnSelectorOptions

Using AI Code Generation

1using Microsoft.Playwright;2using Microsoft.Playwright.Helpers;3using System;4using System.Collections.Generic;5using System.Linq;6using System.Text;7using System.Threading.Tasks;8{9    {10        static async Task Main(string[] args)11        {12            await using var playwright = await Playwright.CreateAsync();13            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions { Headless = false });14            var context = await browser.NewContextAsync(new BrowserNewContextOptions { ViewportSize = new ViewportSize { Width = 1920, Height = 1080 } });15            var page = await context.NewPageAsync();16            await page.TypeAsync("input[title='Search']", "Playwright");17            await page.PressAsync("input[title='Search']", "Enter");18            await page.WaitForSelectorAsync("text=Playwright: Node.js library to automate Chromium, Firefox and WebKit with a single API");19            var pageEvalOnSelectorOptions = new PageEvalOnSelectorOptions { Timeout = 1000 };20            var result = await page.EvalOnSelectorAsync<string>("text=Playwright: Node.js library to automate Chromium, Firefox and WebKit with a single API", "element => element.textContent", pageEvalOnSelectorOptions);21            Console.WriteLine(result);22            await page.CloseAsync();23            await context.CloseAsync();24            await browser.CloseAsync();25        }26    }27}

PageEvalOnSelectorOptions

Using AI Code Generation

1using Microsoft.Playwright;2using System;3{4    {5        static async System.Threading.Tasks.Task Main(string[] args)6        {7            using var playwright = await Playwright.CreateAsync();8            await using var browser = await playwright.Chromium.LaunchAsync();9            var page = await browser.NewPageAsync();10            await page.TypeAsync("input[aria-label='Search']", "Hello World");11            await page.PressAsync("input[aria-label='Search']", "Enter");12            await page.ScreenshotAsync("example.png");13            await browser.CloseAsync();14        }15    }16}17using Microsoft.Playwright;18using System;19{20    {21        static async System.Threading.Tasks.Task Main(string[] args)22        {23            using var playwright = await Playwright.CreateAsync();24            await using var browser = await playwright.Chromium.LaunchAsync();25            var page = await browser.NewPageAsync();26            await page.TypeAsync("input[aria-label='Search']", "Hello World");27            await page.PressAsync("input[aria-label='Search']", "Enter");28            await page.ScreenshotAsync("example.png");29            await browser.CloseAsync();30        }31    }32}33using Microsoft.Playwright;34using System;35{36    {37        static async System.Threading.Tasks.Task Main(string[] args)38        {39            using var playwright = await Playwright.CreateAsync();40            await using var browser = await playwright.Chromium.LaunchAsync();41            var page = await browser.NewPageAsync();42            await page.TypeAsync("input[aria-label='Search']", "Hello World");43            await page.PressAsync("input[aria-label='Search']", "Enter");44            await page.ScreenshotAsync("example.png");45            await browser.CloseAsync();46        }47    }48}49using Microsoft.Playwright;50using System;51{

PageEvalOnSelectorOptions

Using AI Code Generation

1using Microsoft.Playwright;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions10            {11            });12            var context = await browser.NewContextAsync();13            var page = await context.NewPageAsync();14            await page.TypeAsync("input[name='q']", "Hello World!");15            await page.ClickAsync("input[value='Google Search']");16            await page.WaitForLoadStateAsync(LoadState.DOMContentLoaded);17            await page.ClickAsync("input[value='Feeling Lucky']");18            await page.WaitForLoadStateAsync(LoadState.DOMContentLoaded);19            {20            };21            var result = await page.EvalOnSelectorAsync<string>("input[name='q']", "e => e.value", pageEvalOnSelectorOptions);22            Console.WriteLine(result);23            Console.ReadLine();24        }25    }26}27Playwright: How to use Page.EvalOnSelectorAsync() method to evaluate the selector options28Playwright: How to use Page.EvalOnSelectorAllAsync() method to evaluate the selector options29Playwright: How to use Page.EvalOnSelectorAllAsync() method to evaluate the selector options30Playwright: How to use Page.EvalOnSelectorAsync() method to evaluate the selector options31Playwright: How to use Page.EvalOnSelectorAllAsync() method to evaluate the selector options32Playwright: How to use Page.EvalOnSelectorAllAsync() method to evaluate the selector options33Playwright: How to use Page.EvalOnSelectorAsync() method to evaluate the selector options34Playwright: How to use Page.EvalOnSelectorAsync() method to evaluate the selector options35Playwright: How to use Page.EvalOnSelectorAllAsync() method to evaluate the selector options36Playwright: How to use Page.EvalOnSelectorAllAsync() method to evaluate the selector options37Playwright: How to use Page.EvalOnSelectorAsync() method to evaluate the selector options

PageEvalOnSelectorOptions

Using AI Code Generation

1var playwright = await Playwright.CreateAsync();2var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions3{4});5var context = await browser.NewContextAsync();6var page = await context.NewPageAsync();7await page.ClickAsync("text=HTML");8await page.EvalOnSelectorAsync("select", "select => select.options");9await browser.CloseAsync();10var playwright = await Playwright.CreateAsync();11var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions12{13});14var context = await browser.NewContextAsync();15var page = await context.NewPageAsync();16await page.ClickAsync("text=HTML");17await page.EvalOnSelectorAllAsync("select", "select => select.options");18await browser.CloseAsync();19var playwright = await Playwright.CreateAsync();20var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions21{22});23var context = await browser.NewContextAsync();24var page = await context.NewPageAsync();25await page.ClickAsync("text=HTML");26await page.EvaluateHandleAsync("select => select.options", await page.QuerySelectorAsync("select"));27await browser.CloseAsync();28var playwright = await Playwright.CreateAsync();29var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions30{31});

PageEvalOnSelectorOptions

Using AI Code Generation

1using Microsoft.Playwright;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            Console.WriteLine("Hello World!");9            using var playwright = await Playwright.CreateAsync();10            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions11            {12            });13            var context = await browser.NewContextAsync();14            var page = await context.NewPageAsync();15            await page.SwitchToFrameAsync("iframeResult");16            await page.SelectOptionAsync("select", new PageSelectOptionOptions17            {18            });19            var selectedOption = await page.EvalOnSelectorAsync<string>("select", "(select) => select.value");20            Console.WriteLine($"selected option: {selectedOption}");21        }22    }23}24using Microsoft.Playwright;25using System;26using System.Threading.Tasks;27{28    {29        static async Task Main(string[] args)30        {31            Console.WriteLine("Hello World!");32            using var playwright = await Playwright.CreateAsync();33            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions34            {35            });36            var context = await browser.NewContextAsync();37            var page = await context.NewPageAsync();

PageEvalOnSelectorOptions

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using Microsoft.Playwright;4using Microsoft.Playwright.Helpers;5using Microsoft.Playwright.Transport.Channels;6{7    {8        static async Task Main(string[] args)9        {10            using var playwright = await Playwright.CreateAsync();11            await using var browser = await playwright.Chromium.LaunchAsync(new LaunchOptions12            {13            });14            var page = await browser.NewPageAsync();15            var text = await page.EvalOnSelectorAsync<string>("#tsf > div:nth-child(2) > div > div.RNNXgb > div > div.a4bIc > input", "element => element.value");16            Console.WriteLine(text);17        }18    }19}20var text = await page.EvalOnSelectorAsync<string>("#tsf > div:nth-child(2) > div > div.RNNXgb > div > div.a4bIc > input", "element => element.value");21var text = await page.QuerySelectorAsync("#tsf > div:nth-child(2) > div > div.RNNXgb > div > div.a4bIc > input");22Console.WriteLine(text);23var text = await page.EvalOnSelectorAsync<string>("#tsf > div:nth-child(2) > div > div.RNNXgb > div > div.a4bIc > input", "element => element.value");24var text = await page.QuerySelectorAsync("#tsf > div:nth-child(2) > div > div.RNNXgb > div > div.a4

Playwright tutorial

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

Chapters:

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