Puppeteer element evaluate This can be useful for interacting with the DOM (Document Object Model) or extracting information The page. evaluate(async => { // await some promise }); Is there an equivalent in PuppeteerSharp? Using EvaluateFunctionAsync, the task completes before the promise resolves: await page. evaluate or do everything in puppeteer context. evaluate(el => el. bxPAYd > div > div. evaluate(() => [document. // Runs the `//h2` as the XPath expression. In Puppeteer, page. $("#myElement"); const html = element. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog I have to fill out a form that is inside an iframe, here the sample page. png' }); Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. The function in evaluate will be evaluated in the page context so either: Use setTimeout(): page. evaluate() doesn't work: The better way would be to execute the code on the page via page. Commands tag, at, size, and click all want to operate on the current elementHandle they are not interested by which means the elementHandle was obtained. The reason the click() method appears to work is that it is available in both contexts, as a native DOM method and a Puppeteer element handle method. puppeteer cannot find element. newPage(); page. Finally we print the text. To access the computed styles of an element, you can utilize the page. Here's a simple Overview: This is not the actual problem but I have simplified the problem and converted it into a more understandable one. js module. 11. In Puppeteer, it’s often necessary to inspect and manipulate the visual properties of web elements, such as their colors, dimensions and positioning. utils; await puppeteer. How do i return a value from page. evaluate not running console. className, element); console. The actual DOM elements are not sent to the Node. form-control" To see console. item-sku-image a"); variants. Have the process run in a loop. 23. The following code is just what I produced to test the idea, I'm sure there's significant room for improvement. Return the new status value. log(location); With regard to this part of your question "Or even better; how to click an element with a specific innerHTML. evaluate(() => { let elem; // First, it is important to understand that there are two main environments: Node. querySelector doesn't work with child elements in puppeteer. evaluate? 1. evaluate? One glitch I ran into that was non-obvious to me: It looks like Promise. evaluate to retrieve the innerText string. For getting css selector for the element you can use the code from an answer to this question: const elemToClick = page. If the given function returns a promise, then this method will wait till the promise resolves. jsonValue() is pure Node Puppeteer, yet you're attempting to run that inside the browser console. click hangs forever. innerText); But undefined is logged. I retrieve an HTML element with an XPath selector and need to extract the text property. Let's explore an example Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company For example, I found most of the time the evaluate click would work but not on the third-party ecommerce payment gateway. 1 CSS selectors can be passed as-is and a Puppeteer-specific selector syntax allows quering by text, a11y role and name, and xpath and combining With regards to XPath specifically, most relevant to pre-18. Puppeteer - get parent element. evaluate can return Element and it does in my example. When using Puppeteer for web automation, selecting and interacting with page elements efficiently and reliably is crucial. ck6P8 > div > div contains a certain set of characters (•••). That means when you want to get an attribute from an element, there has to be data transferred to the browser (which DOM element to use) and back (the result). Puppeteer QuerySelector Cannot read solved it. evaluate. const title = await page . Add a comment | Your Answer puppeteer cannot find element. some-class"); // for ids you can write "#some-id" const className = await page. Puppeteer returning undefined (JS) using xPath. How are you sure? If you're verifying the form's presence by looking at the developer tools, that's no guarantee that the element wasn't added dynamically via JS after the page. I found some answers about this issue in stackoverflow but none of them worked. Then I just call DOM. evaluate? 2. Puppeteer not able to get Runs the given function on the first element matching the given selector in the current element. Change element style dynamically with puppeteer. Puppeteer page. evaluate returns a non-Serializable value, then page. Currently I use: // Get the element let ele = await elem I need a way to add some delay between clicking elements inside a page. I'm pretty new to coding so any help would be greatly appreciated. js (Puppeteer) Environment; Page DOM Environment; You should use page. To retrieve the text content of an element using Puppeteer, you can utilize the evaluate method on an element handle. Return a complex object from page. If a certain element is currently interactive and visible, we say it is active. evaluateHandle is for returning in-page elements, since you're returning an array of text and it's serializable, you don't need it. Cannot get querySelectorAll to work with puppeteer (returns undefined) 0. for(c in cs) console. evaluate method to execute JavaScript code within the page context. Skip to main content. I am unable to return the result from page. WEQkZc > div > form > content > section > div > content > div. I am currently looking at re-implementing the language on top of puppeteer. selector-list li"); // do something with elements, like mapping elements to an attribute: return const cii = await page. Both were different contexts and have it's own environment, and you can't share variables or constants. If you need to pass DOM elements to the function, the first method is the way to go. The code works in devtools console, but not in my Node app. Yet, when I open the console in the launched browser and manually type const btn = document. This method allows you to execute JavaScript within the context of the page and extract the desired text. JS Puppeteer API. And you can't call div. 0 Puppeteer: Since OP's use case appears to be an exact match on the target string "Button text", <button>Button text</button>, text() seems like the correct method rather than the less-precise contains(). js environment. Which you can work-around using a sufficiently loose XPath query with Puppeteer v1. The element might even I am new to Puppeteer, and I am trying to extract meta data from a Web site using Node. I am trying to get a value from inside page. evaluate() 2. evaluate querySelectorAll is always empty. (From the docs - the visible option causes puppeteer to wait for element to be present in DOM and to be visible. Try Teams for free Explore Teams Usually you first query a DOM element using a CSS selector and then invoke an action on the selected element. Puppeteer Docs Puppeteer API @puppeteer/browsers API. Puppeteer: pass variable in . Problem with puppeteer in Consequently, they need to be passed to other Puppeteer methods, such as evaluate(), for subsequent processing. evaluate; The selector is working as in Google Chrome developer tools it captures exactly the 3 elements I am looking for. But there doesn't seem to be to do this currently without going back to the selector Instead of checking for the condition yourself, you would wait for the element to become available. issue with puppeteer console. $(". NodeJS Puppeteer Get InnerText of Child Elements from XPath. EvaluateFunctionAsync(@"async => { // await some promise }"); Using puppeteer how do you get all child nodes of a node? Getting all styles with devtool-protocol in puppeteer Get DocType of an HTML as string with Javascript Handling events from puppeteer's page context outside evaluate method Headless Chrome ( Puppeteer ) - how to get access to document node element? When I run a puppeteer script , if I want to do a log inside the page. evaluate and return the results. I can click the selector but my question is how to select one of the options from the dropdown list? await page. If we are not interested in waiting on the element, and we would simply like to test the visibility of the element, we can use a combination of getComputedStyle() and getBoundingClientRect() to test whether or not the element is visible. waitForSelector() before attempting to scrape the textContent I prefer to use jQuery. The page. the form exists in the page and i am sure. click() on the payment page. evaluate() in puppeteer? 1. focus() and page. I just can't seem to get the syntax right. Although Thomas makes a good argument for contains when there are sub-elements, avoiding Puppeteer Sharp - Examples. waitFor in puppeteer. If in headless=false mode, both approaches work well. How to properly pass a string to page. Checking if an element exists and is active is a very common task in web scraping and Get elements from page. Documentation -If the function passed to the page. textContent); // grab the textContent from the element, by evaluating this function in the browser context This is not correct. I understand page. evaluate I can use a code like bellow. Asking for help, clarification, or responding to other answers. getProperty('innerText')). evaluate in Puppeteer? 0. Is that the case here? How can I fix it? Thanks in advance. I need to collect all h1 tags and then pop the first and last ones. puppeteer howto find element within parent element. click('#telCountryInput &gt; option:nth-child(4)') Click the option using CSS selector In the following code snippet, I try to click a button (after some Timeout) within the page. I'll add an answer to explain in detail. 1. evaluate method to run code within the context of the web page Get elements from page. evaluate method is the puppeteer function to run script INSIDE the Chromium puppeteer's browser, not in puppeteer itself. getAttribute("value"), cii); which did not work and threw TypeError: Cannot read properties of null (reading 'getAttribute') , so then I tried this: It fires the element's click event. injectJQuery(page); const location = await page. waitForSelector('your selector'); // select the element const value = await element. 1. Puppeteer: How to evaluate xpath with document. click() }); If a certain element is present in the webpage DOM, we say it exists. But then I am trying. traditional methods like $() (element handles). evaluate to query for elements. For those cases, try page. This can be done with either waitForSelector or waitForXPath . How to test puppeteer page. Share A better puppeteer evaluate For that reason I published a little library(my first) that lets me do just that: Aptly named puppeteer-evaluate2, it allows me to write my puppeteer callback code like any other JavaScript code, In Puppeteer, if you want to extract all span elements' content from a specific node, you can use the page. Instead I get Element[]. evaluate const inputContent = await page. another-element") awai The current accepted answer involves waiting for an element to appear and become visible. javascript; Monitor (mutationobserver)for text change in an element in puppeteer. sticky_footer > div:nth-child(9)'); }); javascript; puppeteer; Share. evaluateHandle method in Puppeteer allows you to execute a function within the context of the page and returns a handle to the result. evaluate in Puppeteer. Looping inside a page. Actually you were confused with the page. – barney765. const { puppeteer } = Apify. type: types a text on selector I'm trying to find out if an element #view_container > div > div > div. log('className', className) // here you can get the class name Getting style of an element. I have an element 'input[name=startdate]' with an attribute 'value="2018-06-20"' instead of using puppeteer to interact with the calendar that is used to change the date, is there anyway I can use Changing the value of a variable inside page. text())); page. textContent using waitForSelector and evaluate this becomes pretty clean. click(), element) . I didn't see an obvious/simple way to fix this In Puppeteer you can evaluate async functions: await page. 3. I will use XPath in this example. querySelector within the page. Basic Usage Take screenshots using var browserFetcher = new . evaluate() in Chrome. evaluate(() => var text = "Hi"; return text; ); In your case it looks like you're trying to return some div elements which I don't think is possible this way. Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Otherwise, use evaluate click by default. You can pass in parameters to the evaluate function to get around this. evaluate function, you will need to mimic the hover by using normal DOM mouse events. Solution Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company One of the key tasks when using Puppeteer is to locate elements so that you can then manipulate or extract values from them. querySelectorAll('img')); const To get a value using page. Obtain a In Pupeteer, I'd like to pass an arbitrary number of ElementHandle to the method evaluate in an array: const element1=await page. Using puppeteer how do you get all child nodes of a node? 4. Cannot get node property in evaluate() 14. Node. evaluate(async => { let variants = document. This is golden and you can execute any code that you can execute on your browsers console. pass multiple parameters into page. evaluate using puppeteer? 20. evaluate to run some js that adds unique classnames to every element and subelement I want analyzed and then pass that back as JSON string since page. from(document. dimensions and positioning. One extremely useful way you can do this is by using CSS Selectors. all returns a promise, which you can chain to return the value you want. evaluate does not work directly with DOM, but I follow several examples and did not succeed. text(); }); console. 2. How do I return a ElementHandle reference from page. Something like this: The method runs element. This means that if you have a 30 second timeout in waitForEvent then your puppeteer script will run for at least 30 seconds while it waits for the timeout promise to resolve even if the event fired. There are several useful APIs that can be used wisely:. innerText . js Puppeteer - Can't set HTML element inside page. click and page. log in evaluate, listen on 'console' event: const page = await browser. Commented Oct 20, 2019 at 18:23. evaluate(() => { const elements = document. That way you can return an array with values: const result = await page. Move the msg to evaluate and then return the result back to puppeteer. evaluate(() => { return $('#details-container yt-formatted-string'). I have tried with . Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Right click on your desired element and click inspect element. What's the problem. evaluate()? 7. Apparently an element has to be visible before page. log you need to: page. – Harrison Cramer. In the page. querySelector on each of those unique selectors and loop through them that way. forEach(async variant => { await new Promise(function(resolve) { setTimeout(resolve, 1000) }); await variant. evaluate I need to use page. 9. If you need to do it in the page. I try to click some element using Puppeteer, and I tried both page. evaluate Puppeteer (Javascript) 4. text . Can anyone explain to me the cause of this difference in behavior and how to fix it? Get elements from page. You can inject jQuery for example from Apify utils. querySelector('#status'). click, see code below. innerHTML . querySelectorAll(". evaluate function, you can return a promise, which will resolve to a value. The element handles are necessary as an abstraction layer between the Node. evaluate() placed inside a forof loop during every iteration of the loop. In this case Promise. querySelectorAll('input')] // or anything that you want to use normally ) Useful APIs. As noted in various sources, there are evolving best practices in how to handle these interactions, primarily through the use of locators vs. That's a common mistake -- elementHandles work only in Puppeteer. The function page. So select waits for and gets an elementHandle. " There are some particulars around innerHTML, innerText, and textContent that might give you grief. ; If in headless=true mode, page. This does not work for the page. It does not work. The thread you linked offers a bottom example that shows the evaluate approach, which uses browser-only code. Any chance you know how one would collect an array of elements using puppeteer then and then use them later then? or is it simply not possible? For example. evaluate in Puppeteer? 2. If no element matches the selector, an exception is thrown. click() it does. querySelector('#sb-site > div. waitForSelector explicitly for the element before page. I am using Puppeteer in a Node. Also the cs variable is filled with an array of three elements. Afterwards we iterate through the array of buttons and get the text using the evaluate method on the element. value . js and browser runtime. Therefore, I use a page. JS and Puppeteer. To evaluate document. e. pwWryf. Nevertheless, I settled on the solution proposed by aslushnikov here. log(consoleObj. evaluate context is separate from Puppeteer, so evaluate's msg will be undefined. on('console', consoleObj => console. type(). We can first check that the visibility is not set to hidden. Which it didn't. How can I use page inside of my page. evaluate in Puppeteer? 1. evaluate() body in my YouTube scraper that I've built using Puppeteer. If no elements match the In Puppeteer, page. This means, it does not care if the element is outside of the current viewport. . evaluate, you need to return it:. XPath selectors will use the browser's native Document. screenshot within page I'm trying to automate retrieving form values from an already filled out form with puppeteer and xpath. I tried to get the form iframe by using const formFrame = page. I ended up Get elements from page. All of Puppeteer APIs that accept a selector, accept a CSS selector by default. type() will work, whereas setting the element's value via attribute doesn't care as long as it's part of the DOM. evaluate (() => document . Example Usage. It just fires the click event, so that all handlers listening to that click event of the element are called. Commented Mar 3, 2020 at 18:01. . 0. This write-up explores these concepts, await (await element. on('console', msg => console. Defaults to false. below is what ive tried and it does not work. Puppeteer can't find the element. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company you can get the element variable and use evaluate function like that: const element = await page. evaluate() uses the browser's native document. Trouble modifying an object within page. screenshot({ path: 'element. element") const element2=await page. All you need is to pass the element to page. Another finding is that with one tab under the incognito context, the evaluate click doesn't work properly. What Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company tried code below returned Error: Evaluation failed: TypeError: Cannot read properties of undefined (reading 'add'). EDIT: So in the end I think that puppeteer couldn't serialize the children array for some reason. evaluate() Puppeteer evaluate function; allow to pass a parameterized funciton as a string to page. $$ (String selector) → Future < List < ElementHandle > > The method runs element. Puppeteer: use function inside page. if I want to iterate It can be combined with a page. Introduction. It wouldn't work for an element that was continually moving or for an element that is covered by something else. Here's a step-by-step example demonstrating how to get the text content of an element: I ended up using page. evaluate really means. My question requires the return to be an array of elements that I can then call click on. race doesn't cancel the waitForTimeout promise. evaluate(). log(msg. evaluate and then perform page. Then right click and click Copy > Copy selector This will give you a unique selector for that specific element. evaluate function provided by puppeteer. click on them. evaluate(() => { return document. Therefore, I need to use XPath, which requires to evaluate query using document. const someText = await page. I cannot access by simply using page. $("InitiationTT"); const init = await page. querySelectorAll within the page. evaluate()? 9. evaluate(() => { const fac = new FastAverageColor(); const imgs = Array. evaluate() when you are seeking to interact with the page The element is most likely being generated dynamically, so you should wait for the element with page. Next; 23. ; What I did then, is page. It'd look something like this: const returned = await page. evaluate function. $ call runs. page. querySelectorAll("form button")[1]; btn. Make Puppeteer evaluate the change in document. innerHTML; I'm expecting the HTML to be printed, but instead I'm getting undefined. ) evaluate. Implementing Puppeteer in node. To be able to see in-page console. evaluate only returns a string. evaluate works, but page. I am getting same data returned from a page. Pass a function to evaluate() in puppeteer. I've already automated FILLING a text input field as follows, but doing the reverse with . NET port of the official Node. evaluate(() => { //Code to execute before setTimeout(function() { //Code to execute after the 1000ms time delay }, 1000); }); Or write your async delay function similar to page. @MattSergejRinc it doesn't work like that - the function that you pass in is executed by the browser that Puppeteer is running, not by your script, so it doesn't have access to variables that the evaluate function is closed over. title ); This returns the document title from the puppeteer instance Additionally, Puppeteer offers custom selector syntax that allows finding elements using XPath, Text, Accessibility attributes and accessing Shadow DOM without the need to execute Learn how to use Puppeteer's evaluate function to pass objects and execute scripts in the browser context. How do I One of the key tasks when using Puppeteer is to locate elements so that you can then manipulate or extract values from them. last(). view-source: is the place to look for statically-present elements (and when JS runs, some of those elements may be changed or removed, With the second method (exposeFunction) the function executes in Node. evaluate() is a method that allows you to execute JavaScript code in the context of the page. evaluate() can only return a serializable value, so it is not possible to return an element or NodeList back from the page environment using this method. I know the common methods such as evaluate for capturing the elements in puppeteer, but I am curious why I cannot get the href attribute in a JavaScript-like approach as const page = await browser. $('#my-selector'); await element. $ is not sufficient here because querySelector does not allow :contains query. 0. evaluate method to run JavaScript code in the context of the page? I have extensive experience with Puppeteer and using its page. I guess it is due to closure, I haven't programmed in JS for long, so I could not implement IIFE with async functions. text())); Unfortunately , it does not work if I want to log an object: For example the code below does not log properly a js obj: I am trying to scrap some data with puppeteer but for some sites querySelector returns null and I have no idea what is wrong. evaluate You can return css selectors of elements you want to click from page. This is the resul I want: It appears that this is actually a very popular request and I perhaps should have searched more thoroughly before posting my question. Runs the given function on the first element matching the given selector in the current element. const result = await page. js. text())); Using page. One extremely useful way you can do this is by using CSS How to use Puppeteer’s page. const element = await page. Using Puppeteer, I would like to get all the elements on a page with a particular class name and then loop through and click each one. This can be useful for interacting with the DOM (Document Object Model) or extracting information from the page. Puppeteer , listen to network response changes. It is the best way how to query elements. Using jQuery, I can achieve this with: var elements = $("a. evaluate resolves to undefined. The class 'form-control' is on all inputs const forms = ". Puppeteer. And looks At the moment, I'm trying the following: const element = await page. I need to find a DOM node that contains a specific text. log(c. log. innerText !== statusText. This handle can be a To execute JavaScript code on your puppeteer instance, you can use the provided evaluate method. evaluate on this task. That's all it does. Puppeteer Sharp is a . g. On their documentation for evaluate it is said that: if the function passed to the page. Provide details and share your research! But avoid . gvvez vgznx dasvtw znru bbx pkco evbso xtnhrgb yqt xiubtl