Do these 3 things before closing this tab:
1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesRun JavaScript in the frame you want to target with await frame.evaluate(pageFunction, ...args). The callback executes in that frame’s browser context; pass Node.js values as arguments, and Puppeteer awaits a returned promise before sending its result back.
Run JavaScript in a frame
First select the correct Puppeteer Frame from the page, then call its evaluate() method. This example finds a frame whose URL contains /widget and reads its document title:
const frame = page.frames().find(candidate => candidate.url().includes('/widget'));
if (!frame) throw new Error('Target frame was not found');
const title = await frame.evaluate(() => document.title);
console.log(title);frame.evaluate() serializes the function and runs it in the selected frame, not in Node.js. Its result is returned to Node.js; if the function returns a promise, Puppeteer waits for it to resolve. See the Frame.evaluate() API reference and the Page.evaluate() API reference.
Select the frame you need
A page’s frame tree can change as embedded content attaches, navigates, or detaches. page.mainFrame() returns the main frame, while page.frames() returns the current frames. A frame also exposes childFrames() and parentFrame(). JavaScript evaluated in a parent frame does not automatically run in its nested child frames.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
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Find a frame by URL
When a frame’s URL is distinctive, search the current frame list and handle the possibility that it is not present yet:
const frame = page.frames().find(candidate => candidate.url().includes('/checkout'));
if (!frame) throw new Error('Checkout frame not found');Identify a frame by its iframe element
If URLs are ambiguous, inspect each frame’s associated iframe element and check its name or id. The current Frame API example uses frame.frameElement(); the reference marks frame.name() deprecated and recommends reading the iframe element instead.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
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- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
for (const candidate of page.frames()) {
const frameElement = await candidate.frameElement();
if (!frameElement) continue;
const nameOrId = await frameElement.evaluate(el => el.name || el.id);
if (nameOrId === 'payment-frame') {
const result = await candidate.evaluate(() => document.body.innerText);
console.log(result);
break;
}
}The main frame may not have an iframe element, which is why the example skips candidates for which frameElement() returns no element. For dynamic pages, wait until the intended frame or content is available before evaluating. See the Frame class reference.
Pass values from Node.js into the frame
The callback passed to evaluate() is serialized. It cannot close over variables or helper functions in your Node.js scope. Pass any needed values as trailing arguments instead:
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
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- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
const selector = '.status';
const status = await frame.evaluate(
selector => document.querySelector(selector)?.textContent?.trim() ?? null,
selector,
);
console.log(status);In the browser callback, selector is the value supplied by Node.js. For multiple values, accept multiple callback parameters and pass those values after the function. Define helper logic inside the callback or pass the necessary data explicitly; a Node.js helper function is not available there just because it is in scope around the call.
Wait for dynamic content before evaluating
If the target element appears asynchronously, wait within the selected frame before querying it. frame.waitForSelector() waits for matching content in that frame and works across navigations. It returns an element handle; it throws if a required element does not appear, and the documented hidden case can return null.
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- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
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- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
const frame = page.frames().find(candidate => candidate.url().includes('/checkout'));
if (!frame) throw new Error('Checkout frame not found');
await frame.waitForSelector('[data-ready="true"]');
const result = await frame.evaluate(() => ({
title: document.title,
ready: document.querySelector('[data-ready="true"]') !== null,
}));
console.log(result);For interactions such as clicking or filling, Puppeteer locators are generally a better fit because they automatically wait for presence and state. Use custom evaluate() when you need browser-side JavaScript that the interaction API does not provide. The Frame.waitForSelector() reference and Page interactions guide describe these approaches.
Choose the right evaluation method
| Method | Use it for | What comes back |
|---|---|---|
frame.evaluate(fn, ...args) |
General-purpose JavaScript in a frame | A serialized result; returned promises are awaited |
frame.evaluateHandle(fn, ...args) |
A live reference to a DOM node or other browser object | A handle that can be used for further browser-side work |
frame.$eval(selector, fn, ...args) |
Run a function against the first matching element | The function’s result |
frame.$$eval(selector, fn, ...args) |
Run a function against matching elements | The function’s result |
frame.waitForSelector(selector, options) |
Wait for a selector to appear in the frame | An element handle, or null in the documented hidden case |
frame.locator(selector) |
Interactions such as clicking or filling | A locator for actions with automatic waiting |
Use ordinary evaluate() for strings, numbers, arrays, and plain objects you want to transfer to Node.js. Browser objects such as DOM nodes do not become usable live Node.js objects through ordinary serialization. Use evaluateHandle() when you need to retain a browser-side reference. For method details, see the JavaScript execution guide and the Frame.$eval() reference.
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- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Dispose of handles when finished
A handle is tied to its frame’s execution context and is disposed when that context is destroyed, such as when the frame navigates away. Dispose of handles you no longer need so they do not retain resources unnecessarily:
const bodyHandle = await frame.evaluateHandle(() => document.body);
try {
const text = await bodyHandle.evaluate(body => body.innerText);
console.log(text);
} finally {
await bodyHandle.dispose();
}Troubleshoot common frame-evaluation problems
- The callback says a Node.js variable is undefined. The callback runs in the browser context and cannot access Node.js lexical variables. Pass the value as an argument, for example
frame.evaluate(value => /* use value */, value). - The result is
{}or does not act like a DOM node. Ordinaryevaluate()serializes its result. Return serializable data for Node.js, or useevaluateHandle()to keep a browser-object reference. - A selector is missing. Confirm that you selected the correct frame, then wait with
frame.waitForSelector(selector)or use a locator for an interaction. The wait can time out if the element never appears. - The script ran in the wrong document. Check the frame URL or inspect the associated iframe element’s
nameorid. A child frame’s DOM is not part of the parent frame’s document. - The element is inside a nested iframe. Find the nested frame in the frame tree and call
evaluate()on that frame itself. - A frame disappears or changes during execution. Frame trees change during attachment, navigation, and detachment. Reacquire the intended frame after the change and wait for its target content before evaluating.
- You no longer need a returned handle. Call its
dispose()method when finished; navigation or context destruction also disposes handles associated with that context.
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Version notes
The linked Puppeteer API references are labeled versions 25.10.0, 25.11.0, and 25.12.0, and the JavaScript execution guide is labeled “Next.” These sources describe the API behavior as documented on October 3, 2026; they do not establish a minimum Puppeteer version for the methods here. Check the API reference matching your installed version if you need version-specific signatures.
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