Recommended Free Tools
Use page.evaluateHandle() to keep a JavaScript object in the page context, then inspect it with handle.evaluate(), getProperty(), or getProperties(). Use jsonValue() when you need serializable data, remoteObject() for Chrome DevTools Protocol metadata, and call dispose() when you are done.
Choose the right way to inspect the value
A Puppeteer JSHandle is a reference to a value in the page’s JavaScript context, not a plain object copied into Node.js. Start with the result you need:
As an Amazon Associate I earn from qualifying purchases.
| Need | Use | What you get |
|---|---|---|
| Keep a page-side object available for more inspection | page.evaluateHandle() |
A JSHandle wrapping the in-page value. |
| Read a field or calculate a small summary | handle.evaluate(fn) |
The function’s returned value, with the referenced object passed as its first argument. |
| Get one property as a separately managed handle | handle.getProperty(name) |
A JSHandle for that property. |
| Enumerate properties as handles | handle.getProperties() |
A map of property names to handles. |
| Get a serializable representation | handle.jsonValue() |
The serializable portions of the value; it does not call toJSON(). |
| Inspect CDP-level metadata | handle.remoteObject() |
The protocol representation, a Runtime.RemoteObject. |
| Release the handle’s reference | handle.dispose() |
Releases the referenced object for garbage collection. |
These are different inspection routes, not interchangeable ways to copy an entire live object. For ordinary debugging, focused evaluate() calls or property handles are usually more useful than protocol metadata.
Inspect a remote object with JSHandle
This example assumes page is an open Puppeteer Page and that window.someAppState exists in the page. It is an illustrative API pattern, not a claim that it was run in a browser.
#1 Best Overall
- CRISP CLARITY: This 23.8″ Philips V line monitor delivers crisp Full HD 1920x1080 visuals. Enjoy movies, shows and videos with remarkable detail
- INCREDIBLE CONTRAST: The VA panel produces brighter whites and deeper blacks. You get true-to-life images and more gradients with 16.7 million colors
- THE PERFECT VIEW: The 178/178 degree extra wide viewing angle prevents the shifting of colors when viewed from an offset angle, so you always get consistent colors
- WORK SEAMLESSLY: This sleek monitor is virtually bezel-free on three sides, so the screen looks even bigger for the viewer. This minimalistic design also allows for seamless multi-monitor setups that enhance your workflow and boost productivity
- A BETTER READING EXPERIENCE: For busy office workers, EasyRead mode provides a more paper-like experience for when viewing lengthy documents
const handle = await page.evaluateHandle(() => window.someAppState);
try {
// Read a focused value while retaining the original page-side object.
const status = await handle.evaluate(value => value.status);
console.log('status:', status);
// Get a property as its own handle, then convert that value if appropriate.
const userHandle = await handle.getProperty('user');
try {
const user = await userHandle.jsonValue();
console.log('user:', user);
} finally {
await userHandle.dispose();
}
// Inspect the underlying Chrome DevTools Protocol representation.
console.log(handle.remoteObject());
} finally {
await handle.dispose();
}For a large or complex object, select only the fields you need inside evaluate() rather than assuming a JSON conversion contains every runtime detail.
Read one property or enumerate properties
Get one property
getProperty(name) returns a handle, so convert it to a value if that is what you need and dispose the property handle when finished.
Rank #2
- CRISP CLARITY: This 22 inch class (21.5″ viewable) Philips V line monitor delivers crisp Full HD 1920x1080 visuals. Enjoy movies, shows and videos with remarkable detail
- 100HZ FAST REFRESH RATE: 100Hz brings your favorite movies and video games to life. Stream, binge, and play effortlessly
- SMOOTH ACTION WITH ADAPTIVE-SYNC: Adaptive-Sync technology ensures fluid action sequences and rapid response time. Every frame will be rendered smoothly with crystal clarity and without stutter
- INCREDIBLE CONTRAST: The VA panel produces brighter whites and deeper blacks. You get true-to-life images and more gradients with 16.7 million colors
- THE PERFECT VIEW: The 178/178 degree extra wide viewing angle prevents the shifting of colors when viewed from an offset angle, so you always get consistent colors
const handle = await page.evaluateHandle(() => window.someAppState);
const statusHandle = await handle.getProperty('status');
try {
console.log(await statusHandle.jsonValue());
} finally {
await statusHandle.dispose();
await handle.dispose();
}Enumerate properties
getProperties() returns a map from property names to handles. Each returned handle has its own lifetime; dispose the handles you use, along with the original handle.
const handle = await page.evaluateHandle(() => window.someAppState);
const properties = await handle.getProperties();
try {
for (const [name, propertyHandle] of properties) {
try {
console.log(name, await propertyHandle.jsonValue());
} catch (error) {
console.log(name, 'could not be converted:', error);
}
}
} finally {
await Promise.all([...properties.values()].map(propertyHandle => propertyHandle.dispose()));
await handle.dispose();
}Enumeration gives you property handles; it does not guarantee that every value can be represented as ordinary JSON. If you only need selected fields, reading them in one handle.evaluate() call can avoid creating and managing many handles.
Rank #3
- Clear visuals. Fluid motion: A 144Hz refresh rate and 1ms MPRT deliver smooth, tear‑free motion across work, gaming, and streaming for clearer, more fluid viewing.
- Eye comfort: TÜV Rheinland 3‑star* certification reduces harmful blue light while preserving stunning color quality without compromise. *TÜV Rheinland 3-star eye comfort certification.
- Wide viewing angle: Get consistent views across a wide 178° /178° viewing angle.
- In-Plane Switching (IPS): See excellent color accuracy and consistency across wide viewing angles with In-plane Switching (IPS) technology.
- Ultra-thin bezels: Maximize your viewing experience with thin bezels.
Use jsonValue() when a by-value result is enough
jsonValue() returns the serializable portions of a handle’s value. It does not invoke a toJSON() method, and it should not be treated as a full inspection of every live object. Some JavaScript values do not fit JSON’s representation; the CDP Runtime model also includes an unserializableValue field for certain primitives that JSON cannot represent.
Use jsonValue() for data you intend to consume in Node.js. Keep the handle and use evaluate() when you need to inspect or derive information from the page-side object itself.
Rank #4
- CURVED FOR ENHANCED ENGAGEMENT: An immersive viewing experience with a curved monitor that wraps more closely around your field of vision; It creates a wider view, enhancing depth perception and minimizing peripheral distraction
- SMOOTH PERFORMANCE FOR SEAMLESS CONTENT: Stay in the action when playing games, watching videos, or working on creative projects; The 100Hz refresh rate reduces lag and motion blur so you don't miss a thing in fast-paced moments¹
- MORE GAMING POWER: Gain the edge with optimizable game settings; Color and image contrast can be adjusted to see scenes more vividly and spot enemies hiding in the dark; Game Mode adjusts any game to fill the screen so you can view every detail²
- KEEP IT EASY ON THE EYES: Care for your eyes and stay comfortable, even during long sessions; Advanced eye comfort technology certified by TÜV reduces eye strain by minimizing blue light and reducing irritating screen flicker²
- INCREASED VERSATILITY: Connect to more; Plug devices straight into your monitor for increased flexibility, making your computing environment even more convenient
What remoteObject() returns
handle.remoteObject() exposes the protocol object behind the handle. CDP’s Runtime.RemoteObject can describe properties such as type, subtype, class name, description, object identifier, serialized value, and certain unserializable primitive values. It is metadata about a remote value, not a recursive copy of an arbitrary object.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsThis is useful when debugging the protocol representation or working with CDP concepts. For property descriptors and lower-level inspection, Puppeteer can create a CDP session attached to a page with Page.createCDPSession(); CDP Runtime’s property inspection operation takes a remote object identifier and returns property descriptors. That lower-level route requires working with protocol commands and identifiers, whereas JSHandle methods are simpler for routine application debugging.
Best Value
- 【INTEGRATED SPEAKERS】Whether you're at work or in the midst of an intense gaming session, our built-in speakers provide rich and seamless audio, all while keeping your desk clutter-free.
- 【EASY ON THE EYES】 Protect your eyes and enhance your comfort with Blue-Light Shift technology. This feature reduces harmful blue light emissions from your screen, helping to alleviate eye strain during long hours of use and promoting healthier viewing habits.
- 【WIDEN YOUR PERSPECTIVE】Our sleek minimal bezel design ensures undivided attention. The nearly bezel-free display seamlessly connects in a dual monitor arrangement, delivering an unobstructed view that lets you focus on more at once, completely distraction-free.
Dispose handles and account for navigation
Puppeteer documents that handles keep their referenced objects from being garbage-collected until the handles are disposed. Dispose the original handle and any property handles created during inspection when you no longer need them. A frame navigating away or its parent execution context being destroyed automatically disposes associated handles, so do not expect a handle to remain usable across that context change.
Troubleshooting common inspection problems
- You see a handle instead of the object’s fields: the handle is a reference, not a copied value. Call
evaluate()for a focused result orjsonValue()for serializable data. jsonValue()omits information: it returns serializable portions and does not calltoJSON(). Read the needed values withevaluate(), or inspect CDP metadata withremoteObject()when protocol details matter.- A property is missing from enumeration:
getProperties()provides property handles; it is not a complete serialization of all runtime behavior. Use a targeted page-side expression for the exact value you need. - A handle stops working after navigation: navigation away from its frame or destruction of the parent context automatically disposes it. Create a new handle in the current page context.
- Memory or object lifetime is unclear: dispose handles created by the inspection, including property handles, when finished. Avoid retaining handles longer than needed.
Or skip the browser setup
If your goal is a screenshot rather than inspecting an in-page JavaScript object, ScreenshotNeo is a website screenshot API and MCP server. One GET request can return a PNG, JPEG, WebP, or PDF. Cookie banners, popups, and chat widgets are removed before capture; bot checks, blank pages, and failed loads are never billed. Its MCP server lets AI agents take screenshots, and the free plan includes 1,000 screenshots per month with no card; paid plans start at $5 for 3,000.
For API options and parameters, see the ScreenshotNeo documentation.
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpSign up for 1,000 free screenshots a month, with no card required.
Version notes
The Puppeteer JSHandle API reference showed version 25.12.0 when accessed, while its remoteObject() page showed 25.11.0. The Page API reference cited is on Puppeteer’s main GitHub branch, and the CDP reference is specifically the versioned v8 Runtime reference. Check documentation matching your installed Puppeteer and browser protocol versions if a signature or protocol detail differs.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
