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puppeteer.Browser.newPage JavaScript and Node.js code

Best JavaScript code snippets using wPage(Showing top 15 results out of 666)(async () => {
const browser = await ()
const page = await wPage()
await (”)
await (‘. playableTile__artwork’)
await reenshot({ path: ”})
await ()})()
async getPage() {
if () {
return;}
const browser = await tBrowser();
= await wPage();
(async () => {
const browser = await ({args: [‘–no-sandbox’]});
const page = await wPage();
await (”);
await init(browser, page, observer, options);})()((observer));
const browser = await ({ headless: true})
await (‘#login_field’, )
await (‘#password’, )
await (‘[name=”commit”]’)
await page. waitForNavigation()
await reenshot({ path: screenshot})
()
(‘See screenshot: ‘ + screenshot)})()
await tViewport({ width: 1280, height: 800})
await (”, { waitUntil: ‘networkidle2’})
await page. waitForSelector(”)
await ()
(‘See screen shot: ‘ + screenshot)})()
(‘dialog’, async dialog => {
(ssage())
await dialog. dismiss()})
await page. evaluate(() => alert(‘This message is inside an alert box’))
const name = await page. $eval(‘ > a’, el => nerText)
(name)
await page. emulate(iPhone)
await reenshot({
path: ”,
fullPage: true})
(await ())
await (‘trix-editor’)
await (‘Just adding a title’)
await tCookie(cookie)
const title = await ()
(title)
await tViewport({ width: 800, height: 600})
await (132, 103, { button: ‘left’})
await tViewport(viewPort)
await reenshot(options)
await reenshot({ path: ”, fullPage: true})
(‘See screen shot: ‘ + screenshot)})()
puppeteer/api.md at main - GitHub

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puppeteer/api.md at main – GitHub

Interactive Documentation: API Translations: 中文|Chinese
Troubleshooting:
Releases per Chromium version:
Chromium 93. 0. 4577. 0 – Puppeteer v10. 2. 0
Chromium 92. 4512. 0
Chromium 91. 4469. 0 – Puppeteer v9. 0
Chromium 90. 4427. 0 – Puppeteer v8. 4403. 0 – Puppeteer v7. 0
Chromium 89. 4389. 0 – Puppeteer v6. 0
Chromium 88. 4298. 0 – Puppeteer v5. 5. 0
Chromium 87. 4272. 4. 0
Chromium 86. 4240. 3. 0
Chromium 85. 4182. 1
Chromium 84. 4147. 1. 0
Chromium 83. 4103. 0 – Puppeteer v3. 0
Chromium 81. 4044. 0
Chromium 80. 3987. 0 – Puppeteer v2. 0
Chromium 79. 3942. 0
Chromium 78. 3882. 0 – Puppeteer v1. 20. 0
Chromium 77. 3803. 19. 0
Chromium 76. 17. 0
Chromium 75. 3765. 15. 0
Chromium 74. 3723. 13. 0
Chromium 73. 3679. 12. 2
All releases
Table of Contents
Overview
puppeteer vs puppeteer-core
Environment Variables
Working with Chrome Extensions
class: Puppeteer
earCustomQueryHandlers()
nnect(options)
eateBrowserFetcher([options])
stomQueryHandlerNames()
faultArgs([options])
vices
puppeteer. executablePath()
([options])
tworkConditions
oduct
gisterCustomQueryHandler(name, queryHandler)
puppeteer. unregisterCustomQueryHandler(name)
class: BrowserFetcher
nDownload(revision)
wnload(revision[, progressCallback])
()
browserFetcher. localRevisions()
atform()
oduct()
(revision)
visionInfo(revision)
class: Browser
event: ‘disconnected’
event: ‘targetchanged’
event: ‘targetcreated’
event: ‘targetdestroyed’
owserContexts()
eateIncognitoBrowserContext([options])
faultBrowserContext()
browser. disconnect()
Connected()
wPage()
ocess()
s()
erAgent()
rsion()
browser. waitForTarget(predicate[, options])
Endpoint()
class: BrowserContext
owser()
earPermissionOverrides()
Incognito()
browserContext. overridePermissions(origin, permissions)
browserContext. waitForTarget(predicate[, options])
class: Page
event: ‘close’
event: ‘console’
event: ‘dialog’
event: ‘domcontentloaded’
event: ‘error’
event: ‘frameattached’
event: ‘framedetached’
event: ‘framenavigated’
event: ‘load’
event: ‘metrics’
event: ‘pageerror’
event: ‘popup’
event: ‘request’
event: ‘requestfailed’
event: ‘requestfinished’
event: ‘response’
event: ‘workercreated’
event: ‘workerdestroyed’
page. $(selector)
page. $$(selector)
page. $$eval(selector, pageFunction[,.. ])
page. $eval(selector, pageFunction[,.. $x(expression)
cessibility
dScriptTag(options)
dStyleTag(options)
thenticate(credentials)
ingToFront()
owserContext()
(selector[, options])
ntent()
okies([.. ])
verage
eatePDFStream([options])
leteCookie(okies)
page. emulate(options)
page. emulateCPUThrottling(factor)
page. emulateIdleState(overrides)
page. emulateMediaFeatures(features)
page. emulateMediaType(type)
page. emulateNetworkConditions(networkConditions)
page. emulateTimezone(timezoneId)
page. emulateVisionDeficiency(type)
page. evaluate(pageFunction[,.. evaluateHandle(pageFunction[,.. evaluateOnNewDocument(pageFunction[,.. exposeFunction(name, puppeteerFunction)
(selector)
page. goForward([options])
(url[, options])
Closed()
DragInterceptionEnabled()
JavaScriptEnabled()
yboard
inFrame()
trics()
page. queryObjects(prototypeHandle)
reenshot([options])
(selector,.. )
tBypassCSP(enabled)
tCacheEnabled([enabled])
tContent(html[, options])
tCookie(okies)
tDefaultNavigationTimeout(timeout)
tDefaultTimeout(timeout)
tDragInterception(enabled)
tExtraHTTPHeaders(headers)
tGeolocation(options)
tJavaScriptEnabled(enabled)
tOfflineMode(enabled)
tRequestInterception(value)
Cooperative Intercept Mode and Legacy Intercept Mode
Upgrading to Cooperative Mode for package maintainers
tUserAgent(userAgent[, userAgentMetadata])
tViewport(viewport)
uchscreen
acing
(selector, text[, options])
ewport()
page. waitFor(selectorOrFunctionOrTimeout[, options[,.. ]])
page. waitForFileChooser([options])
page. waitForFunction(pageFunction[, options[,.. waitForNavigation([options])
page. waitForNetworkIdle([options])
page. waitForRequest(urlOrPredicate[, options])
page. waitForResponse(urlOrPredicate[, options])
page. waitForSelector(selector[, options])
page. waitForTimeout(milliseconds)
page. waitForXPath(xpath[, options])
ers()
GeolocationOptions
WaitTimeoutOptions
class: WebWorker
webWorker. ])
webWorker. executionContext()
class: Accessibility
apshot([options])
class: Keyboard
(key[, options])
ndCharacter(char)
(text[, options])
(key)
class: Mouse
(x, y[, options])
(start, target)
mouse. dragAndDrop(start, target[, options])
mouse. dragEnter(target, data)
mouse. dragOver(target, data)
(target, data)
class: Touchscreen
(x, y)
class: Tracing
class: FileChooser
(filePaths)
Multiple()
class: Dialog
([promptText])
faultValue()
dialog. dismiss()
ssage()
class: ConsoleMessage
consoleMessage. location()
ackTrace()
class: Frame
frame. $(selector)
frame. $$(selector)
frame. ])
frame. $x(expression)
ildFrames()
frame. executionContext()
Detached()
rentFrame()
frame. ]])
frame. waitForNavigation([options])
frame. waitForSelector(selector[, options])
frame. waitForTimeout(milliseconds)
frame. waitForXPath(xpath[, options])
class: ExecutionContext
executionContext. ])
executionContext. queryObjects(prototypeHandle)
class: JSHandle
Element()
jsHandle. dispose()
jsHandle. ])
jsHandle. executionContext()
tProperties()
tProperty(propertyName)
jsHandle. jsonValue()
class: ElementHandle
elementHandle. $(selector)
elementHandle. $$(selector)
elementHandle. ])
elementHandle. $x(expression)
undingBox()
xModel()
ickablePoint([offset])
ntentFrame()
elementHandle. dispose()
(target)
elementHandle. dragAndDrop(target[, options])
elementHandle. dragEnter([data])
elementHandle. dragOver([data])
([data])
elementHandle. executionContext()
IntersectingViewport([options])
elementHandle. jsonValue()
(.. )
String()
elementHandle. uploadFile(lePaths)
class: HTTPRequest
([errorCode], [priority])
Request. abortErrorReason()
ntinue([overrides], [priority])
ntinueRequestOverrides()
Request. enqueueInterceptAction(pendingHandler)
ure()
nalizeInterceptions()
Request. headers()
itiator()
NavigationRequest()
Data()
directChain()
sourceType()
spond(response, [priority])
sponse()
sponseForRequest()
class: HTTPResponse
omCache()
omServiceWorker()
Response. headers()
moteAddress()
quest()
curityDetails()
atusText()
class: SecurityDetails
otocol()
bjectAlternativeNames()
bjectName()
lidFrom()
lidTo()
class: Target
eateCDPSession()
class: CDPSession
nnection()
(method[, ramArgs])
class: Coverage
artCSSCoverage([options])
artJSCoverage([options])
opCSSCoverage()
opJSCoverage()
class: TimeoutError
class: EventEmitter
dListener(event, handler)
(event, [eventData])
stenerCount(event)
(event, handler)
moveAllListeners([event])
moveListener(event, handler)
interface: CustomQueryHandler
Puppeteer is a Node library which provides a high-level API to control Chromium or Chrome over the DevTools Protocol.
The Puppeteer API is hierarchical and mirrors the browser structure.
NOTE On the following diagram, faded entities are not currently represented in Puppeteer.
Puppeteer communicates with the browser using DevTools Protocol.
Browser instance can own multiple browser contexts.
BrowserContext instance defines a browsing session and can own multiple pages.
Page has at least one frame: main frame. There might be other frames created by iframe or frame tags.
Frame has at least one execution context – the default execution context – where the frame’s JavaScript is executed. A Frame might have additional execution contexts that are associated with extensions.
Worker has a single execution context and facilitates interacting with WebWorkers.
(Diagram source: link)
Every release since v1. 7. 0 we publish two packages:
puppeteer
puppeteer-core
puppeteer is a product for browser automation. When installed, it downloads a version of
Chromium, which it then drives using puppeteer-core. Being an end-user product, puppeteer supports a bunch of convenient PUPPETEER_* env variables to tweak its behavior.
puppeteer-core is a library to help drive anything that supports DevTools protocol. puppeteer-core doesn’t download Chromium when installed. Being a library, puppeteer-core is fully driven
through its programmatic interface and disregards all the PUPPETEER_* env variables.
To sum up, the only differences between puppeteer-core and puppeteer are:
puppeteer-core doesn’t automatically download Chromium when installed.
puppeteer-core ignores all PUPPETEER_* env variables.
In most cases, you’ll be fine using the puppeteer package.
However, you should use puppeteer-core if:
you’re building another end-user product or library atop of DevTools protocol. For example, one might build a PDF generator using puppeteer-core and write a custom script that downloads headless_shell instead of Chromium to save disk space.
you’re bundling Puppeteer to use in Chrome Extension / browser with the DevTools protocol where downloading an additional Chromium binary is unnecessary.
you’re building a set of tools where puppeteer-core is one of the ingredients and you want to postpone script execution until Chromium is about to be used.
When using puppeteer-core, remember to change the include line:
const puppeteer = require(‘puppeteer-core’);
You will then need to call nnect([options]) or ([options]) with an explicit executablePath or channel option.
Puppeteer looks for certain environment variables to aid its operations.
If Puppeteer doesn’t find them in the environment during the installation step, a lowercased variant of these variables will be used from the npm config.
HTTP_PROXY, HTTPS_PROXY, NO_PROXY – defines HTTP proxy settings that are used to download and run the browser.
PUPPETEER_SKIP_CHROMIUM_DOWNLOAD – do not download bundled Chromium during installation step.
PUPPETEER_TMP_DIR – defines the directory to be used by Puppeteer for creating temporary files. Defaults to ().
PUPPETEER_DOWNLOAD_HOST – overwrite URL prefix that is used to download Chromium. Note: this includes protocol and might even include path prefix. Defaults to PUPPETEER_DOWNLOAD_PATH – overwrite the path for the downloads folder. Defaults to /, where is Puppeteer’s package root.
PUPPETEER_CHROMIUM_REVISION – specify a certain version of Chromium you’d like Puppeteer to use. See ([options]) on how executable path is inferred. BEWARE: Puppeteer is only guaranteed to work with the bundled Chromium, use at your own risk.
PUPPETEER_EXECUTABLE_PATH – specify an executable path to be used in See ([options]) on how the executable path is inferred. BEWARE: Puppeteer is only guaranteed to work with the bundled Chromium, use at your own risk.
PUPPETEER_PRODUCT – specify which browser you’d like Puppeteer to use. Must be one of chrome or firefox. This can also be used during installation to fetch the recommended browser binary. Setting product programmatically in ([options]) supersedes this environment variable. The product is exposed in oduct
NOTE PUPPETEER_* env variables are not accounted for in the puppeteer-core package.
Puppeteer can be used for testing Chrome Extensions.
NOTE Extensions in Chrome / Chromium currently only work in non-headless mode.
The following is code for getting a handle to the background page of an extension whose source is located in. /my-extension:
const puppeteer = require(‘puppeteer’);
(async () => {
const pathToExtension = require(‘path’)(__dirname, ‘my-extension’);
const browser = await ({
headless: false,
args: [
`–disable-extensions-except=${pathToExtension}`,
`–load-extension=${pathToExtension}`, ], });
const targets = await s();
const backgroundPageTarget = (
(target) => () === ‘background_page’);
const backgroundPage = await ();
// Test the background page as you would any other page.
await ();})();
NOTE It is not yet possible to test extension popups or content scripts.
Puppeteer module provides a method to launch a Chromium instance.
The following is a typical example of using Puppeteer to drive automation:
const browser = await ();
const page = await wPage();
await (”);
// other actions…
Clears all registered handlers.
options
browserWSEndpoint a browser websocket endpoint to connect to.
browserURL a browser URL to connect to, in format ${host}:${port}. Use interchangeably with browserWSEndpoint to let Puppeteer fetch it from metadata endpoint.
ignoreHTTPSErrors Whether to ignore HTTPS errors during navigation. Defaults to false.
defaultViewport Sets a consistent viewport for each page. Defaults to an 800×600 viewport. null disables the default viewport.
width page width in pixels.
height page height in pixels.
deviceScaleFactor Specify device scale factor (can be thought of as DPR). Defaults to 1.
isMobile Whether the meta viewport tag is taken into account. Defaults to false.
hasTouch Specifies if viewport supports touch events. Defaults to false
isLandscape Specifies if viewport is in landscape mode. Defaults to false.
slowMo Slows down Puppeteer operations by the specified amount of milliseconds. Useful so that you can see what is going on.
transport Experimental Specify a custom transport object for Puppeteer to use.
product Possible values are: chrome, firefox. Defaults to chrome.
targetFilter Use this function to decide if Puppeteer should connect to the given target. If a targetFilter is provided, Puppeteer only connects to targets for which targetFilter returns true. By default, Puppeteer connects to all available targets.
returns: >
This methods attaches Puppeteer to an existing browser instance.
host A download host to be used. Defaults to. If the product is firefox, this defaults to path A path for the downloads folder. Defaults to /, where is Puppeteer’s package root. If the product is firefox, this defaults to /
platform <"linux"|"mac"|"win32"|"win64"> string for the current platform. Possible values are: mac, win32, win64, linux. Defaults to the current platform.
product <"chrome"|"firefox"> string for the product to run. Possible values are: chrome, firefox. Defaults to chrome.
returns:
returns: A list with the names of all registered custom query handlers.
options Set of configurable options to set on the browser. Can have the following fields:
headless Whether to run browser in headless mode. Defaults to true unless the devtools option is true.
args > Additional arguments to pass to the browser instance. The list of Chromium flags can be found here.
userDataDir Path to a User Data Directory.
devtools Whether to auto-open a DevTools panel for each tab. If this option is true, the headless option will be set false.
debuggingPort Specify custom debugging port. Pass 0 to discover a random port. Defaults to 0.
returns: >
The default flags that Chromium will be launched with.
returns:
Returns a list of devices to be used with page. emulate(options). Actual list of
devices can be found in src/common/
const iPhone = vices[‘iPhone 6’];
await page. emulate(iPhone);
TimeoutError A class of TimeoutError.
Puppeteer methods might throw errors if they are unable to fulfill a request. For example, page. waitForSelector(selector[, options])
might fail if the selector doesn’t match any nodes during the given timeframe.
For certain types of errors Puppeteer uses specific error classes.
These classes are available via
An example of handling a timeout error:
try {
await page. waitForSelector(”);} catch (e) {
if (e instanceof) {
// Do something if this is a timeout. }}
NOTE The old way (Puppeteer versions <= v1. 14. 0) errors can be obtained with require('puppeteer/Errors'). returns: A path where Puppeteer expects to find the bundled browser. The browser binary might not be there if the download was skipped with PUPPETEER_SKIP_CHROMIUM_DOWNLOAD.
NOTE puppeteer. executablePath() is affected by the PUPPETEER_EXECUTABLE_PATH and PUPPETEER_CHROMIUM_REVISION env variables. See Environment Variables for details.
product Which browser to launch. At this time, this is either chrome or firefox. See also PUPPETEER_PRODUCT.
channel When specified, Puppeteer will search for the locally installed release channel of Google Chrome and use it to launch. Available values are chrome, chrome-beta, chrome-canary, chrome-dev. When channel is specified, executablePath cannot be specified.
executablePath Path to a browser executable to run instead of the bundled Chromium. If executablePath is a relative path, then it is resolved relative to current working directory. BEWARE: Puppeteer is only guaranteed to work with the bundled Chromium, use at your own risk.
args > Additional arguments to pass to the browser instance. The list of Chromium flags can be found here, and here is the list of Firefox flags.
ignoreDefaultArgs > If true, then do not use faultArgs(). If an array is given, then filter out the given default arguments. Dangerous option; use with care. Defaults to false.
handleSIGINT Close the browser process on Ctrl-C. Defaults to true.
handleSIGTERM Close the browser process on SIGTERM. Defaults to true.
handleSIGHUP Close the browser process on SIGHUP. Defaults to true.
timeout Maximum time in milliseconds to wait for the browser instance to start. Defaults to 30000 (30 seconds). Pass 0 to disable timeout.
dumpio Whether to pipe the browser process stdout and stderr into and Defaults to false.
env Specify environment variables that will be visible to the browser. Defaults to
pipe Connects to the browser over a pipe instead of a WebSocket. Defaults to false.
extraPrefsFirefox Additional preferences that can be passed to Firefox (see PUPPETEER_PRODUCT)
waitForInitialPage Whether to wait for the initial page to be ready. Defaults to true.
returns: > Promise which resolves to browser instance.
You can use ignoreDefaultArgs to filter out –mute-audio from default arguments:
ignoreDefaultArgs: [‘–mute-audio’], });
NOTE Puppeteer can also be used to control the Chrome browser, but it works best with the version of Chromium it is bundled with. There is no guarantee it will work with any other version. Use executablePath or channel option with extreme caution.
If Google Chrome (rather than Chromium) is preferred, a Chrome Canary or Dev Channel build is suggested.
In ([options]) above, any mention of Chromium also applies to Chrome.
See this article for a description of the differences between Chromium and Chrome. This article describes some differences for Linux users.
Returns a list of network conditions to be used with page. emulateNetworkConditions(networkConditions). Actual list of
conditions can be found in src/common/
const slow3G = tworkConditions[‘Slow 3G’];
await page. emulateNetworkConditions(slow3G);
returns: returns the name of the browser that is under automation (“chrome” or “firefox”)
The product is set by the PUPPETEER_PRODUCT environment variable or the product option in ([options]) and defaults to chrome. Firefox support is experimental and requires to install Puppeteer via PUPPETEER_PRODUCT=firefox npm i puppeteer.
name The name that the custom query handler will be registered under.
queryHandler The custom query handler to register.
Registers a custom query handler. After registration, the handler can be used everywhere where a selector is expected by prepending the selection string with /. The name is only allowed to consist of lower and upper case Latin letters.
Example:
gisterCustomQueryHandler(‘getByClass’, {
queryOne: (element, selector) => {
return element. querySelector(`. ${selector}`);},
queryAll: (element, selector) => {
return element. querySelectorAll(`. ${selector}`);}, });
const aHandle = await page. $(‘getByClass/…’);
name The name of the query handler to unregister.
BrowserFetcher can download and manage different versions of Chromium and Firefox.
BrowserFetcher operates on revision strings that specify a precise version of Chromium, e. g. “533271”. Revision strings can be obtained from
In the Firefox case, BrowserFetcher downloads Firefox Nightly and operates on version numbers such as “75”.
An example of using BrowserFetcher to download a specific version of Chromium and running
Puppeteer against it:
const browserFetcher = eateBrowserFetcher();
const revisionInfo = await wnload(‘533271’);
executablePath: revisionInfo. executablePath, });
NOTE BrowserFetcher is not designed to work concurrently with other
instances of BrowserFetcher that share the same downloads directory.
revision a revision to check availability.
returns: > returns true if the revision could be downloaded from the host.
The method initiates a HEAD request to check if the revision is available.
revision a revision to download.
progressCallback A function that will be called with two arguments:
downloadedBytes how many bytes have been downloaded
totalBytes how large is the total download
returns: > Resolves with revision information when the revision is downloaded and extracted
revision the revision the info was created from
folderPath path to the extracted revision folder
executablePath path to the revision executable
url URL this revision can be downloaded from
local whether the revision is locally available on disk
The method initiates a GET request to download the revision from the host.
returns: The download host being used.
returns: >> A list of all revisions (for the current product) available locally on disk.
returns: One of mac, linux, win32 or win64.
returns: One of chrome or firefox.
revision a revision to remove for the current product. The method will throw if the revision has not been downloaded.
returns: Resolves when the revision has been removed.
revision a revision to get info for.
product one of chrome or firefox
NOTE Many BrowserFetcher methods, like remove and revisionInfo
are affected by the choice of product. See eateBrowserFetcher([options]).
extends: EventEmitter
A Browser is created when Puppeteer connects to a Chromium instance, either through or nnect.
An example of using a Browser to create a Page:
An example of disconnecting from and reconnecting to a Browser:
// Store the endpoint to be able to reconnect to Chromium
const browserWSEndpoint = Endpoint();
// Disconnect puppeteer from Chromium
browser. disconnect();
// Use the endpoint to reestablish a connection
const browser2 = await nnect({ browserWSEndpoint});
// Close Chromium
Emitted when Puppeteer gets disconnected from the Chromium instance. This might happen because of one of the following:
Chromium is closed or crashed
The browser. disconnect method was called

Emitted when the URL of a target changes.
NOTE This includes target changes in incognito browser contexts.
Emitted when a target is created, for example when a new page is opened by or wPage.
NOTE This includes target creations in incognito browser contexts.
Emitted when a target is destroyed, for example when a page is closed.
NOTE This includes target destructions in incognito browser contexts.
returns: >
Returns an array of all open browser contexts. In a newly created browser, this will return
a single instance of BrowserContext.
returns:
Closes Chromium and all of its pages (if any were opened). The Browser object itself is considered to be disposed and cannot be used anymore.
During the process of closing the browser, Puppeteer attempts to delete the temp folder created exclusively for this browser instance. If this fails (either because a file in the temp folder is locked by another process or because of insufficient permissions) an error is logged. This implies that: a) the folder and/or its content is not fully deleted; and b) the connection with the browser is not properly disposed (see browser. disconnect()).
options Set of configurable options to set on the browserContext. Can have the following fields:
proxyServer Optional proxy server with optional port to use for all requests. Username and password can be set in thenticate(credentials).
proxyBypassList Optional: Bypass the proxy for the given semi-colon-separated list of hosts.
returns: >
Creates a new incognito browser context. This won’t share cookies/cache with other browser contexts.
// Create a new incognito browser context.
const context = await eateIncognitoBrowserContext();
// Create a new page in a pristine context.
// Do stuff
await (”);})();
returns:
Returns the default browser context. The default browser context can not be closed.
Disconnects Puppeteer from the browser but leaves the Chromium process running. After calling disconnect, the Browser object is considered disposed and cannot be used anymore.
returns:
Indicates that the browser is connected.
returns: >
Promise which resolves to a new Page object. The Page is created in a default browser context.
returns: >> Promise which resolves to an array of all open pages. Non visible pages, such as “background_page”, will not be listed here. You can find them using ().
An array of all pages inside the Browser. In case of multiple browser contexts,
the method will return an array with all the pages in all browser contexts.
returns: Spawned browser process. Returns null if the browser instance was created with nnect method.
returns:
A target associated with the browser.
returns: >
An array of all active targets inside the Browser. In case of multiple browser contexts,
the method will return an array with all the targets in all browser contexts.
returns: > Promise which resolves to the browser’s original user agent.
NOTE Pages can override browser user agent with tUserAgent
returns: > For headless Chromium, this is similar to HeadlessChrome/61. 3153. For non-headless, this is similar to Chrome/61. 0.
NOTE the format of rsion() might change with future releases of Chromium.
predicate A function to be run for every target
timeout Maximum wait time in milliseconds. Pass 0 to disable the timeout. Defaults to 30 seconds.
returns: > Promise which resolves to the first target found that matches the predicate function.
This searches for a target in all browser contexts.
An example of finding a target for a page opened via
await page. evaluate(() => (”));
const newWindowTarget = await browser. waitForTarget(
(target) => () === ”);
returns: Browser websocket URL.
Browser websocket endpoint which can be used as an argument to
nnect. The format is ws${host}:${port}/devtools/browser/
You can find the webSocketDebuggerUrl from ${host}:${port}/json/version. Learn more about the devtools protocol and the browser endpoint.
BrowserContexts provide a way to operate multiple independent browser sessions. When a browser is launched, it has
a single BrowserContext used by default. The method wPage() creates a page in the default browser context.
If a page opens another page, e. with a call, the popup will belong to the parent page’s browser
context.
Puppeteer allows creation of “incognito” browser contexts with eateIncognitoBrowserContext() method.
“Incognito” browser contexts don’t write any browsing data to disk.
// Create a new incognito browser context
// Create a new page inside context.
//… do stuff with page…
// Dispose context once it’s no longer needed.
await ();
Emitted when the URL of a target inside the browser context changes.
Emitted when a new target is created inside the browser context, for example when a new page is opened by or wPage.
Emitted when a target inside the browser context is destroyed, for example when a page is closed.
returns:
The browser this browser context belongs to.
Clears all permission overrides for the browser context.
const context = faultBrowserContext();
context. overridePermissions(”, [‘clipboard-read’]);
// do stuff..
earPermissionOverrides();
Closes the browser context. All the targets that belong to the browser context
will be closed.
NOTE only incognito browser contexts can be closed.
Returns whether BrowserContext is incognito.
The default browser context is the only non-incognito browser context.
NOTE the default browser context cannot be closed.
Creates a new page in the browser context.
origin The origin to grant permissions to, e. “.
permissions > An array of permissions to grant. All permissions that are not listed here will be automatically denied. Permissions can be one of the following values:
‘geolocation’
‘midi’
‘midi-sysex’ (system-exclusive midi)
‘notifications’
‘push’
‘camera’
‘microphone’
‘background-sync’
‘ambient-light-sensor’
‘accelerometer’
‘gyroscope’
‘magnetometer’
‘accessibility-events’
‘clipboard-read’
‘clipboard-write’
‘payment-handler’
‘persistent-storage’
await context. overridePermissions(”, [‘geolocation’]);
An array of all pages inside the browser context.
An array of all active targets inside the browser context.
This searches for a target in this specific browser context.
const newWindowTarget = await browserContext. waitForTarget(
Page provides methods to interact with a single tab or extension background page in Chromium. One Browser instance might have multiple Page instances.
This example creates a page, navigates it to a URL, and then saves a screenshot:
await reenshot({ path: ”});
The Page class emits various events (described below) which can be handled using
any of the EventEmitter methods, such as on, once
or off.
This example logs a message for a single page load event:
(‘load’, () => (‘Page loaded! ‘));
To unsubscribe from events use the off method:
function logRequest(interceptedRequest) {
(‘A request was made:’, ());}
(‘request’, logRequest);
// Sometime later…
Emitted when the page closes.

Emitted when JavaScript within the page calls one of console API methods, e. or Also emitted if the page throws an error or a warning.
The arguments passed into appear as arguments on the event handler.
An example of handling console event:
(‘console’, (msg) => {
for (let i = 0; i < (); ++i) (`${i}: ${()[i]}`);}); page. evaluate(() => (‘hello’, 5, { foo: ‘bar’}));

Emitted when a JavaScript dialog appears, such as alert, prompt, confirm or beforeunload. Puppeteer can respond to the dialog via Dialog’s accept or dismiss methods.
Emitted when the JavaScript DOMContentLoaded event is dispatched.

Emitted when the page crashes.
NOTE error event has a special meaning in Node, see error events for details.

Emitted when a frame is attached.
Emitted when a frame is detached.
Emitted when a frame is navigated to a new URL.
Emitted when the JavaScript load event is dispatched.

title The title passed to console. timeStamp.
metrics Object containing metrics as key/value pairs. The values
of metrics are of type.
Emitted when the JavaScript code makes a call to console. timeStamp. For the list
of metrics see trics.
The exception message
Emitted when an uncaught exception happens within the page.
Page corresponding to “popup” window
Emitted when the page opens a new tab or window.
const [popup] = await ([
new Promise((resolve) => (‘popup’, resolve)),
(‘a[target=_blank]’), ]);
page. evaluate(() => (”)), ]);

Emitted when a page issues a request. The HTTPRequest object is read-only.
In order to intercept and mutate requests, see tRequestInterception.
Emitted when a request fails, for example by timing out.
NOTE HTTP Error responses, such as 404 or 503, are still successful responses from HTTP standpoint,
Puppeteer vs Selenium: Core Differences | BrowserStack

Puppeteer vs Selenium: Core Differences | BrowserStack

Even though both Puppeteer and Selenium serve the same purpose of facilitating automation testing, a comparison of them is helpful for developers and testers seeking to choose the right tool for their requirements, whether project-based or long-term. This article will explore their strengths as automation test frameworks and allow readers to make an informed choice between them. Introduction to PuppeteerPuppeteer is a Node library that provides a high-level API to control headless Chrome over the DevTools Protocol. Also known as a Headless Chrome Node API, it is useful for automating the Chrome browser to run website damentally, Puppeteer is an automation tool and not a test tool. This simply means it is incredibly popular for use cases such as scraping, generating PDFs, etc. Puppeteer uses Chrome DevTools protocol and the debugger protocol for Selenium is JSONWire. Both are used to perform clicks. In the case of practice Puppeteer and Selenium, use the same code for performing ominent Features of PuppeteerThe most prominent features supported by Puppeteer are as follows:Screenshot TestingPerformance TestingWeb ScrapingEasy AutomationLimitations of PuppeteerThe complexity and automation context are changing with each passing day and hence, one tool might not be the solution for all. Puppeteer has some limitations like, it supports only Chrome browser. Puppeteer for Firefox is a work in troduction to SeleniumSelenium automates browsers. Primarily, it is for automating web applications for testing purposes but is certainly not limited to just that. It supports numerous features that are helpful for automation testing. Selenium supports multiple programming languages and platforms. It also supports testing on multiple major browsers in global, let’s understand the pros and cons of SeleniumPros of Selenium:Open source and freely availableIntegrated with CI, and AgileSupports cross-browser, a wide range of OS and programming languagesHas huge community support along with a large library and extensionsCons of Selenium:Steep learning curveDoesn’t support built-in image comparisonExplore the various features of Selenium with this Selenium WebDriver tutorial. Try Selenium Testing for FreeMarket Trends on Selenium and PuppeteerThe image below depicts that Selenium’s popularity is long-established and keeps growing. That doesn’t imply that Puppeteer is not popular. It is especially popular when it comes to automating the Chrome are unique in their own ways Selenium does take an edge over Puppeteer in terms of overall popularity and urceSetup and Test Implementation of Puppeteer and SeleniumSelenium and Puppeteer are the two automation testing tools that can be directly installed using install Selenium, type the following command in the terminal:npm install selenium-webdriverAnother way is to study and use the Selenium Installation here. Here, creating a driver and using it is easy—the syntax is verbose compared to the alternatives but still pretty straightforward:The example below located the Yahoo sign up page using the Xpath (“);
ndElement((“//input[@id=’usernamereg-firstName’]”)). sendKeys(“Your-Name”); // Will send values to First Name tab
ndElement((“//input[@id=’usernamereg-lastName’]”)). sendKeys(“Your-Last_name”); //xpath for last name box
ndElement((“//input[@id=’usernamereg-yid’]”)). sendKeys(“”); //xpath for email box
Now, on to Puppeteer. To install Puppeteer, type the command below in the terminal:npm install puppeteerNow, let’s locate the same sign-up page using the Puppeteer syntax:await (‘);
await (‘button’);
await (‘#sign-up’, ‘your_name’);
await (‘[type=email]’, ‘your_email’);People also read: How to Build and Execute Selenium ProjectsPuppeteer vs Selenium: Core DifferencesPuppeteerSeleniumPuppeteer was developed by Google and runs the script on ChromiumSelenium is the library that is used to automate Chrome. This library is open-source and provides a high-level API to control ChromeIs a libraryIs a web framework for testing web applicationsWorks only with Chrome or Chromium and does not support other browsers. Supports multiple browsers like Chrome, IE, Firefox, Safari, etc. Cross-platform support is provided across all the available browsersWas released in 2017Was released in 2004Supports only Node. jsSupports multiple languages like Python, Ruby, Javascript, Java, pports only web automationSupports web automation and mobile automationScreenshot can be taken of both PDFs and imagesScreenshot can be taken of both PDFs and images only in Selenium 4Selenium or Puppeteer: Which is the preferred one? Considering all the above factors, Puppeteer is the go-to tool if devs and testers are specifically working with Google Browser alone. But considering the fact that cross-browser testing must be conducted across platforms and using multiple programming languages, Selenium is the best fit for automation testing. It comes with library support for multiple programming languages, drivers for different browsers, and is not always about cross-browser support or platform support, sometimes other functionalities like record and playback for testing web applications matter a lot. That’s something Selenium supports. The code can be re-used, and also it is loaded with packages and test suites. It is considered to be a tool that is the best fit for Automation testing. As ease of access and configuration is pretty simple, one doesn’t have to download Selenium like a piece of software. But they might need some of its components to run tests on automated browser instances on their own get a hang of this, simply head over to Automate Documentation. Pick a language and/or framework you typically work with. Follow the steps to install the components required, and run a couple of sample tests. It is easy to acquire a functional understanding of Selenium automation testing in no to test websites on real browsers and devices? Take a look at BrowserStack Automate, which offers instant access to a cloud Selenium Grid and 2000+ browsers and real desktop and mobile running the code detailed above using Selenium. Bear in mind that Selenium tests must be run on a real device cloud to get completely accurate results. BrowserStack’s cloud Selenium grid of 2000+ real browsers and devices allows testers to automated visual UI tests in real user conditions. Simply sign up, select a device-browser-OS combination, and start running tests for free.

Frequently Asked Questions about browser newpage

What is puppeteer browser?

Puppeteer is a Node library that provides a high-level API to control headless Chrome over the DevTools Protocol. Also known as a Headless Chrome Node API, it is useful for automating the Chrome browser to run website tests. Fundamentally, Puppeteer is an automation tool and not a test tool.Mar 26, 2021

How do I run a puppeteer in Chrome?

To use Puppeteer with a different version of Chrome or Chromium, pass in the executable’s path when creating a Browser instance: const browser = await puppeteer. launch({ executablePath: ‘/path/to/Chrome’ }); You can also use Puppeteer with Firefox Nightly (experimental support).Sep 22, 2021

What is Google puppeteer?

Puppeteer is a Node library which provides a high-level API to control headless Chrome or Chromium over the DevTools Protocol. It can also be configured to use full (non-headless) Chrome or Chromium.Feb 11, 2021

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