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[🐛 Bug]: "Leave site" dialog is not properly handled when using BiDi protocol #14823

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#14957
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[🐛 Bug]: "Leave site" dialog is not properly handled when using BiDi protocol#14823
#14957
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Bug 🐛Needs Triaging ⏳No one has looked into the issue yet
@alexanderjkremer

Description

@alexanderjkremer
alexanderjkremer
opened on Oct 21, 2025

Have you read the Contributing Guidelines on issues?

WebdriverIO Version

9.20.0

Node.js Version

22.14.0

Mode

WDIO Testrunner

Which capabilities are you using?

{
  browserName: 'chrome'
}

What happened?

When attempting to navigate away from a page with a beforeunload event listener using browser.url while using the BiDi protocol the following error is thrown. Even though the navigation to the new URL was successful - this still fails the test.

Unhandled promise rejection: Error: WebDriver Bidi command "browsingContext.handleUserPrompt" failed with error: no such alert - No dialog is showing

Attempting to use the browser.on('dialog') handler as described in the documentation does not effect this outcome as far as I can tell https://webdriver.io/docs/api/dialog/. When running tests in our product - removing the beforeunload event listener completely prevents this error from occurring and the test proceeds as expected.

This dialog does disappear before the failure occurs - but I manually reproduced the steps to invoke it for the sake of screenshotting the exact dialog box it's failing to handle

Image

What is your expected behavior?

I expect to be able to either accept or dismiss this dialog using the browser.on('dialog') handler as described in the documentation to allow the test to proceed https://webdriver.io/docs/api/dialog/.

How to reproduce the bug.

I have spun up a repository that reproduces this issue here https://github.com/alexanderjkremer/dialog_failure_example

Relevant log output

alexander.kremer dialog_failure_example % yarn wdio      

Execution of 1 workers started at 2025-10-21T15:20:03.596Z

2025-10-21T15:20:03.611Z INFO @wdio/cli:launcher: Run onPrepare hook
2025-10-21T15:20:03.612Z INFO @wdio/utils: Setting up browser driver for: chrome@stable
2025-10-21T15:20:03.612Z INFO @wdio/utils: Setting up browser binaries for: chrome@stable
2025-10-21T15:20:03.830Z INFO webdriver: Using Chromedriver v141.0.7390.108 from cache directory /var/folders/v1/7l2spjj90xbdpv3q6fm6r5040000gq/T
2025-10-21T15:20:03.831Z INFO @wdio/cli:launcher: Run onWorkerStart hook
2025-10-21T15:20:03.832Z INFO @wdio/xvfb: XvfbManager.init() called
2025-10-21T15:20:03.832Z INFO @wdio/xvfb: Xvfb not needed on current platform
2025-10-21T15:20:03.832Z INFO @wdio/local-runner: Start worker 0-0 with arg: run ./wdio.conf.ts
2025-10-21T15:20:03.856Z INFO @wdio/xvfb:ProcessFactory: xvfb-run not found, falling back to regular fork
2025-10-21T15:20:03.857Z INFO @wdio/xvfb:ProcessFactory: ProcessFactory: shouldRun=false, isAvailable=false
2025-10-21T15:20:03.857Z INFO @wdio/xvfb:ProcessFactory: Creating worker process with regular fork
[0-0] 2025-10-21T15:20:04.277Z INFO @wdio/local-runner: Run worker command: run
[0-0] RUNNING in chrome - file:///test/specs/test.e2e.ts
[0-0] 2025-10-21T15:20:04.321Z INFO webdriver: Initiate new session using the WebDriver protocol
[0-0] 2025-10-21T15:20:04.426Z INFO webdriver: Using Chromedriver v141.0.7390.108 from cache directory /var/folders/v1/7l2spjj90xbdpv3q6fm6r5040000gq/T
[0-0] 2025-10-21T15:20:04.444Z INFO chromedriver: Starting ChromeDriver 141.0.7390.108 (79abd1fdb9fb181f228c16000a90806ceaa09fc5-refs/branch-heads/7390@{#2245}) on port 58200
[0-0] 2025-10-21T15:20:04.445Z INFO chromedriver: Remote connections are allowed by an allowlist (0.0.0.0).
[0-0] 2025-10-21T15:20:04.445Z INFO chromedriver: Please see https://chromedriver.chromium.org/security-considerations for suggestions on keeping ChromeDriver safe.
[0-0] 2025-10-21T15:20:04.459Z INFO chromedriver: ChromeDriver was started successfully on port 58200.
[0-0] 2025-10-21T15:20:04.536Z INFO @wdio/utils: Started Chromedriver v141.0.7390.108 with params --port=58200 --allowed-origins=* --allowed-ips=0.0.0.0 in 147ms on port 58200
[0-0] 2025-10-21T15:20:04.538Z INFO webdriver: [POST] http://localhost:58200/session
[0-0] 2025-10-21T15:20:05.859Z INFO webdriver: Register BiDi handler for session with id 19ec59fc4afd46accbd03da0e9601336
[0-0] 2025-10-21T15:20:05.859Z INFO webdriver: Connecting to webSocketUrl ws://127.0.0.1:58200/session/19ec59fc4afd46accbd03da0e9601336
[0-0] 2025-10-21T15:20:05.865Z INFO webdriver: Connected to Bidi protocol at ws://127.0.0.1:58200/session/19ec59fc4afd46accbd03da0e9601336
[0-0] 2025-10-21T15:20:05.865Z INFO webdriver: Connected to WebDriver Bidi interface at ws://127.0.0.1:58200/session/19ec59fc4afd46accbd03da0e9601336
[0-0] 2025-10-21T15:20:05.865Z INFO webdriver: COMMAND getWindowHandle()
[0-0] 2025-10-21T15:20:05.866Z INFO webdriver: BIDI COMMAND browsingContext.getTree {}
[0-0] 2025-10-21T15:20:05.866Z INFO webdriver: BIDI COMMAND session.subscribe {"events":["browsingContext.contextCreated"]}
[0-0] 2025-10-21T15:20:05.867Z INFO webdriver: BIDI COMMAND session.subscribe {"events":["log.entryAdded","browsingContext.navigationStarted"]}
[0-0] 2025-10-21T15:20:05.867Z INFO webdriver: BIDI COMMAND script.addPreloadScript { functionDeclaration: <PreloadScript[1319 bytes]>, contexts: undefined }
[0-0] 2025-10-21T15:20:05.867Z INFO webdriver: BIDI COMMAND session.subscribe {"events":["browsingContext.navigationStarted","browsingContext.fragmentNavigated","network.responseCompleted","network.beforeRequestSent","network.fetchError"]}
[0-0] 2025-10-21T15:20:05.867Z INFO webdriver: BIDI COMMAND session.subscribe {"events":["browsingContext.userPromptOpened"]}
[0-0] 2025-10-21T15:20:05.867Z INFO webdriver: BIDI COMMAND session.subscribe {"events":["browsingContext.navigationStarted"]}
[0-0] 2025-10-21T15:20:05.867Z INFO webdriver: [GET] http://localhost:58200/session/19ec59fc4afd46accbd03da0e9601336/window
[0-0] 2025-10-21T15:20:05.870Z INFO webdriver: RESULT 529C6387D65EE4DBB4CA22DB512DB70E
[0-0] 2025-10-21T15:20:05.872Z INFO webdriver: BIDI RESULT {"id":1,"result":{"contexts":[{"children":[],"clientWindow":"869707164","context":"529C6387D65EE4DBB4CA22DB512DB70E","originalOpener":null,"parent":null,"url":"about:blank","userContext":"default"}]},"type":"success"}
[0-0] 2025-10-21T15:20:05.872Z INFO webdriverio:PolyfillManager: Adding polyfill script to context with id 529C6387D65EE4DBB4CA22DB512DB70E
[0-0] 2025-10-21T15:20:05.872Z INFO webdriver: BIDI COMMAND script.callFunction {"functionDeclaration":"<Function[443 bytes] webdriverioPolyfill>","target":{"children":[],"clientWindow":"869707164","context":"529C6387D65EE4DBB4CA22DB512DB70E","originalOpener":null,"parent":null,"url":"about:blank","userContext":"default"},"awaitPromise":false}
[0-0] 2025-10-21T15:20:05.872Z INFO webdriver: BIDI COMMAND script.addPreloadScript { functionDeclaration: <PreloadScript[443 bytes]>, contexts: ["529C6387D65EE4DBB4CA22DB512DB70E"] }
[0-0] 2025-10-21T15:20:05.873Z INFO webdriver: BIDI RESULT {"id":2,"result":{"subscription":"b3de7bec-de9e-44df-8f52-231cc3cd0f0a"},"type":"success"}
[0-0] 2025-10-21T15:20:05.873Z INFO webdriver: BIDI RESULT {"id":3,"result":{"subscription":"fe87d2dc-e0b3-46db-96c7-2c57121e9bd5"},"type":"success"}
[0-0] 2025-10-21T15:20:05.874Z INFO webdriver: BIDI RESULT {"id":4,"result":{"script":"256c6572-1fba-4d01-9cbe-f60073c82a73"},"type":"success"}
[0-0] 2025-10-21T15:20:05.874Z INFO webdriver: BIDI RESULT {"id":5,"result":{"subscription":"3e14d202-495d-4260-abd9-623be2cdab77"},"type":"success"}
[0-0] 2025-10-21T15:20:05.874Z INFO webdriver: BIDI RESULT {"id":6,"result":{"subscription":"08dbaa48-62c8-40a3-ae73-6b55cbd23151"},"type":"success"}
[0-0] 2025-10-21T15:20:05.875Z INFO webdriver: BIDI RESULT {"id":7,"result":{"subscription":"9eeafb81-ff61-42bd-bc8a-aac4530041f5"},"type":"success"}
[0-0] 2025-10-21T15:20:05.884Z INFO webdriver: BIDI RESULT {"id":8,"result":{"realm":"5711475410991168972.1535680629721876780","result":{"type":"undefined"},"type":"success"},"type":"success"}
[0-0] 2025-10-21T15:20:05.884Z INFO webdriver: BIDI RESULT {"id":9,"result":{"script":"bd071719-5a51-4d39-81de-8c39ee56a958"},"type":"success"}
[0-0] 2025-10-21T15:20:05.889Z INFO webdriver: COMMAND navigateTo("file:///Users/alexander.kremer/Documents/dialog_failure_example/index.html")
[0-0] 2025-10-21T15:20:05.889Z INFO webdriver: [POST] http://localhost:58200/session/19ec59fc4afd46accbd03da0e9601336/url
[0-0] 2025-10-21T15:20:05.889Z INFO webdriver: DATA {
[0-0]   url: 'file:///Users/alexander.kremer/Documents/dialog_failure_example/index.html'
[0-0] }
[0-0] 2025-10-21T15:20:05.971Z INFO webdriver: RESULT null
[0-0] 2025-10-21T15:20:05.972Z INFO webdriver: BIDI COMMAND browsingContext.locateNodes {"locator":{"type":"css","value":"input"},"context":"529C6387D65EE4DBB4CA22DB512DB70E"}
[0-0] 2025-10-21T15:20:05.978Z INFO webdriver: BIDI RESULT {"id":10,"result":{"nodes":[{"sharedId":"f.529C6387D65EE4DBB4CA22DB512DB70E.d.6B5671D786BEB59C892B800312FE737A.e.2","type":"node","value":{"attributes":{"id":"name","name":"name","type":"text"},"childNodeCount":0,"localName":"input","namespaceURI":"http://www.w3.org/1999/xhtml","nodeType":1,"shadowRoot":{"sharedId":"f.529C6387D65EE4DBB4CA22DB512DB70E.d.6B5671D786BEB59C892B800312FE737A.e.4","type":"node","value":{"childNodeCount":1,"mode":"closed","nodeType":11}}}}]},"type":"success"}
[0-0] 2025-10-21T15:20:05.982Z INFO webdriver: BIDI COMMAND browsingContext.locateNodes {"locator":{"type":"css","value":"input"},"context":"529C6387D65EE4DBB4CA22DB512DB70E"}
[0-0] 2025-10-21T15:20:05.987Z INFO webdriver: BIDI RESULT {"id":11,"result":{"nodes":[{"sharedId":"f.529C6387D65EE4DBB4CA22DB512DB70E.d.6B5671D786BEB59C892B800312FE737A.e.2","type":"node","value":{"attributes":{"id":"name","name":"name","type":"text"},"childNodeCount":0,"localName":"input","namespaceURI":"http://www.w3.org/1999/xhtml","nodeType":1,"shadowRoot":{"sharedId":"f.529C6387D65EE4DBB4CA22DB512DB70E.d.6B5671D786BEB59C892B800312FE737A.e.4","type":"node","value":{"childNodeCount":1,"mode":"closed","nodeType":11}}}}]},"type":"success"}
[0-0] 2025-10-21T15:20:05.989Z INFO webdriver: BIDI COMMAND browsingContext.locateNodes {"locator":{"type":"css","value":"input"},"context":"529C6387D65EE4DBB4CA22DB512DB70E"}
[0-0] 2025-10-21T15:20:05.991Z INFO webdriver: BIDI RESULT {"id":12,"result":{"nodes":[{"sharedId":"f.529C6387D65EE4DBB4CA22DB512DB70E.d.6B5671D786BEB59C892B800312FE737A.e.2","type":"node","value":{"attributes":{"id":"name","name":"name","type":"text"},"childNodeCount":0,"localName":"input","namespaceURI":"http://www.w3.org/1999/xhtml","nodeType":1,"shadowRoot":{"sharedId":"f.529C6387D65EE4DBB4CA22DB512DB70E.d.6B5671D786BEB59C892B800312FE737A.e.4","type":"node","value":{"childNodeCount":1,"mode":"closed","nodeType":11}}}}]},"type":"success"}
[0-0] 2025-10-21T15:20:05.992Z INFO webdriver: BIDI COMMAND browsingContext.locateNodes {"locator":{"type":"css","value":"input"},"context":"529C6387D65EE4DBB4CA22DB512DB70E"}
[0-0] 2025-10-21T15:20:05.998Z INFO webdriver: BIDI RESULT {"id":13,"result":{"nodes":[{"sharedId":"f.529C6387D65EE4DBB4CA22DB512DB70E.d.6B5671D786BEB59C892B800312FE737A.e.2","type":"node","value":{"attributes":{"id":"name","name":"name","type":"text"},"childNodeCount":0,"localName":"input","namespaceURI":"http://www.w3.org/1999/xhtml","nodeType":1,"shadowRoot":{"sharedId":"f.529C6387D65EE4DBB4CA22DB512DB70E.d.6B5671D786BEB59C892B800312FE737A.e.4","type":"node","value":{"childNodeCount":1,"mode":"closed","nodeType":11}}}}]},"type":"success"}
[0-0] 2025-10-21T15:20:06.000Z INFO webdriver: COMMAND elementClear("f.529C6387D65EE4DBB4CA22DB512DB70E.d.6B5671D786BEB59C892B800312FE737A.e.2")
[0-0] 2025-10-21T15:20:06.000Z INFO webdriver: [POST] http://localhost:58200/session/19ec59fc4afd46accbd03da0e9601336/element/f.529C6387D65EE4DBB4CA22DB512DB70E.d.6B5671D786BEB59C892B800312FE737A.e.2/clear
[0-0] 2025-10-21T15:20:06.026Z INFO webdriver: RESULT null
[0-0] 2025-10-21T15:20:06.026Z INFO webdriver: COMMAND elementSendKeys("f.529C6387D65EE4DBB4CA22DB512DB70E.d.6B5671D786BEB59C892B800312FE737A.e.2", "a")
[0-0] 2025-10-21T15:20:06.026Z INFO webdriver: [POST] http://localhost:58200/session/19ec59fc4afd46accbd03da0e9601336/element/f.529C6387D65EE4DBB4CA22DB512DB70E.d.6B5671D786BEB59C892B800312FE737A.e.2/value
[0-0] 2025-10-21T15:20:06.026Z INFO webdriver: DATA { text: 'a' }
[0-0] 2025-10-21T15:20:06.091Z INFO webdriver: RESULT null
[0-0] 2025-10-21T15:20:06.092Z INFO webdriver: BIDI COMMAND browsingContext.navigate {"context":"529C6387D65EE4DBB4CA22DB512DB70E","url":"https://google.com","wait":"complete"}
[0-0] 2025-10-21T15:20:06.133Z INFO webdriver: BIDI COMMAND browsingContext.handleUserPrompt {"accept":false,"context":"529C6387D65EE4DBB4CA22DB512DB70E"}
[0-0] 2025-10-21T15:20:06.139Z INFO webdriver: BIDI RESULT {"error":"no such alert","id":15,"message":"No dialog is showing","type":"error"}
[0-0] 2025-10-21T15:20:08.204Z INFO webdriver: BIDI RESULT {"id":14,"result":{"navigation":"6c2ed636-ec7a-4b90-80d3-3f0df45a73a3","url":"https://www.google.com/?zx=1761060006632&no_sw_cr=1"},"type":"success"}
[0-0] Error in "My Login application should change URL to Google and fail on "Leave this site" dialog"
Unhandled promise rejection: Error: WebDriver Bidi command "browsingContext.handleUserPrompt" failed with error: no such alert - No dialog is showing
[0-0] 2025-10-21T15:20:08.206Z INFO webdriver: COMMAND deleteSession()
[0-0] 2025-10-21T15:20:08.207Z INFO webdriver: [DELETE] http://localhost:58200/session/19ec59fc4afd46accbd03da0e9601336
[0-0] 2025-10-21T15:20:08.267Z INFO webdriver: RESULT null
[0-0] 2025-10-21T15:20:08.267Z INFO webdriver: Close Bidi connection to ws://127.0.0.1:58200/session/19ec59fc4afd46accbd03da0e9601336
[0-0] 2025-10-21T15:20:08.267Z INFO webdriver: Kill driver process with PID 71675
[0-0] FAILED in chrome - file:///test/specs/test.e2e.ts
2025-10-21T15:20:08.390Z INFO @wdio/cli:launcher: Run onWorkerEnd hook

 "spec" Reporter:
------------------------------------------------------------------
[chrome 141.0.7390.108 mac #0-0] Running: chrome (v141.0.7390.108) on mac
[chrome 141.0.7390.108 mac #0-0] Session ID: 19ec59fc4afd46accbd03da0e9601336
[chrome 141.0.7390.108 mac #0-0]
[chrome 141.0.7390.108 mac #0-0] » test/specs/test.e2e.ts
[chrome 141.0.7390.108 mac #0-0] My Login application
[chrome 141.0.7390.108 mac #0-0]    ✓ should navigate to index.html and modify the input
[chrome 141.0.7390.108 mac #0-0]    ✖ should change URL to Google and fail on "Leave this site" dialog
[chrome 141.0.7390.108 mac #0-0]
[chrome 141.0.7390.108 mac #0-0] 1 passing (2.3s)
[chrome 141.0.7390.108 mac #0-0] 1 failing
[chrome 141.0.7390.108 mac #0-0]
[chrome 141.0.7390.108 mac #0-0] 1) My Login application should change URL to Google and fail on "Leave this site" dialog
[chrome 141.0.7390.108 mac #0-0] Unhandled promise rejection: Error: WebDriver Bidi command "browsingContext.handleUserPrompt" failed with error: no such alert - No dialog is showing


Spec Files:	 0 passed, 1 failed, 1 total (100% completed) in 00:00:04  

2025-10-21T15:20:08.390Z INFO @wdio/local-runner: Shutting down spawned worker
2025-10-21T15:20:08.643Z INFO @wdio/local-runner: Waiting for 0 to shut down gracefully
2025-10-21T15:20:08.643Z INFO @wdio/local-runner: shutting down
2025-10-21T15:20:08.644Z INFO @wdio/cli:launcher: Run onComplete hook

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