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Graph/assume-window-open-success

AntiPattern

Window Open Null Handling

assume-window-open-success

window.open from third-party or cross-origin contexts returns null (e.g., due to COOP/noopener or non-user-initiated calls), so downstream code assumes a live window and crashes or misbehaves—especially on Mobile Safari/WASM-limited environments.

Node Details

Public graph metadata

Updated6/29/2026

Connections

30 linked nodes

MATCHESSolution

We can temporarily fix this by overriding the behavior using css. — html body[data-scroll-locked]. Tension: the automatic scroll lock when opening a menu. Outcome: overflow: visible !important; margin-right: 0 !important;.

MATCHESSolution

if (!open) { return; }. Tension: If the popover is closed, there is no need to measure. Outcome: rowVirtualizer.measure();.

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Handle Radix Popover’s onOpenAutoFocus (or equivalent) and call event.preventDefault() to prevent the Popover from stealing focus from the Input when it opens.

MATCHESSolution

Ensure background.js is not imported into the content script; move shared variables/code into the content script (or a separate shared module) so background.js only runs in the service worker, and apply the Sentry.WINDOW.document workaround there.

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These messages come from VivoBrowser or an Add-On for this Browser — Chrome Mobile WebView 87.0.4280 on Android. Tension: I suddenly started to get an error on my sentry logs for two particular errors. Outcome: which uses own injected JS-Code on web pages viewed.

MATCHESSolution

Create a button to your app like this — Add this code in a script tag. Tension: See if this detects an error. Outcome: window.onerror = function(msg, url, linenumber) {.

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Received the exact same error in Sentry. — I'm getting it from a user on Mobile Safari on iPhone. Tension: where the third-party stuff is more limited.

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Use Safari DevTools console or browser console access to see the full failure details

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The only option is to have the app open those links in native Safari on mobile — use the universal link.

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In Rolldown-Vite. Tension: Since you did not provide extra targets for your project, it worked with the default targets. Outcome: it will not make your code compatible with older browsers.

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https://bugs.webkit.org/show_bug.cgi?id=301994 — iOS 26.1.

MATCHESSolution

Try opening it from incognito maybe — Do you have any extensions active? Outcome: issue is a local issue to my computer.

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the content of the dock gets changed according to the new chat room (even though it's only for a split second) then closes — When I'm in one of the chat rooms, I can change chat rooms by clicking on the other chat rooms. Outcome: place the navigation action in a short timeout so it's placed at the end of Javascript's event loop and allows the dispatched actions to process and React to rerender once.

MATCHESSolution

Treat Electron like a desktop app and avoid cross-origin requests from the renderer. As a workaround, remove the outgoing `Origin` header using `session.defaultSession.webRequest.onBeforeSendHeaders`. Prefer proxying API calls through the main process (e.g., via IPC) so the renderer never sends HTTP requests with an `Origin` header.

MATCHESSolution

Use a real sandboxing mechanism (e.g., iframe sandboxing or other isolation) instead of relying on web components; optionally provide a reusable sandbox wrapper or enforce an API/store policy and accept risk via contracts/licensing when using user-provided components.

MATCHESSolution

Adjust/remedy the COOP configuration so the iframe/popup context does not enter the 'new with no opener' rule (e.g., relax COOP or ensure same-origin/top-level origin alignment), so window.open will return a window reference instead of null.

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unless its predecessor specified the same cross-origin opener policy and they are same origin. — same-origin-allow-popups. Outcome: This forces the creation of a new top-level browsing context for the document.

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Try it yourself in your Developer Console (aka Browser Console or JavaScript Console; press F12). Outcome: it will still work.

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using the following Frida script — when it involves the WebView component. Tension: WebView component which triggers an onReceivedError (ERR_FAILED). Outcome: Calling handler.proceed().

MATCHESSolution

it's worth considering if you need an effect here in the first place — if your inner dialog has an onOpen event you can tap into. Tension: as using that would be better to call your `onOpen` callback. Outcome: using that would be better to call your `onOpen` callback.

MATCHESSolution

Track the previous `open` value using a `ref` and only invoke `onOpen` when `open` is `true` and the previous value was `false` (e.g., `if (open && !prevOpenRef.current) onOpen();`), while still including `onOpen` in the dependencies.

MATCHESSolution

Use the correct iframe load lifecycle event (e.g., `loadedmetadata`/appropriate ready event) before calling `contentWindow.postMessage`. Fix the origin check by using the correct/static expected parent URL (or validate/log `event.origin` before returning) so messages aren’t discarded.

MATCHESSolution

Treat Google Apps Script Web Apps as having quirky, undocumented front-end limitations related to iframe/HTML behavior; follow the official HTML Service best practices/restrictions and adjust the deployment approach (or move away from GAS Web Apps for the UI) until the layout stabilizes.

MATCHESSolution

Per suggestion from @ataman comment I used useEffect() instead of winow.onload — on both web browsers, PC and mobile. Tension: it works on both web browsers, PC and mobile.

MATCHESSolution

Use other browsers that support the operation

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everything now works as expected — Rather than disabling it. Tension: Safari is tripping the abusive behavior detection. Outcome: setting `overheadDataThreshold="2048"`.

MATCHESSolution

Try using JxBrowser DOM API as shown in the code below: — browser.mainFrame().ifPresent(frame -> {. Outcome: CustomEvent event = document.createCustomEvent( EventType.of("GTWEvent"), eventParams); document.dispatch(event);.

MATCHESSolution

click on the red empty area and type "thisisunsafe" — when I tried to open the ngRok url. Outcome: the solution I found was to click on the red empty area and type "thisisunsafe".

MATCHESSolution

Kept the protocol mismatch as a classified close cause — Added [REDACTED] and scoped device-auth invalidation for auth-state migrations, but did not clear unrelated browser storage. Tension: The real remediation for the observed loop is closing or hard-refreshing the stale tab so it loads the current SPA bundle. Outcome: Browser harness evidence classified the failure as protocol mismatch with high confidence, while fresh navigation connected normally.

MATCHESSolution

Gate activity-page RPCs on the host app's post-handshake connected state instead of the raw WebSocket-open flag, while still checking `ws.readyState === 1` — activity-page RPCs. Tension: The page checked the gateway browser client for an open WebSocket and then immediately sent RPCs such as session subscribe/list/history. Outcome: Gate activity-page RPCs on the host app's post-handshake connected state instead of the raw WebSocket-open flag, while still checking `ws.readyState === 1`.

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