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Graph/coop-window-open-null

Pattern

COOP Window Open Null

coop-window-open-null

COOP and cross-origin opener rules force the browser into a 'new with no opener' window context, so window.open resolves to null in the caller even while the popup appears, breaking parent-to-child scripting assumptions.

Node Details

Public graph metadata

Updated5/5/2026

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30 linked nodes

I am unable to change the statte of the `open`-hook inside the object — I am using Radix-UI and I want to create a service for creating toasts. Tension: After 5 seconds (default value) `onOpenChange`is called to set open=false through a hook. This does not work. Outcome: This does not work.

Dialog box flickers when opening and closing

When triggering a shadcn Dialog from inside a DropDownMenuItem, the dropdown and dialog close at the same time (option 1). Triggering the dialog from an external button keeps the dropdown open instead (option 2).

when SelectContent2 opening then i click to SelectTrigger1 — I have two shadcn/ui Select components. Tension: the content of of SelectContent1 doesn't show immediately. Outcome: Does it contain any blocking stuff like preventDefault or stopPropagation?

I'm trying to prevent it from redirecting to another page when I click to open a dialog. Tension: I want to prevent the page from redirecting when I intend to open the dialog. Outcome: The rendered content remains visually identical, but now the button is rendered outside the link and won't interfere with navigation.

In shadcn/ui Accordion, all items are collapsed by default and the first item is intended to be open initially. Passing defaultValue to the Accordion component did not open the first item.

Using `useRef` inside a hook that needs a reference for a DOM node that may not exist or change during the component's render — popups, dialogs, etc. Tension: may cause stale references or missed updates. Outcome: keeping the state consistent with the latest DOM element.

creates the DB at that version with zero object stores — opened at version N by external code (e.g. headless browser test) without an onupgradeneeded handler. Tension: onupgradeneeded does NOT fire (version matches), so stores are never created. Outcome: All subsequent transactions fail silently or throw "object store not found" errors.

intermittently logged `[REDACTED]` after fresh browser loads and route changes — A custom activity/chat overlay. Tension: The page checked the gateway browser client for an open WebSocket and then immediately sent RPCs such as session subscribe/list/history. Outcome: The client flag represented the raw socket state, not completion of the gateway's first-frame `connect` handshake.

Uncaught (in promise) SubmerchantAuthError: Popup is blocked by browser. — once i click it. Tension: the iFrame that contains the button to "Add Information" displays on the page, but once i click it. Outcome: Even so, a popup does open but shows just a loading indicator.

the redirect would be blocked by browser after successful payment — if I load the addin in a office web (microsoft 365) excel document in the browser. Tension: it is actually trying to navigate the top level window. Outcome: How can i achieve the behavior that the taskpane addin that is hosted inside should only be redirected?

I can't dynamically retrieve the padding attribute of my element — When the menu is closed, the padding should be 0, and when it's opened. Outcome: Currently the only working solution is to hardcode the padding in js.

java.lang.NullPointerException — Netbeans console is showing below error. Tension: Netbeans console is showing below error. Outcome: at com.codename1.io.ConnectionRequest.performOperationComplete(ConnectionRequest.java:935).

chat room content flashes briefly before closing after navigation

In an Electron renderer process, cross-origin fetches behave differently in development vs production, with no expected CORS preflight requests visible in production builds. The user also questions whether Electron enforces browser-style CORS and how `nodeIntegration` affects this behavior.

Is possible to call cl:open by another way? — I need to hide dungerous function(s), for example, cl:open for thirdparty code downloaded from internet. Outcome: There will be more.

When a page is served with Cross-Origin-Opener-Policy: same-origin inside a cross-origin iframe, calling window.open returns null in the parent page console, even though the popup tab opens successfully.

you could write something like `new Function("}, alert(1), function () {")` and have it execute arbitrary code — under V8. Tension: JavaScriptCore could outright crash when fed invalid code to the constructor. Outcome: this actually used to be quite unsafe.

One of the online JavaScript scanners reported exactly that call being suspicious. Tension: I'm trying to understand what are security implications in a call like this in any modern Browser. Outcome: it will still work.

if I click refresh again, the page reloads immediately without showing the dialog — In Firefox, the browser back handling works, and the default dialog shows on refresh. Tension: This behavior does not happen in Chrome or Edge. Outcome: Firefox does not trigger the `beforeunload` event again after the first warning.

I'm unable to interact with the original tab — when switches back to the original tab without closing the print dialog. Tension: Not even right click is working. Outcome: both tabs are blocked.

s a UI library’s dialog component. Tension: If I do that however, then the `onOpen` callback also gets called whenever the `onOpen` callback changes, which is not the behaviour that I want. Outcome: I want it only to be called when the `open` prop changes from `false` to `true`.

In a React app, resizing the browser window causes a parent component to re-render and the child component(s) (e.g., <PaymentOption {...paymentProps} />) to re-render as well, even though the child’s content should not change with layout changes.

TypeError: Cannot read properties of undefined (reading 'ReactCurrentOwner'). Outcome: Has anybody seen this before?

This code will eventually be executed under a web application, meaning it will be accessed concurrently — It reads an Excel file as a template to write data and saves it locally. Tension: The only thing that may looks marignally relevant is calling the static `OPCPackage.open` method. Outcome: there shouldn't be any problem running this code in a multithreaded environment.

navigate does not reload the page when navigating to itself — opening up the exact same page via the same route. Tension: I need it to, because I'm dealing with dozens of fields and submodules that all need to be rebuilt and repopulated.

The window appears, but I can't interact with it and it disappears after a few seconds — I'm trying to get started with SFML (3.0.2) in C++,. Tension: something must be failing during its initialisation. Outcome: it's never reached so it must be failing during the execution of the Window constructor.

nothing is displayed on the pop-up window — When I click on the "sign up with google button".

A web app welcome/onboarding page was shown based on a stale auth session field and a browser localStorage fallback. — Users who had already registered an agent outside the wizard, or whose session payload did not reflect a prior skip/completion. Tension: could still be redirected to the welcome page. Outcome: The intended behavior was to show the page only while the user had neither registered an agent nor skipped/completed the welcome flow.

Agents ignore multi-step workflows in server instructions 40%+ of the time — MCP tool activation across coding agents [redacted:name] VS Code Copilot, Cursor, Codex. Tension: Need cross-platform lifecycle hooks to enforce behavior like "search before debugging" and "contribute after solving.". Outcome: all four major platforms now support them, but with different formats, file locations, and event sets.

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