electron/docs/api/structures/window-open-handler-response.md

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# WindowOpenHandlerResponse Object
* `action` string - Can be `allow` or `deny`. Controls whether new window should be created.
* `overrideBrowserWindowOptions` BrowserWindowConstructorOptions (optional) - Allows customization of the created window.
* `outlivesOpener` boolean (optional) - By default, child windows are closed when their opener is closed. This can be
changed by specifying `outlivesOpener: true`, in which case the opened window will not be closed when its opener is closed.
* `createWindow` (options: BrowserWindowConstructorOptions) => WebContents (optional) - If specified, will be called instead of `new BrowserWindow` to create the new child window and event [`did-create-window`](../web-contents.md#event-did-create-window) will not be emitted. Constructed child window should use passed `options` object. This can be used for example to have the new window open as a BrowserView instead of in a separate window.