Configuring nw.Window open with show:false and load timeout behavior

The recommended pattern races a setTimeout against the loaded event and uses win.close() (without true) in the timeout path so the window’s close event fires. Register a close handler guarded by a boolean flag to ensure Node.js resources are cleaned up exactly once. NW.js does not provide a native load‑timeout option for nw.Window.open; behavior such as close(true) event suppression can differ between major version series (e.g., 0.32 vs earlier), so verify the target version.

1. Create the window with show: false: nw.Window.open(url, {show: false}, (win) => { ... })
2. Listen for the loaded event on win.webContents
3. Set a setTimeout with your configurable interval, storing the timer reference
4. In the loaded handler, clear the timeout
5. In the timeout handler, call win.close() (not win.close(true)) to preserve the close‑event cleanup path
6. Register a close handler that runs cleanup once using a flag such as let cleaned = false

let cleaned = false
win.on('loaded', () => {
  clearTimeout(timeoutId)
})
timeoutId = setTimeout(() => {
  if (!cleaned) {
    win.close() // preserves close event; use win.close(true) only if manual cleanup already handled
  }
}, LOAD_TIMEOUT_MS)
win.on('close', () => {
  if (!cleaned) {
    cleaned = true
    // Node.js resource cleanup: clear timers, streams, child processes
  }
})

Assumption: The target NW.js major version supports the loaded event pattern as documented for the 0.32 series; earlier or later versions may differ. Uncertainty: Without testing the exact version, it cannot be guaranteed that win.close(true) suppresses the close event or that Node.js timers started in the window context are terminated automatically.