Parameters for window.cancelClose. Keep the calling popup open after it received window:beforeClose; ignored when no close is pending. Fails with NOT_FOUND when the caller is not a popup.
window.cancelClose
window:beforeClose
NOT_FOUND
Parameters for
window.cancelClose. Keep the calling popup open after it receivedwindow:beforeClose; ignored when no close is pending. Fails withNOT_FOUNDwhen the caller is not a popup.