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<html><body><h1>HTML DOM Events</h1><h2>The beforeprint Event</h2><p>Use the addEventListener() method to attach a "beforeprint" event to the window object.</p><h3>Print this document!</h3><p><b>Tip</b>: The keyboard shortcut Ctrl+P prints a page.</p><script>window.addEventListener("beforeprint", myFunction);function myFunction() { alert("You are about to print this document!");}</script></body></html>