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<!DOCTYPE html> <html> <body> <button onclick="openWin()">Open "myWindow"</button> <button onclick="closeWin()">Close "myWindow"</button> <script> let myWindow; function openWin() { myWindow = window.open("", "", "width=200,height=100"); } function closeWin() { myWindow.close(); } </script> </body> </html>
