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<!DOCTYPE html> <html> <body> <button onclick="openWin()">Create window</button> <button onclick="resizeWin()">Resize window</button> <script> let myWindow; function openWin() { myWindow = window.open("", "", "width=100, height=100"); } function resizeWin() { myWindow.resizeBy(250, 250); } </script> </body> </html>
