myPrint() { // 1. 設置要打印的區域 div的className let subOutputRankPrint = document.getElementById("dy"); let newstr = subOutputRankPrint.innerHTML; document.body.innerHTML = newstr; // 2. 設置頁面比例 document.getElementsByTagName("body")[0].style.zoom = 0.68; window.print(); // 3. 還原:將舊的頁面儲存起來,當打印完成後返給給頁面 window.location.reload(); }