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<!DOCTYPE html> <html> <body> <p>将时间设置为 90 分钟前后，单击按钮可显示日期。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var d = new Date(); d.setMinutes(d.getMinutes() - 90); document.getElementById("demo").innerHTML=d; } </script> </body> </html>