JavaScript获取默认时间的上一个月

矫情吗；* 2022-12-06 01:05 284阅读 0赞

![9ae190e1a9c19adf1c793f891df1c528.png][]  
主要代码：

date.setMonth(date.getMonth()-1);

var mydateInput = document.getElementById("startTime");
            var date = new Date();
            date.setMonth(date.getMonth()-1);
            var dateString = date.getFullYear() + "-" + (date.getMonth() + 1) + "-" + date.getDate()+ "  "+  "8:00:00";
            mydateInput.value = dateString;
            
            
            var mydateInputs = document.getElementById("endTime");
            var dates = new Date();
            var dateStrings = dates.getFullYear() + "-" + (dates.getMonth() + 1) + "-" + dates.getDate()+ "  "+ "18:00:00";
            mydateInputs.value = dateStrings;

demo示例：

<!DOCTYPE html>
    <html>
        <head>
            <meta charset="UTF-8">
            <title></title>
           
        </head>
    
        <body>
            <input type="text" class="form-control input-medium" placeholder="开始时间" name="" id="startTime" />
            <input type="text" class="form-control input-medium" placeholder="结束时间" name="" id="endTime" />
    
        </body>
        <script type="text/javascript">
          
    
         var mydateInput = document.getElementById("startTime");
            var date = new Date();
            date.setMonth(date.getMonth()-1);
            var dateString = date.getFullYear() + "-" + (date.getMonth() + 1) + "-" + date.getDate()+ "  "+  "8:00:00";
            mydateInput.value = dateString;
            
            
            var mydateInputs = document.getElementById("endTime");
            var dates = new Date();
            var dateStrings = dates.getFullYear() + "-" + (dates.getMonth() + 1) + "-" + dates.getDate()+ "  "+ "18:00:00";
            mydateInputs.value = dateStrings; 
        </script>
    
    </html>

![aa8b7be82dee487424b93ce8dcb514b2.png][]

[9ae190e1a9c19adf1c793f891df1c528.png]: /images/20221123/4fe0446e00644e9c82a89fb6b529126a.png
[aa8b7be82dee487424b93ce8dcb514b2.png]: /images/20221123/b95daac828664db6901ee2bdb6a53527.png