如何将当前日期与未来日期进行比较并在 javascript 中对其进行验证
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how to compare current date to a future date and validate it in javascript
提问by iyke
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I have a date text field in mm/dd/yyyy format. When a date is entered, I'd like to validate it to make sure the date is 2 months greater than the current date. If not, I'd like to display a message to notifying the user the date is less then 2 months but user can still proceed with filling the form after the notification.
我有一个 mm/dd/yyyy 格式的日期文本字段。输入日期后，我想对其进行验证以确保该日期比当前日期大 2 个月。如果没有，我想显示一条消息，通知用户日期不到 2 个月，但用户仍然可以在收到通知后继续填写表格。
Below is the form i want to add the function to.
下面是我想向其中添加功能的表单。
回答by Afroza Yasmin
If you used javascript then lets try to this one, It may help you.
如果您使用过 javascript，那么让我们尝试一下，它可能对您有所帮助。
<script type="text/javascript">
var date = new Date();
var month = date.getMonth()+1;
var day = date.getDay();
var year = date.getYear();
var newdate = new Date(year,month,day);
mydate=new Date('2011-04-11');
console.log(newdate);
console.log(mydate)
if(newdate > mydate)
{
alert("greater");
}
else
{
alert("smaller")
}
</script>
回答by Chandan
If your date is in mm/dd/yyyyformat in string then you can use the following method. It will return true if date is 2 months greater than the current date and false otherwise -
如果您的日期是mm/dd/yyyy字符串格式，那么您可以使用以下方法。如果日期比当前日期大 2 个月，它将返回 true，否则返回 false -
// dateString in "mm/dd/yyyy" string format
function checkMonth(dateString)
{
var enteredMS = new Date(dateString).getTime();
var currentMS = new Date().getTime();
var twoMonthMS = new Date(new Date().setMonth(new Date().getMonth() + 2)).getTime();
if(enteredMS >= twoMonthMS)
{
return true;
}
return false;
}
Invoke this as checkMonth("03/12/2016");
调用它作为 checkMonth("03/12/2016");
回答by Basilin Joe
var d1 = new Date();
var d2 = new Date(d1);
console.log(d1 == d2); // prints false (wrong!)
console.log(d1 === d2); // prints false (wrong!)
console.log(d1 != d2); // prints true (wrong!)
console.log(d1 !== d2); // prints true (wrong!)
console.log(d1.getTime() === d2.getTime()); // prints true (correct)Also you can do <,>,>=,<= etc
你也可以做 <,>,>=,<= 等
