Javascript moment.js 或日期验证中的 isSame() 函数
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isSame() function in moment.js or Date Validation
提问by user3050590
I need to validate the date from the user and check if it is in a particular format. If yes, then it will be accepted else it will not be. I am looking for sort of
我需要验证来自用户的日期并检查它是否为特定格式。如果是，那么它将被接受，否则它将不被接受。我正在寻找某种
value.match("regular expression")
The above works fine if, I have to choose from few formats. So, I came across this moment.js and interested in knowing how to use isSame(). I tried implementing it but unsuccessful. Like :
如果我必须从几种格式中进行选择，则上述效果很好。所以，我遇到了这个 moment.js 并有兴趣知道如何使用 isSame()。我尝试实施它但没有成功。喜欢 ：
var x=moment("MM/DD/YYYY") ;
x.isSame("28-02-1999"); // am getting false which is right
var x=moment("28-02-1999","DD-MM-YYYY") ;
x.isSame("28-02-1999"); // am getting false which is wrong
So, please help in that. Thanks
所以，请帮忙。谢谢
回答by DanielST
Docs - Is Same
文档 - 相同
Check if a moment is the same as another moment.
moment('2010-10-20').isSame('2010-10-20'); // trueIf you want to limit the granularity to a unit other than milliseconds, pass the units as the second parameter.
moment('2010-10-20').isSame('2009-12-31', 'year'); // falsemoment('2010-10-20').isSame('2010-01-01', 'year'); // truemoment('2010-10-20').isSame('2010-12-31', 'year'); // truemoment('2010-10-20').isSame('2011-01-01', 'year'); // false
检查一个时刻是否与另一个时刻相同。
moment('2010-10-20').isSame('2010-10-20'); // true如果要将粒度限制为毫秒以外的单位，请将单位作为第二个参数传递。
moment('2010-10-20').isSame('2009-12-31', 'year'); // falsemoment('2010-10-20').isSame('2010-01-01', 'year'); // truemoment('2010-10-20').isSame('2010-12-31', 'year'); // truemoment('2010-10-20').isSame('2011-01-01', 'year'); // false
Your code
你的代码
var x=moment("28-02-1999","DD-MM-YYYY"); // working
x.isSame("28-02-1999"); // comparing x to an unrecognizable string
If you try moment("28-02-1999"), you get an invalid date. So comparing x to an invalid date string returns false.
如果你尝试moment("28-02-1999")，你会得到一个无效的日期。因此，将 x 与无效的日期字符串进行比较会返回 false。
To fix it, either use the default date format(ISO 8601):
要修复它，请使用默认日期格式(ISO 8601)：
var x = moment("28-02-1999","DD-MM-YYYY");
x.isSame("1999-02-28"); // YYYY-MM-DD
Or pass isSamea moment object.
或者传递isSame一个时刻对象。
var x = moment("28-02-1999","DD-MM-YYYY");
x.isSame( moment("28-02-1999","DD-MM-YYYY") );
