moment.js日期/时间比较

Question

I have the following code:

var timeCutoff = moment('05:00PM', 'h:mmA').format("MM/DD/YYYY hh:mmA")
var testTime = moment('11:00AM', 'h:mmA').format("MM/DD/YYYY hh:mmA");

if(testTime < timeCutoff){
    console.log(testTime + " before " + timeCutoff);
}
else{
    console.log(testTime + " after " + timeCutoff);
}

The idea here is if now's time is before 5PM, do something. If the time is after 5PM, do something else.

Here is the problem I am experiencing:

testTime is set to ('11:00AM', 'h:mmA') and logs the "after" condition which is unexpected.
testTime is set to ('12:00PM', 'h:mmA') and logs the "after" condition which is unexpected.
testTime is set to ('01:00PM', 'h:mmA') and logs the "before" condition which is expected.
testTime is set to ('09:00PM', 'h:mmA') and logs the "after" condition which is expected.

I'm currently using moment.js 2.17.1

Any suggestions are greatly appreciated. Thanks!

Answer 1

You should use the isBefore() method.

https://momentjs.com/docs/#/query/is-before/

var timeCutoff = moment('05:00PM', 'h:mmA');
var testTime = moment('11:00AM', 'h:mmA');

if(testTime.isBefore(timeCutoff)) {
  console.log(testTime.format("MM/DD/YYYY hh:mmA") + " before " + timeCutoff.format("MM/DD/YYYY hh:mmA"));
}
else
{
  console.log(testTime.format("MM/DD/YYYY hh:mmA") + " after " + timeCutoff.format("MM/DD/YYYY hh:mmA"));
}