使用 javascript 检查最小日期和最大日期

Question

Having to dates like this '2022-04-30' & '2022-05-30'

using javascript how can evaluate which dates is lower? I tried to convert them to milliseconds but with this format date I dont know how

example

if('2022-04-30' < '2022-05-30') {

// true }

Answer 1

EDIT: As pointed out by @RobG the dates are in the ISO format so there is no need for dates at all:

 if ('2022-04-30' < '2022-05-30') console.log('true')

However this does not work with other date formats, for example:

 if ('30-04-2022' < '30-05-2020') console.log('returns true, but is incorrect') if (new Date('30-04-2022') < new Date('30-05-2020')) console.log('returns false')

ORIGINAL ANSWER: You are trying to compare strings not dates. Try this:

 const date1 = new Date('2022-04-30'); const date2 = new Date('2022-05-30'); if (date1 < date2) { console.log('true'); }

Or shorter:

 if (new Date('2022-04-30') < new Date('2022-05-30')) console.log('true');