JavaScript how can i compare date strings? compare date strings javascript,compare date strings python,compare date

i need to check whether the date is between minDate and maxDate. but when i try to compare with minDate, i should get valid as false but am getting true..

            let minDate = "27-05-2019";
        let maxDate = "27-05-2019";
        let date = "13-02-2018";
        var valid;

        if(new Date(date.replace( /(\d{2})-(\d{2})-(\d{4})/, "$2/$1/$3")).toDateString() >= new Date(minDate.replace( /(\d{2})-(\d{2})-(\d{4})/, "$2/$1/$3")).toDateString()){
            valid = true;
            } else {
            valid = false;
            }
            
            console.log(valid);

Answer:1

Plain JS solution with a couple of helper functions:

const splitMyDateString = str => {
  const [day, mon, yr] = str.split('-').map(Number);
  return [yr, mon, day];
};

const makeDate = ([yr, mon, day]) => {
  return new Date(yr, mon - 1, day);
};

let minDate = makeDate(splitMyDateString("27-05-2019"));
let maxDate = makeDate(splitMyDateString("27-05-2019"));
let date = makeDate(splitMyDateString("13-02-2018"));
let valid = (date >= minDate) && (date <= maxDate);

Note that the Date constructor is not guaranteed to accept strings accept in the ISO 8601 format. So here we're passing integers instead. Note also we have to subtract 1 from the month because JS months are 0-11, not 1-12.

Answer:2

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