Question

How to create an array of dates between a start and end date in JavaScript

Answer 1

let start = new Date("2020-05-01");
let end   = new Date("2020-05-14");
let arr   = [];
 
for (let d = start; d <= end; d.setDate(d.getDate() + 1)) {
    arr.push(d.toString());
}

console.log(arr);

  
  
/*
run:
 
[
  'Fri May 01 2020 00:00:00 GMT+0000 (Coordinated Universal Time)',
  'Sat May 02 2020 00:00:00 GMT+0000 (Coordinated Universal Time)',
  'Sun May 03 2020 00:00:00 GMT+0000 (Coordinated Universal Time)',
  'Mon May 04 2020 00:00:00 GMT+0000 (Coordinated Universal Time)',
  'Tue May 05 2020 00:00:00 GMT+0000 (Coordinated Universal Time)',
  'Wed May 06 2020 00:00:00 GMT+0000 (Coordinated Universal Time)',
  'Thu May 07 2020 00:00:00 GMT+0000 (Coordinated Universal Time)',
  'Fri May 08 2020 00:00:00 GMT+0000 (Coordinated Universal Time)',
  'Sat May 09 2020 00:00:00 GMT+0000 (Coordinated Universal Time)',
  'Sun May 10 2020 00:00:00 GMT+0000 (Coordinated Universal Time)',
  'Mon May 11 2020 00:00:00 GMT+0000 (Coordinated Universal Time)',
  'Tue May 12 2020 00:00:00 GMT+0000 (Coordinated Universal Time)',
  'Wed May 13 2020 00:00:00 GMT+0000 (Coordinated Universal Time)',
  'Thu May 14 2020 00:00:00 GMT+0000 (Coordinated Universal Time)'
]

*/

 

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Answer 2

let start = new Date("2020-05-01");
let end   = new Date("2020-05-14");
let arr   = [];
 
do {
   arr.push(new Date(start));
   start.setDate(start.getDate() + 1);
} while(start <= end)

console.log(arr);

  
  
/*
run:
 
[
  2020-05-01T00:00:00.000Z,
  2020-05-02T00:00:00.000Z,
  2020-05-03T00:00:00.000Z,
  2020-05-04T00:00:00.000Z,
  2020-05-05T00:00:00.000Z,
  2020-05-06T00:00:00.000Z,
  2020-05-07T00:00:00.000Z,
  2020-05-08T00:00:00.000Z,
  2020-05-09T00:00:00.000Z,
  2020-05-10T00:00:00.000Z,
  2020-05-11T00:00:00.000Z,
  2020-05-12T00:00:00.000Z,
  2020-05-13T00:00:00.000Z,
  2020-05-14T00:00:00.000Z
]

*/

 

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