When destructuring an array, you can skip certain items by using blanks:
const dateTime = '2021-02-28T14:57:00';
// Ignore the date part
const [, time] = dateTime.split('T');
// Ignore the seconds
const [hours, minutes, ] = time.split(':');
hours; // '14'
minutes; // '57'
If you are working in a team, then it's a good idea to add comments for skipped items. It also makes the code more readable:
, // date
] = dateTime.split('T');
const [hours, minutes, /* seconds */] = time.split(':');