HackerRank Day 6: JavaScript Dates 10 Days of javascript solution

In this HackerRank Day 6: javascript dates 10 days of javascript problem you have Given a date string, dateString, in the format MM/DD/YYYY, find and return the day name for that date. Each day name must be one of the following strings: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, or Saturday. For example, the day name for the date 12/07/2016 is Wednesday.

HackerRank Day 6: Javascript Dates 10 Days of javascript problem solution.

'use strict';

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', inputStdin => {
    inputString += inputStdin;
});

process.stdin.on('end', _ => {
    inputString = inputString.trim().split('\n').map(string => {
        return string.trim();
    });
    
    main();    
});

function readLine() {
    return inputString[currentLine++];
}

// The days of the week are: "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
function getDayName(dateString) {
    const date = new Date(dateString);

    const options = {
      weekday: 'long'
    };
  
    return new Intl.DateTimeFormat('en-Us', options).format(date);
}


function main() {
    const d = +(readLine());
    
    for (let i = 0; i < d; i++) {
        const date = readLine();
        
        console.log(getDayName(date));
    }
}