Suggestion is needed

JavaScript
1

hy i am very new.I start js what i should i learn next ?(which frame work)
I tried problem solving in hacker rank using js, I found the the given syntax is different.or I am not learning properly?
Thanks in Advance…

3

Thank you ,yes now i am learning js ,here’s the hacker rank code:
‘use strict’;

const fs = require('fs');

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(str => str.trim());

    main();
});

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

/*
 * Complete the simpleArraySum function below.
 */
function simpleArraySum(ar) {
    /*
     * Write your code here.
     */

}

function main() {
    const ws = fs.createWriteStream(process.env.OUTPUT_PATH);

    const arCount = parseInt(readLine(), 10);

    const ar = readLine().split(' ').map(arTemp => parseInt(arTemp, 10));

    let result = simpleArraySum(ar);

    ws.write(result + "\n");

    ws.end();
}

i will google for every line that i don’t understand but yet it’s so different from what i am learning…
Thank you for your response