Super Reduced String.js

'use strict';

const fs = require('fs');

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

let inputString = '';
let currentLine = 0;

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

process.stdin.on('end', function() {
    inputString = inputString.split('\n');

    main();
});

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

// Complete the superReducedString function below.
function superReducedString(s) {

s=s.split("");
for(var i=0;i<s.length ;i++){
    if(s[i]==s[i+1]){
        s.splice(i,2);
        
        i=0-1;
        
    }
    
}
  if(s.length==0){
    return "Empty String";
  }else{
    return s.join("");
  }

}

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

    const s = readLine();

    const result = superReducedString(s);

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

    ws.end();
}