Add Binary Leet Code JavaScript Solution

Q1:- Add Binary

/**
 * @param {string} a
 * @param {string} b
 * @return {string}
 */


var addBinary = function(a, b) {
    a = a.split('').reverse().join('')
    b = b.split('').reverse().join('')
    let len = Math.max(a.length , b.length)

    let ans = []
    let rem = 0

    for(let i = 0 ; i < len ; i++){

      let charA = i < a.length ? Number(a[i]) : 0
      let charB = i < b.length ? Number(b[i]) : 0

       let sum = charA + charB + rem

      if(sum > 1){
        ans.push(sum % 2)
        rem = 1
      }else{

        ans.push(sum)
         rem = 0;

      }


    }

  if(rem > 0){
    ans.push(rem)

  }
return ans.reverse().join('')
};

 console.log(addBinary("11","1")) // 100
 console.log(addBinary("1010","1011")) // 10101