Convert binary to decimal

bin2dec.js

function bin2dec(bin){
    bin=bin.toString();
    let binArr = bin.split('');
    binArr = binArr.reverse();
    let dec = 0;
    binArr.forEach((count,index)=>{
        dec+=count*Math.pow(2,index);
    })
    return dec;
}

console.log(bin2dec(10011011));