Find correct close brackets

findBrackets.js

function findBrackets(str){
  var brackets = "{}[]()";
  var result = [];
  var position;
  
  for (var i = 0, max = str.split('').length; i < max; i++) {
    position = brackets.indexOf(str.split('')[i]);
    
    if (position > -1) {
      if (position % 2 === 0) {
        result.push(position + 1);
      } else if (result.pop() !== position) {
          return false;
      }      
    }
    
  }
  return result.length === 0;
}


console.log(findBrackets("(2+2)*{fgdfg/dfgh//}{{{}aaa"));
console.log(findBrackets("(2+2)*{fgdfg/dfgh//}{}aaa"));
console.log(findBrackets("(2+2())*{fgdfg/dfgh//}{}aaa"));
console.log(findBrackets("(2+2{)}*{fgdfg/dfgh//}{}aaa"));