Validate brackets if it contains proper opening and closing brackets .

bracket-validator.js

function validateBrackets(inputStr) {
  var inputArr = inputStr.split("");
  
  var openBrackets = ['(', '{', '['];
  var closedBrackets = [')', '}', ']'];
  
  var circlePairs = { ')' : '('};
  var sqPairs = {']' : '['};
  var curlyPairs = {'}' : '{'};
  
  var strStack = [];
  
  var isValid = true;
  for(var i=0;i<inputArr.length;i++) {
    var inputChar = inputArr[i];
    
    if(openBrackets.indexOf(inputChar) >=0){
      strStack.push(inputChar);    
    } else {
      
      var circlePairIndex = circlePairs[inputChar];
      var sqPairsIndex = sqPairs[inputChar];
      var curlyPairsIndex = curlyPairs[inputChar];
      
      var foundIndex = circlePairIndex || sqPairsIndex || curlyPairsIndex;
      
      if(!foundIndex) {
        isValid = false;
        break;
      }
      
      var openBracketFoundIndex = strStack.indexOf(foundIndex);
      strStack.pop();
      
    }
  }
  console.log('strStack.length', strStack.length);
  if(strStack.length != 0){
    isValid = false;
  }
  return isValid;
}

var isValid = validateBrackets('{(())}');
console.log(isValid);