Matching parentheses in an expression recognizing three pairs of brackets: (), [], and {}

match.js

function match(str){
  var temp = [];
  for(var i = 0; i < str.length; i++){
    var current = str[i];
    var lastChild = temp[temp.length - 1];
    console.log(current, lastChild);
    if(current === '(' || current === '{' || current === '['){
      temp.push(current);
    }
    if(temp.length > 0){
      if(current === ')' && lastChild === '('){
        temp.pop();
      }
      if(current === ']' && lastChild === '['){
        temp.pop();
      }
      if(current === '}' && lastChild === '{'){
        temp.pop();
      }
    } else {
      if(current === ')' || current === '}' || current === ']'){
        temp.push(current);
      }
    }
    console.log(temp);
  }
  return temp <= 0;
}