checks that brackets are properly closed, in order

brackets.js

function bracketChecker(str){
  let match = {"}":"{", "]":"[", ")":"("}
  let opening = ["(", "[", "{"]
  let toClose = []
  for (let i = 0; i < str.length; i++){
    if (opening.includes(str[i])){
      toClose.push(str[i])
    } else {
      if (toClose[toClose.length-1] !== match[str[i]]){
        return false
      } else {
        toClose.pop()
      }
    }
  }
  return true
}

console.log(bracketChecker("()({[()()]})")) //true
console.log(bracketChecker("()({[(()])})")) //false, mismatch open-close
console.log(bracketChecker("()({[()()])")) //false, mismatch count
console.log(bracketChecker("(({[()()])")) //false
console.log(bracketChecker("[({})]")) //true
console.log(bracketChecker("[({}])]")) //false
console.log(bracketChecker("[]()[]"))//true
console.log(bracketChecker("[}]{}"))//false