Valid Parentheses

ValidParentheses.js

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+// https://www.codewars.com/kata/valid-parentheses
+
+// Write a function called that takes a string of parentheses, and determines if the order of the parentheses is valid. The function should return true if the string is valid, and false if it's invalid.
+
+// Examples
+// "()"              =>  true
+// ")(()))"          =>  false
+// "("               =>  false
+// "(())((()())())"  =>  true
+
+function validParentheses(parens){
+  let str = parens;
+  while(str.indexOf('()') !== -1){
+    str = str.replace('()', '');
+  }
+
+  return str.length === 0;
+}