JSFiddle - React, Tailwind, and code Playground
HTML
<head>
<body>
</body>
</head>JavaScript
g("((())");
function g(s) {
var a = s.split("");
var b = [];
for (var i = 0; i < a.length; i++) {
if (a[i] == '(') {b.push('*');}
if (a[i] == ')') {if (b.length > 0) b.pop();}
}
alert(b.length)
return b.length;
}