@@ -0,0 +1,26 @@
+/**
+ * @param {string} s
+ * @return {boolean}
+ */
+var isValid = function(s) {
+    const opener = ['[', '(', '{'];
+    const closerPair = {
+        ']': '[',
+        ')': '(',
+        '}': '{'
+    }
+
+    const stack = []
+    let isValid = true;
+    for ( const char of s ) {
+        if ( opener.includes( char ) ) {
+            stack.push( char );
+        } else if ( closerPair[char] === stack[stack.length - 1] ) {
+            stack.pop();
+        } else {
+            isValid = false;
+        }
+    }
+
+    return stack.length === 0 && isValid;
+};