by Pawan Kumar @jsartisan
Write a function that takes a string s containing bracket characters: '(', ')', '{', '}', '[', ']'.
Determine if the string is valid by checking these rules:
- Each opening bracket must have a matching closing bracket of the same type
- Brackets must be closed in the proper nested order
- A closing bracket can only close a matching opening bracket
The function should return true for valid bracket strings, and false for invalid ones.
Constraints:
- 1 ≤ s.length ≤ 1000
- s consists of parentheses only '()[]{}'
Examples:
// Example 1:
const s1 = "[]";
console.log(isValid(s1));
// Output: true
// Example 2:
const s2 = "([{}])";
console.log(isValid(s2));
// Output: true
// Example 3:
const s3 = "[(])";
console.log(isValid(s3));
// Output: false
// Explanation: The brackets are not closed in the correct order.
