Leetcode - 125. Valid Palindrome

Javascript Code

/**
 * @param {string} s
 * @return {boolean}
 */
var isPalindrome = function (s) {
    s = s.replace(/[^a-zA-Z0-9]/g, '').toLowerCase();

    let p1 = 0;
    let p2 = s.length - 1;


    while (p1 < p2) {

        if (s[p1] !== s[p2]) {
            return false;
        }
        p1++;
        p2--;
    }
    return true;

};