Leetcode - 392. Is Subsequence

https://leetcode.com/problems/is-subsequence/

Solution 1

/**
 * @param {string} s
 * @param {string} t
 * @return {boolean}
 */
var isSubsequence = function (s, t) {
  let k = 0;

  for (let i = 0; i < t.length; i++) {
    if (s[k] === t[i]) {
      k++;
    }
  }

  return k === s.length;
};