Is Subsequence

My Solution

JavaScript / TypeScript

const isSubsequence = (s: string, t: string): boolean => {
  let i = 0,
    j = 0;

  while (i < s.length && j < t.length) {
    if (s[i] === t[j]) {
      i += 1;
      j += 1;
    } else {
      j += 1;
    }
  }

  return i === s.length;
};