var isSubsequence = function (s, t) {
let i = 0; // T
let j = 0; // S
let isMatchFound = false;
while (i < t.length) {
if (t[i] === s[j]) {
i++;
j++;
} else {
i++;
}
if (j === s.length) {
isMatchFound = true;
}
}
return isMatchFound;
};
console.log(isSubsequence("abc", "ahbgdc"));