Checking for a subsequence in a string

It is necessary to implement a function that determines whether the characters of one string appear in another string in the same order, but not necessarily contiguously.

function isSubsequence(pattern, text) {
  return false;
}

// Usage examples:
isSubsequence('whe', 'cartwheel')   // true
isSubsequence('crt', 'cartwheel')   // true
isSubsequence('ctr', 'cartwheel')   // false
isSubsequence('weee', 'cartwheel')  // false