Does Javascript have a built-in function to see if a word is present in a string? I'm not looking for something like indexOf(), but rather:

find_word('test', 'this is a test.') -> true

find_word('test', 'this is a test') -> true

find_word('test', 'I am testing this out') -> false

find_word('test', 'test this out please') -> true

find_word('test', 'attest to that if you would') -> false

Essentially, I'd like to know if my word appears, but not as part of another word. It wouldn't be too hard to implement manually, but I figured I'd ask to see if there's already a built-in function like this, since it seems like it'd be something that comes up a lot.