Adding force selection option to typeAhead (enhancement)

[PetrSnobelt]

I can't find any way how to force user to select value, so I'd like this feature

option: forceSelection (default value false)

When on blur event is triggered and no match is found in items input
is emptied, when one or more matches are found first value will
be set as input value.

details twbs/bootstrap#4937

[jharding]

Functionally, this request seems very similar to #32. I'm going to resolve as a duplicate. Let me know if you disagree.