kcristella kcristella - 1 year ago 456
Javascript Question

Bootstrap Typeahead Only Allow List Values

I was wondering if it's possible to limit a users selection to the predefined date-source items for a Bootstrap Typeahead item? So if the user types something that is not in the data-source, a message should be displayed notifying them of such.

Here's the demo: http://cruiseoutlook.com/test

Any help would be appreciated. Thanks!

Answer Source

If I understand, when the typeahead component loses the focus, the user should be alerted that its input is invalid if it is not in the list?

The code will thus be something like this :

var myData = [...]; // This array will contain all your possible data for the typeahead

$("#my-type-ahead").typeahead({source : myData})

function validateSelection() {
    if(source.indexOf($(this).val()) === -1) 
        alert('Error : element not in list!');

Just be careful about the fact that indexOf is not implemented in IE6-8. But shims can be found, for example : Best way to find if an item is in a JavaScript array? .