bootstrap typeahead - changing source

You have to update the data field associated as indicated here :

$("selector").data('typeahead').source = list2;

None of these answers worked for me when using the Bootstrap-3-Typeahead library. I was able to update the source by destroy the initialized typeahead and re initializing it with a new source:

    $(".typeahead").typeahead("destroy");
    $(".typeahead").typeahead({ source: result });

I'm not sure I understand your situation right, but as you said "and depend on the case, I'd like to have the typeahead workingin with a different source.", I think you can use a function as a source to typeahead instead of an array. Like so:

function typeAheadSourceFunc(inputText) {
  if(inputText.length === 1) {
    return ['Amsterdam', 'Washington', 'Sydney', 'Beijing', 'Cairo'];
  } else {
    return ['OtherAmsterdam', 'OtherWashington', 'OtherSydney'];                  
  }
}
$("SOMESELECTORHERE").typeahead({ source: typeAheadSourceFunc });

typeAheadSourceFunc in this example will fire every time a keypressed fires on input and returns a different source. You probably can handle your situation there.

p.s: I am using bootstrap3-typeahead.js v4.0.2

Unfortunately, the accepted answer didn't work for me. It could be an issue with newer versions of the library. For me, data('typeahead') isn't defined - instead there is data('ttTypeahead') and data('ttAttrs'). Neither of those has a source attribute.

After some code reading I came up with this: $('selector').data('ttTypeahead').dropdown.datasets[0].source = mySourceFunction

And it seems to work. There might be instances where more than one dataset is defined, though.