select2 search - match only words that start with search term

Question

I migrated from chosen to select2 plugin because it works better for me, but its documentation is very poor when compared to chosen. Could anyone tell me what option(s) shou

Answer 1

Select2 provides an example in the documentation on how to use a custom matcher function for matching search terms to search results. The example given is this exact use case.

function matchStart (term, text) {
  if (text.toUpperCase().indexOf(term.toUpperCase()) == 0) {
    return true;
  }
 
  return false;
}
 
$.fn.select2.amd.require(['select2/compat/matcher'], function (oldMatcher) {
  $("select").select2({
    matcher: oldMatcher(matchStart)
  })
});

<link href="//cdnjs.cloudflare.com/ajax/libs/select2/4.0.0/css/select2.css" rel="stylesheet"/>

<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/select2/4.0.0/js/select2.full.js"></script>

<select style="width: 200px">
  <option value="AL">Alabama</option>
  <option value="AK">Alaska</option>
  <option value="AZ">Arizona</option>
</select>

Answer 2

Select2 4.0.0

function matchStart(params, data) {
    params.term = params.term || '';
    if (data.text.toUpperCase().indexOf(params.term.toUpperCase()) == 0) {
        return data;
    }
    return false;
}

$("select").select2({
    matcher: function(params, data) {
        return matchStart(params, data);
    },
});