Here is the script that I am using:

     //Create Autocomplete

    //Uses jquery.ui.autocomplete.html.js extension
    var createAutocomplete = function () {
        var $input = $(this);
        var options = {
            source: $input.attr("data-jax-autocomplete"),
            minLength: 3,
            html: true, 
        };
 
        $input.autocomplete(options)
 

    };