无法获得typeahead.js示例来上班

Question

I'm trying out the basic example given at typeahead.js and I can't seem to get it working. I've included the jQuery and typeahead files and they are included in the rendered page but I keep getting the error

Uncaught TypeError: undefined is not a function

on the line

$('#the-basics .typeahead').typeahead({

implying that typeahead or jquery is not loaded. None of the files 404 and they are infact loaded. What am I doing wrong?

Here is my code

<script type="text/javascript" src="/static/js/jquery-1.9.1.js"></script>
<script type="text/javascript" src="/static/js/bootstrap.min.js"></script>
<script type="text/javascript" src="/static/js/typeahead.bundle.min.js"></script>


<script type="text/javascript">
    $(document).ready(function() {
        var substringMatcher = function(strs) {
          return function findMatches(q, cb) {
            var matches, substringRegex;

            // an array that will be populated with substring matches
            matches = [];

            // regex used to determine if a string contains the substring `q`
            substrRegex = new RegExp(q, 'i');

            // iterate through the pool of strings and for any string that
            // contains the substring `q`, add it to the `matches` array
            $.each(strs, function(i, str) {
              if (substrRegex.test(str)) {
                // the typeahead jQuery plugin expects suggestions to a
                // JavaScript object, refer to typeahead docs for more info
                matches.push({ value: str });
              }
            });

            cb(matches);
          };
        };

        var states = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California',
          'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii',
          'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana',
          'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota',
          'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire',
          'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota',
          'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island',
          'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont',
          'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming'
        ];

        $('#the-basics .typeahead').typeahead({
          hint: true,
          highlight: true,
          minLength: 1
        },
        {
          name: 'states',
          displayKey: 'value',
          source: substringMatcher(states)
        });
    }); 
</script>

Answer 1

Because there's a typo in the demo. See below.

    <script type="text/javascript" src="/static/js/jquery-1.9.1.js"></script>
    <script type="text/javascript" src="/static/js/bootstrap.min.js"></script>
    <script type="text/javascript" src="/static/js/typeahead.bundle.min.js"></script>


    <script type="text/javascript">
        $(document).ready(function() {
            var substringMatcher = function(strs) {
              return function findMatches(q, cb) {
                var matches, substringRegex;

                // an array that will be populated with substring matches
                matches = [];

                // regex used to determine if a string contains the substring `q`

                /* TYPO !!==> 
                substrRegex = new RegExp(q, 'i');
                 */

               substringRegex == new RegExp(q, 'i');

                // iterate through the pool of strings and for any string that
                // contains the substring `q`, add it to the `matches` array
                $.each(strs, function(i, str) {
                  if (substrRegex.test(str)) {
                    // the typeahead jQuery plugin expects suggestions to a
                    // JavaScript object, refer to typeahead docs for more info
                    matches.push({ value: str });
                  }
                });

                cb(matches);
              };
            };

            var states = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California',
              'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii',
              'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana',
              'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota',
              'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire',
              'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota',
              'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island',
              'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont',
              'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming'
            ];

            $('#the-basics .typeahead').typeahead({
              hint: true,
              highlight: true,
              minLength: 1
            },
            {
              name: 'states',
              displayKey: 'value',
              source: substringMatcher(states)
            });
        }); 
    </script>

Answer 2

update typehead js from this link http://cdnjs.cloudflare.com/ajax/libs/typeahead.js/0.10.2/typeahead.bundle.min.js

Try this code

$(document).ready(function () {

    var substringMatcher = function (strs) {
        return function findMatches(q, cb) {
            var matches, substringRegex;

            // an array that will be populated with substring matches
            matches = [];

            // regex used to determine if a string contains the substring `q`
            substrRegex = new RegExp(q, 'i');

            // iterate through the pool of strings and for any string that
            // contains the substring `q`, add it to the `matches` array
            $.each(strs, function (i, str) {
                if (substrRegex.test(str)) {
                    // the typeahead jQuery plugin expects suggestions to a
                    // JavaScript object, refer to typeahead docs for more info
                    matches.push({
                        value: str
                    });
                }
            });

            cb(matches);
        };
    };

    var states = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California',
        'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii',
        'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana',
        'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota',
        'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire',
        'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota',
        'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island',
        'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont',
        'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming'];

    $('#the-basics .typeahead').typeahead({
        hint: true,
        highlight: true,
        minLength: 1
    }, {
        name: 'states',
        displayKey: 'value',
        source: substringMatcher(states)
    });
});

DEMO

Answer 3

Local variables must be declared with the var keyword or the let keyword.

substrRegex = new RegExp(q, 'i');
//to
var substrRegex = new RegExp(q, 'i');