Question

I have had some help on a Jquery script which creates a searchable, toggleable FAQ. The code can be seen here:

http://jsfiddle.net/pT6dB/62/

The trouble is, if there is the word “How” with an upper case “H” and I search “h”, it wont find it. How can I make this script case insensitive?

Answer 1

Update

Alternatively, you could reduce the amount of code significantly using regular expression. jsFiddle demo

$('#search').keyup(function(e) {
    // create the regular expression
    var regEx = new RegExp($.map($(this).val().trim().split(' '), function(v) {
            return '(?=.*?' + v + ')';
        }).join(''), 'i');

    // select all list items, hide and filter by the regex then show
    $('#result li').hide().filter(function() {
        return regEx.exec($(this).text());
    }).show();
});​

Original

Based on your current algorithm for determining relative elements, you could use the jQuery filter method to filter your results based on the keywords array. Here’s a rough idea:

// select the keywords as an array of lower case strings
var keywords = $(this).val().trim().toLowerCase().split(' ');

// select all list items, hide and filter then show
$('#result li').hide().filter(function() {
    // get the lower case text for the list element
    var text = $(this).text().toLowerCase();        

    // determine if any keyword matches, return true on first success
    for (var i = 0; i < keywords.length; i++) {
        if (text.indexOf(keywords[i]) >= 0) {
            return true;
        }
    }
}).show();