[Top-tompak]

там просто есть

<input type="text" name="question" placeholder="Вопрос">

и через keyup, получаю значение var val = question + '[^a]*$';

$(function() {
    $('input[name=question]').keyup(function() {
        console.log('keyup()');
        var question = $('input[name=question]').val();
        console.log('question - ' + question);
        $('.question').each(function(k, v) {
            //console.log('value - ' + $(this).text().toString());
            var val = question + '[^a]*$';
            var re = new RegExp(val, 'i');
            if (re.test($(this).text()) ) {
                console.log('This ok - ' + $(this).text());
            };

        });
    });
});