JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cdnjs.cloudflare.com/ajax/libs/knockout/2.1.0/knockout-min.js"></script>
<ul class="dropdown-menu">
    <li><a tabindex="-1" href="#" data-bind="click: function () {findByLanguage('C')}">C</a></li>
    <li><a tabindex="-1" href="#" data-bind="click: function () {findByLanguage('Cpp')}">C++</a></li>
</ul>

JavaScript

function BooksViewModel() {
    var self = this;

    self.findByLanguage = function(lang) {
        alert(lang + " was clicked");
    };
}

ko.applyBindings(new BooksViewModel());