script.js

$(document).ready(function () {
	/* Toggle sidebar when hambugger menu is clicked on mobile view */
	$('.navbar-toggle').click(function () {
		$('.navbar-nav').toggleClass('slide-in');
		$('.side-body').toggleClass('body-slide-in');
		$('#search').removeClass('in').addClass('collapse').slideUp(200);
	});

	/* On-click on the fetch button, perform search */
	$('#fetch').click(function(e){
		e.preventDefault();
		var url = wikipedia_fetch_url();
        $.ajax( {
            type: "GET",
            url: url,
            dataType: 'jsonp',
            success: function(data) {
            	console.log(url);
            	if(data.hasOwnProperty('parse')){
	            	//Hide default title placeholder and show title after search
	                $('#title').hide();
	                document.getElementById('title').innerHTML = data.parse.title;
	                $('#title').show();

	                //Show fetched content after the search
	                $('#content').hide();
	                document.getElementById('content').innerHTML = data.parse.text['*'];
	                $('#content').show();
	            } else {
	            	$('#title').hide();
	                document.getElementById('title').innerHTML = "Error Occured :(";
	                $('#title').show();

	                $('#content').hide();
	                document.getElementById('content').innerHTML = "Article doesn't exist in selected language or error occured!";
	                $('#content').show();
	            }
          	}
        });
	});
});

/* JS function to build the Fetch URL */
function wikipedia_fetch_url() {
	var article_name = $('#article_name').val();
	var language = $('#language').val();
    var base_url = "https://" + language + ".wikipedia.org/w/api.php";
    var data_format = "&format=json";
    var request_url = "?action=parse&prop=text&page=" + article_name;
    var url = base_url + request_url + data_format;
    return url;
}