Keyboard navigation on single post between the Next / Previous posts in WordPress

wp-next-prev-keyboard-navigation.js

/* Keyboard navigation throu Next/Prev posts

   Make sure your previous and next post links have the classes prev and next
   
   Example: <a href="#" class="next">Next Post</a>
            <a href="#" class="prev">Previous Post</a>
*/

$(document).ready(function(){
 
    // This "clicks" the link
    $(function(){
        $('.prev').click(function(){
            location.href = $(this).attr('href');
        });
        $('.next').click(function() {
            location.href = $(this).attr('href');
        });
    });
 
    // This registers the keystroke
    $(document).keydown(function(event) {
        // Left arrow = previous link
        if(event.keyCode==37) {
            $('.prev').trigger('click');
        }
        // Right arrow = next link
        if(event.keyCode==39) {
            $('.next').trigger('click');
        }
    });
 
    // This prevents it from firing when typing in search box or comments
    $('input, textarea').keydown(function(event){
        event.stopPropagation();
    });
});