Focus on list item on down arrow press

Question

I am creating a custom auto suggest-box I need to move on li items on arrow down press.

so I added tabindex attribute to li it is getting focus. but problem is that it scrolling the div up with some random height that it out the selected li from div.

after arrow down key:

and after some arrow-down key press:

and after that it goes out of screen while mouse down behave perfectly.

Here I made a Demo JSFiddle first click item1 and then press arrow down it behaving same.

Trice

see if this is what you want jsfiddle.net/mohammadAdil/38zR3/3 – Delrosario

something like this? jsfiddle.net/38zR3/9 – Spriggs

sorry, this supports tabbing as well jsfiddle.net/38zR3/14 – Spriggs

Answer 1

Elaborating on my comment

Set the container's scrollTop to index of focused li * li height.

return false upon keydown to prevent normal browser scrolling of overflown parent.

$('div.container').on('focus', 'li', function() {
    var $this = $(this);
    $this.addClass('active').siblings().removeClass();
    $this.closest('div.container').scrollTop($this.index() * $this.outerHeight());
}).on('keydown', 'li', function(e) {
    var $this = $(this);
    if (e.keyCode === 40) {        
        $this.next().focus();
        return false;
    } else if (e.keyCode === 38) {        
        $this.prev().focus();
        return false;
    }
}).find('li').first().focus();

jsfiddle http://jsfiddle.net/38zR3/42/

Spriggs

Answer 2

Have you tried using anchor instead of tabindex? e.g

<li><a href="#"></li>

In my experience some browsers cannot handle the focus on tabindex correctly

Carolus

Answer 3

I had a problem like that once and solved it by setting the CSS style overflow of the containing div to none or hidden depending on your preference.

Mccurry

thanks... that work correctly but cant change that is requirement to show scroll. – Trice

Answer 4

Add a .scrollTop() to make sure it is either centered or how you want it to be.

Untouchable