Tab control usability hover triggers in jQuery

Sam Deering

Tab control usability hover triggers in jQuery. Tested and works in Chrome, FF, IE9, IE8.

Load is jsfiddle for TAB demo to work.
jsfiddle

The tabindex Property

  • The tabindex attribute is supported in all major browsers, except Safari.
  • HTML5 – tabindex attribute can be used on any HTML element
  • HTML 4.01 – tabindex attribute can be used with: ,
    ,
    .

jQuery

$(document).ready(function () {

    /* "trigger" hover by adding a CSS class */
    $('.transition-container').on('mouseover', function (e) {
        $(this).find('.transition').addClass('activeHover');
        $(this).on('mouseout', function (e) {
            $(this).find('.transition').removeClass('activeHover');
        });
    });

    /* get key code */
    function getKeyCode(key) {
        //return the key code
        return (key == null) ? event.keyCode : key.keyCode;
    }

    /* for usabiity capture keyboard tabbing */
    $(document).on('keyup', function (eventObj) {
        //tab keycode = 9
        if (getKeyCode(eventObj) == '9') {
            var $el = $(document.activeElement);
            //remove any current active elements
            $('.transition').removeClass('activeHover');
            if ($el.hasClass('transition-container')) {
                $el.find('.transition').addClass('activeHover');
            }
        }
    });

});

/* Internet Explorer sniffer code to add class to body tag for IE version */
var ie = (function () {

    var undef,
    v = 3,
        div = document.createElement('div'),
        all = div.getElementsByTagName('i');

    while (
    div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i>< ![endif]-->',
    all[0]);

    if (v > 4) {
        $('body').addClass('ie' + v);
    }

}());

CSS

/* transition speed */
 .transition {
    -webkit-transition: -webkit-transform .2s ease-out;
    -moz-transition: -moz-transform .2s ease-out;
    -o-transition: -o-transform .2s ease-out;
    -ms-transition: -ms-transform .2s ease-out;
    transition: transform .2s ease-out;
}
/* IE 9 scale */
 .ie9 .activeHover {
    -ms-transform: scale(1.2, 1.2);
}
/* IE 8 scale */
 .ie8 .activeHover {
    filter: progid:DXImageTransform.Microsoft.Matrix(M11=1.1, M12=0, M21=0, M22=1.1, SizingMethod='auto expand');
}
/* modern browsers transition */
 .activeHover {
    -webkit-transform:scale(1.2);
    -moz-transform:scale(1.2);
    -o-transform:scale(1.2);
    transform:scale(1.2);
}
/* IE 7 scale */
 .ie7 .activeHover {
    filter: none;
    transform: none;
}
.transition-container {
    border: 1px solid blue;
    margin: 15px;
    padding:5px;
}
*:active {
    border: 1px solid red;
}
}

HTML5

<!-- tab control usability hover triggers -->
<p>Click to get focus and start pressing TAB to switch between items. Press SHIFT+TAB to go back up.</p>
<div class="transition-container"
tabindex="1">
    <img src="http://jquery4u.com/images/mono-icons/round.png"
    class="transition" />
</div>
<div class="transition-container" tabindex="2">
    <img src="http://jquery4u.com/images/mono-icons/left.png"
    class="transition" />
</div>
<div class="transition-container" tabindex="3">
    <img src="http://jquery4u.com/images/mono-icons/home.png"
    class="transition" />
</div>
<div class="transition-container" tabindex="4">
    <img src="http://jquery4u.com/images/mono-icons/heart.png"
    class="transition" />
</div>
<div class="transition-container" tabindex="5">
    <img src="http://jquery4u.com/images/mono-icons/user.png"
    class="transition" />
</div>
<div class="transition-container" tabindex="6">
    <img src="http://jquery4u.com/images/mono-icons/tick.png"
    class="transition" />
</div>
<div class="transition-container" tabindex="7">
    <img src="http://jquery4u.com/images/mono-icons/up.png"
    class="transition" />
</div>

Free book: Jump Start HTML5 Basics

Grab a free copy of one our latest ebooks! Packed with hints and tips on HTML5's most powerful new features.