How do we add css + animation in jquery?

问题:

Here is a little snippet of what I'm trying to do:

$('#why-red a').hover(function() {
    $(this).animate({ -webkit-transform: 'scale(1.1)'  }, 'slow');  
    }, function() {
    $(this).animate({ -webkit-transform: 'scale(1)' }, 'slow');
});

This could be done with CSS:

// image
#effect a:hover{
    text-decoration:none;
    -webkit-transform: scale(1.1);
    -moz-transform: scale(1.1);
    z-index: 4;
}

and it works. However, in WebKit, on hover, it gets bigger slowly, unlike in Firefox, or IE where the images grow big instantly.

It would be nicer if we could have something like:

#why-red a{
    -webkit-transition: .15s linear;
}

How can we add transition effects or to scale not just for Webkit, but for IE, Firefox, etc.

Update: I received a great sample on how to do something like this from a good guy in jQuery IRC.

var rmatrix = /matrix\(\s*([\d.]+)\s*,\s*([\d.]+)\s*,\s*([\d.]+)\s*,\s*([\d.]+)\s*,\s*([\d.]+)\s*,\s*([\d.]+)\)/;

jQuery.support.scaleTransformProp = (function() {
    var div = document.createElement('div');
    return div.style.MozTransform === '' ? 'MozTransform' : 
           div.style.WebkitTransform === '' ? 'WebkitTransform' :
           div.style.OTransform === '' ? 'OTransform' :
           div.style.MsTransform === '' ? 'MsTransform' :
           false;
})();

if (jQuery.support.scaleTransformProp) {

    jQuery.cssHooks['scale'] = {
        get: function(elem, computed, extra) {
            var transform = jQuery.curCSS(elem, jQuery.support.scaleTransformProp),
                m = transform.match(rmatrix);
            return m && parseFloat(m[1]) || 1.0;
        },
        set: function(elem, val) {
            var transform = jQuery.curCSS(elem, jQuery.support.scaleTransformProp);
            if (transform.match(rmatrix)) {
                elem.style[jQuery.support.scaleTransformProp]= transform.replace(rmatrix, function(m, $1, $2, $3, $4, $5, $6) {
                    return 'matrix(' + [val, $2, $3, val, $5, $6].join(',') + ')';
                });
            } else {            
            elem.style[jQuery.support.scaleTransformProp]= 'scale(' + val + ')';
            }
        }
    };

    jQuery.fx.step.scale = function(fx) {
        jQuery.cssHooks['scale'].set(fx.elem, fx.now)
    };

}

/*SEMENTARA*/
$('#why-red a').hover(function() {
    $(this).animate({ 
        'scale' : 1.1
        }, 200);    
    }, function() {
    $(this).animate({ 
        'scale': 1
        }, 200);
});

For now, this is a good solution, but do any of you have even better ideas?

回答1:

You can't use jQuery's .animate() in conjunction with CSS transforms, at least without a plugin, since the scale() part is non-numeric and would confuse it.

However, you don't actually need jQuery at all for the effect you're after. You can combine -webkit-transform with -webkit-transition (and -moz and -o equivalents) to animate transforms directly in CSS. For example:

#why-red a {
    -webkit-transition: all .15s linear;
    -moz-transition: all .15s linear;
    -o-transition: all .15s linear;
}

#why-red a:hover {
    -webkit-transform: scale(1.1);
    -moz-transform: scale(1.1);
    -o-transform: scale(1.1);
}

(See: http://www.the-art-of-web.com/css/css-animation/)

If you'd like you may be able to the apply the CSS via jQuery's .css() on hover, but this is not needed. Or if you would like to apply css transitions using jquery:

$('#why-red a').css({
    '-webkit-transform': 'scale(1.1)',
    '-moz-transform': 'scale(1.1)',
    '-o-transform': 'scale(1.1)'
});

回答2:

If you wish .animate() used transitions automatically when available (and fallback to regular animation otherwise), you should check out "Enhancing jQuery’s animate function to automatically use CSS3 transitions".

Github repository of the plugin.

回答3:

see the Demos of Jquery having great source.

http://jqueryui.com/demos/toggleClass/

Color Animation Class Animation Show Hide

Just on the fly..

回答4:

Another option to those mentioned above is Transit JS.

Using transit js you can call...

$('.className').transition({ scale: 1.0, duration: 400 });

Transit JS: http://ricostacruz.com/jquery.transit/

回答5:

i know this question was asked years ago, but i have found a solution for a similar problem, so i have decided to share. i have used @-webkit-keyframes to create 2 animations. one with .mouseover and one with .mouseout. combining with .addClass and .removeClass I have managed to make this work.

see example in jsFiddle

or this snippet code:

$('#why-red a').mouseover(function() {
$(this).addClass("scaleAnimation")
.removeClass("downScaleAnimation")
.css("-webkit-transform","scale(1.1)");
})
$('#why-red a').mouseout(function() {
$(this).removeClass("scaleAnimation").
addClass("downScaleAnimation")
.css("-webkit-transform","scale(1)");
})

@-webkit-keyframes scaleAnim {
    0% {-webkit-transform: scale(1);}
    100% {-webkit-transform: scale(1.1);}

}
@-webkit-keyframes downScaleAnim {
    0% {-webkit-transform: scale(1.1);}
    100% {-webkit-transform: scale(1);}

}
.scaleAnimation{
    animation: scaleAnim 1s;
    animation-iteration-count: 1;
}
.downScaleAnimation{
      animation: downScaleAnim 1s;
    animation-iteration-count: 1;
}
#why-red a{position:absolute;}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="why-red">
<a href="#">why-red a</a>
</div>