.magnify{
border-radius: 50%;
border: 2px solid black;
position: absolute;
z-index: 20;
background-repeat: no-repeat;
background-color: white;
box-shadow: inset 0 0 20px rgba(0,0,0,.5);
display: none;
cursor: none;
}
<script>
var $m = jQuery;
$m(document).ready(function() {
var magnifierSize = 250;
var magnification = 4;
function magnifier() {
this.magnifyImg = function(ptr, magnification, magnifierSize) {
var $pointer;
if (typeof ptr == "string") {
$pointer = $m(ptr);
} else if (typeof ptr == "object") {
$pointer = ptr;
}
if(!($pointer.is('img'))){
alert('Object must be image.');
return false;
}
magnification = +(magnification);
$pointer.hover(function() {
$m(this).css('cursor', 'none');
$m('.magnify').show();
var width = $m(this).width();
var height = $m(this).height();
var src = $m(this).attr('src');
var imagePos = $m(this).offset();
var image = $m(this);
if (magnifierSize == undefined) {
magnifierSize = '150px';
}
$m('.magnify').css({
'background-size': width * magnification + 'px ' + height * magnification + "px",
'background-image': 'url("' + src + '")',
'width': magnifierSize,
'height': magnifierSize
});
var magnifyOffset = +($m('.magnify').width() / 2);
var rightSide = +(imagePos.left + $m(this).width());
var bottomSide = +(imagePos.top + $m(this).height());
$m(document).mousemove(function(e) {
if (e.pageX < +(imagePos.left - magnifyOffset / 6) || e.pageX > +(rightSide + magnifyOffset / 6) || e.pageY < +(imagePos.top - magnifyOffset / 6) || e.pageY > +(bottomSide + magnifyOffset / 6)) {
$m('.magnify').hide();
$m(document).unbind('mousemove');
}
var backgroundPos = "" - ((e.pageX - imagePos.left) * magnification - magnifyOffset) + "px " + -((e.pageY - imagePos.top) * magnification - magnifyOffset) + "px";
$m('.magnify').css({
'left': e.pageX - magnifyOffset,
'top': e.pageY - magnifyOffset,
'background-position': backgroundPos
});
});
}, function() {
});
};
this.init = function() {
$m('body').prepend('<div class="magnify"></div>');
}
return this.init();
}
var magnify = new magnifier();
magnify.magnifyImg('img', magnification, magnifierSize);
});
</script>
Si para este tutorial necesitas algún plugin lo podrás encontrar en la pagina de plugins.
