참고 : http://stackoverflow.com/questions/210717/using-jquery-to-center-a-div-on-the-screen
- scroll 계산 없이 처리
(function($){
$.fn.extend({
center: function () {
return this.each(function() {
var top = ($(window).height() - $(this).outerHeight()) / 2;
var left = ($(window).width() - $(this).outerWidth()) / 2;
$(this).css({position:'absolute', margin:0, top: (top > 0 ? top : 0)+'px', left: (left > 0 ? left : 0)+'px'});
});
}
});
})(jQuery);
- scroll 계산 포함
(function($){
$.fn.extend({
center: function (options) {
var options = $.extend({ // Default values
inside:window, // element, center into window
transition: 0, // millisecond, transition time
minX:0, // pixel, minimum left element value
minY:0, // pixel, minimum top element value
withScrolling:true, // booleen, take care of the scrollbar (scrollTop)
vertical:true, // booleen, center vertical
horizontal:true // booleen, center horizontal
}, options);
return this.each(function() {
var props = {position:'absolute'};
if (options.vertical) {
var top = ($(options.inside).height() - $(this).outerHeight()) / 2;
if (options.withScrolling) top += $(options.inside).scrollTop() || 0;
top = (top > options.minY ? top : options.minY);
$.extend(props, {top: top+'px'});
}
if (options.horizontal) {
var left = ($(options.inside).width() - $(this).outerWidth()) / 2;
if (options.withScrolling) left += $(options.inside).scrollLeft() || 0;
left = (left > options.minX ? left : options.minX);
$.extend(props, {left: left+'px'});
}
if (options.transition > 0) $(this).animate(props, options.transition);
else $(this).css(props);
return $(this);
});
}
});
})(jQuery);
$(document).ready(function(){
$('#mainDiv').center();
$(window).bind('resize', function() {
$('#mainDiv').center({transition:300});
});
);
$('your-selector').position({
of: $(window)
});
$.fn.center = function() {
this.css({
'position': 'fixed',
'left': '50%',
'top': '50%'
});
this.css({
'margin-left': -this.outerWidth() / 2 + 'px',
'margin-top': -this.outerHeight() / 2 + 'px'
});
return this;
}
jQuery.fn.center = function ($) {
var w = $(window);
this.css({
'position':'absolute',
'top':Math.abs(((w.height() - this.outerHeight()) / 2) + w.scrollTop()),
'left':Math.abs(((w.width() - this.outerWidth()) / 2) + w.scrollLeft())
});
return this;
}
.center{
position: absolute;
height: 50px;
width: 50px;
background:red;
top:calc(50% - 50px/2); /* 50% - height/2 */
left:calc(50% - 50px/2); /* 50% - width/2 */
}
==========================================================================================================
Bootstrap Modal Center 띄우기
참고 : http://codepen.io/dimbslmh/full/mKfCc