欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

jquery div 居中技巧应用介绍

程序员文章站 2022-11-03 17:49:21
very short version: [html] 代码如下: $('#mydiv').css({top:'50%',left:'...

very short version:
[html]

代码如下:


$('#mydiv').css({top:'50%',left:'50%',margin:'-'+($('#mydiv').height() / 2)+'px 0 0 -'+($('#mydiv').width() / 2)+'px'});
$('#mydiv').css({top:'50%',left:'50%',margin:'-'+($('#mydiv').height() / 2)+'px 0 0 -'+($('#mydiv').width() / 2)+'px'});


short version:
[html]

代码如下:


(function($){
$.fn.extend({
center: function () {
return this.each(function() {
var top = ($(window).height() - $(this).outerheight()) / 2;
var left = ($(window).width() - $(this).outerwidth()) / 2;
$(this).css({position:'absolute', margin:0, top: (top > 0 ? top : 0)+'px', left: (left > 0 ? left : 0)+'px'});
});
}
});
})(jquery);
(function($){
$.fn.extend({
center: function () {
return this.each(function() {
var top = ($(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);


activated by this code :

. 代码如下:


$('#maindiv').center();


[javascript]

. 代码如下:


(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 $(this);
});
}
});
})(jquery);
[code]
(function($){
$.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);


plugin version
[javascript]

. 代码如下:


(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);


. 代码如下:


(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);


activated by this code :

. 代码如下:


$(document).ready(function(){
$('#maindiv').center();
$(window).bind('resize', function() {
$('#maindiv').center({transition:300});
});
);