获取页面隐藏元素的高宽

jquery中无法获取display:none的元素的高度和宽度，这时，只需要使用jquery.actual.js即可。

具体方法如下：

引入jquery.actual.js

<script src="jquery.js" type="text/javascript" ></script><script src="jquery.actual.min.js" type="text/javascript"></script>

代码规范：

//get hidden element actual width$('.hidden').actual('width');//get hidden element actual innerWidth$('.hidden').actual('innerWidth');//get hidden element actual outerWidth$('.hidden').actual('outerWidth');//get hidden element actual outerWidth and set the `includeMargin` argument$('.hidden').actual('outerWidth',{includeMargin:true});//get hidden element actual height$('.hidden').actual('height');//get hidden element actual innerHeight$('.hidden').actual('innerHeight');//get hidden element actual outerHeight$('.hidden').actual('outerHeight');// get hidden element actual outerHeight and set the `includeMargin` argument$('.hidden').actual('outerHeight',{includeMargin:true});//if the page jumps or blinks, pass a attribute '{ absolute : true }'//be very careful, you might get a wrong result depends on how you makrup your html and css$('.hidden').actual('height',{absolute:true});// if you use css3pie with a float element// for example a rounded corner navigation menu you can also try to pass a attribute '{ clone : true }'// please see demo/css3pie in action$('.hidden').actual('width',{clone:true});

jquery.actual.js源码：

;( function ( $ ){ $.fn.addBack = $.fn.addBack || $.fn.andSelf; $.fn.extend({   actual : function ( method, options ){     // check if the jQuery method exist     if( !this[ method ]){       throw '$.actual => The jQuery method "' + method + '" you called does not exist';     }     var defaults = {       absolute      : false,       clone         : false,       includeMargin : false     };     var configs = $.extend( defaults, options );     var $target = this.eq( 0 );     var fix, restore;     if( configs.clone === true ){       fix = function (){         var style = 'position: absolute !important; top: -1000 !important; ';         // this is useful with css3pie         $target = $target.           clone().           attr( 'style', style ).           appendTo( 'body' );       };       restore = function (){         // remove DOM element after getting the width         $target.remove();       };     }else{       var tmp   = [];       var style = '';       var $hidden;       fix = function (){         // get all hidden parents         $hidden = $target.parents().addBack().filter( ':hidden' );         style   += 'visibility: hidden !important; display: block !important; ';         if( configs.absolute === true ) style += 'position: absolute !important; ';         // save the origin style props         // set the hidden el css to be got the actual value later         $hidden.each( function (){           var $this = $( this );           // Save original style. If no style was set, attr() returns undefined           tmp.push( $this.attr( 'style' ));           $this.attr( 'style', style );         });       };       restore = function (){         // restore origin style values         $hidden.each( function ( i ){           var $this = $( this );           var _tmp  = tmp[ i ];           if( _tmp === undefined ){             $this.removeAttr( 'style' );           }else{             $this.attr( 'style', _tmp );           }         });       };     }     fix();     // get the actual value with user specific methed     // it can be 'width', 'height', 'outerWidth', 'innerWidth'... etc     // configs.includeMargin only works for 'outerWidth' and 'outerHeight'     var actual = /(outer)/.test( method ) ?       $target[ method ]( configs.includeMargin ) :       $target[ method ]();     restore();     // IMPORTANT, this plugin only return the value of the first element     return actual;   } });})( jQuery );

jquery.actual.min.js源码：

/*! Copyright 2012, Ben Lin (http://dreamerslab.com/) * Licensed under the MIT License (LICENSE.txt). * * Version: 1.0.18 * * Requires: jQuery >= 1.2.3 */(function(a){if(typeof define==="function"&&define.amd){define(["jquery"],a);}else{a(jQuery);}}(function(a){a.fn.addBack=a.fn.addBack||a.fn.andSelf;a.fn.extend({actual:function(b,l){if(!this[b]){throw'$.actual => The jQuery method "'+b+'" you called does not exist';}var f={absolute:false,clone:false,includeMargin:false,display:"block"};var i=a.extend(f,l);var e=this.eq(0);var h,j;if(i.clone===true){h=function(){var m="position: absolute !important; top: -1000 !important; ";e=e.clone().attr("style",m).appendTo("body");};j=function(){e.remove();};}else{var g=[];var d="";var c;h=function(){c=e.parents().addBack().filter(":hidden");d+="visibility: hidden !important; display: "+i.display+" !important; ";if(i.absolute===true){d+="position: absolute !important; ";}c.each(function(){var m=a(this);var n=m.attr("style");g.push(n);m.attr("style",n?n+";"+d:d);});};j=function(){c.each(function(m){var o=a(this);var n=g[m];if(n===undefined){o.removeAttr("style");}else{o.attr("style",n);}});};}h();var k=/(outer)/.test(b)?e[b](i.includeMargin):e[b]();j();return k;}});}));

原文引用自：http://blog.sina.com.cn/s/blog_8a9505840101fzsk.html