Get the real width and height of an image with JavaScript? (in Safari/Chrome)

Question

I am creating a jQuery plugin.

How do I get the real image width and height with Javascript in Safari?

The following works with Firefox 3, IE7 and Opera 9:

Answer 1

How we get right real dimensions without a blink real image:

(function( $ ){
   $.fn.getDimensions=function(){
         alert("First example:This works only for HTML code without CSS width/height definition.");
         w=$(this, 'img')[0].width;
         h=$(this, 'img')[0].height;

         alert("This is a width/height on your monitor: " + $(this, 'img')[0].width+"/"+$(this, 'img')[0].height);

         //This is bad practice - it shows on your monitor
         $(this, 'img')[0].removeAttribute( "width" );
         $(this, 'img')[0].removeAttribute( "height" );
         alert("This is a bad effect of view after attributes removing, but we get right dimensions: "+  $(this, 'img')[0].width+"/"+$(this, 'img')[0].height);
         //I'am going to repare it
         $(this, 'img')[0].width=w;
         $(this, 'img')[0].height=h;
         //This is a good practice - it doesn't show on your monitor
         ku=$(this, 'img').clone(); //We will work with a clone
         ku.attr( "id","mnbv1lk87jhy0utrd" );//Markup clone for a final removing
         ku[0].removeAttribute( "width" );
         ku[0].removeAttribute( "height" );
         //Now we still get 0
         alert("There are still 0 before a clone appending to document: "+ $(ku)[0].width+"/"+$(ku)[0].height);
         //Hide a clone
         ku.css({"visibility" : "hidden",'position':'absolute','left':'-9999px'}); 
         //A clone appending
         $(document.body).append (ku[0]);
         alert("We get right dimensions: "+ $(ku)[0].width+"/"+$(ku)[0].height);
         //Remove a clone
         $("#mnbv1lk87jhy0utrd").remove();

         //But a next resolution is the best of all. It works in case of CSS definition of dimensions as well.
         alert("But if you want to read real dimensions for image with CSS class definition outside of img element, you can't do it with a clone of image. Clone method is working with CSS dimensions, a clone has dimensions as well as in CSS class. That's why you have to work with a new img element.");
         imgcopy=$('');//new object 
         imgcopy.attr( "id","mnbv1lk87jhy0aaa" );//Markup for a final removing
         imgcopy.css({"visibility" : "hidden",'position':'absolute','left':'-9999px'});//hide copy 
         $(document.body).append (imgcopy);//append to document 
         alert("We get right dimensions: "+ imgcopy.width()+"/"+imgcopy.height());
         $("#mnbv1lk87jhy0aaa").remove();


   }
})( jQuery );

$(document).ready(function(){

   $("img.toreaddimensions").click(function(){$(this).getDimensions();});
});

It works with