仅使用html和CSS就能达到这种效果吗?在示例图像中,您可以看到鼠标悬停的放大的圆形区域(来自高分辨率源图片)。它不是圆形区域或没有边界。
鼠标悬停在HTML / CSS上的图像上所需的放大效果的示例
在此站点示例中,您可以看到一个很好的示例(但是它使用jquery,我不知道将此代码放在我的网页中的什么位置)
有人可以给我一个提示如何开始编写此代码的提示吗?(如果可行)。非常感谢!
要使用第二个示例很简单,只需复制html页面中的html,css页面中的css和html页面中的jquery代码,就像这样
<script type="text/javascript">$(document).ready(function(){
var native_width = 0;
var native_height = 0;
//Now the mousemove function
$(".magnify").mousemove(function(e){
//When the user hovers on the image, the script will first calculate
//the native dimensions if they don't exist. Only after the native dimensions
//are available, the script will show the zoomed version.
if(!native_width && !native_height)
{
//This will create a new image object with the same image as that in .small
//We cannot directly get the dimensions from .small because of the
//width specified to 200px in the html. To get the actual dimensions we have
//created this image object.
var image_object = new Image();
image_object.src = $(".small").attr("src");
//This code is wrapped in the .load function which is important.
//width and height of the object would return 0 if accessed before
//the image gets loaded.
native_width = image_object.width;
native_height = image_object.height;
}
else
{
//x/y coordinates of the mouse
//This is the position of .magnify with respect to the document.
var magnify_offset = $(this).offset();
//We will deduct the positions of .magnify from the mouse positions with
//respect to the document to get the mouse positions with respect to the
//container(.magnify)
var mx = e.pageX - magnify_offset.left;
var my = e.pageY - magnify_offset.top;
//Finally the code to fade out the glass if the mouse is outside the container
if(mx < $(this).width() && my < $(this).height() && mx > 0 && my > 0)
{
$(".large").fadeIn(100);
}
else
{
$(".large").fadeOut(100);
}
if($(".large").is(":visible"))
{
//The background position of .large will be changed according to the position
//of the mouse over the .small image. So we will get the ratio of the pixel
//under the mouse pointer with respect to the image and use that to position the
//large image inside the magnifying glass
var rx = Math.round(mx/$(".small").width()*native_width - $(".large").width()/2)*-1;
var ry = Math.round(my/$(".small").height()*native_height - $(".large").height()/2)*-1;
var bgp = rx + "px " + ry + "px";
//Time to move the magnifying glass with the mouse
var px = mx - $(".large").width()/2;
var py = my - $(".large").height()/2;
//Now the glass moves with the mouse
//The logic is to deduct half of the glass's width and height from the
//mouse coordinates to place it with its center at the mouse coordinates
//If you hover on the image now, you should see the magnifying glass in action
$(".large").css({left: px, top: py, backgroundPosition: bgp});
}
}
})
}
在您的html页面之间和之间使用此代码
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
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