这也使用了 jQuery 并创建了一个滑动动画。这将是 HTML:
<div id="wrap">
<h1 id="header">List of countries</h1>
<ul id="list">
<li><a href="#">List Item</a></li>
<li><a href="#">Add Unlimited Items</a></li>
</ul>
</div>
JavaScript
(function ($) {
// custom css expression for a case-insensitive contains()
jQuery.expr[':'].Contains = function(a,i,m){
return (a.textContent || a.innerText || "").toUpperCase().indexOf(m[3].toUpperCase())>=0;
};
function listFilter(header, list) { // header is any element, list is an unordered list
// create and add the filter form to the header
var form = $("<form>").attr({"class":"filterform","action":"#"}),
input = $("<input>").attr({"class":"filterinput","type":"text"});
$(form).append(input).appendTo(header);
$(input)
.change( function () {
var filter = $(this).val();
if(filter) {
// this finds all links in a list that contain the input,
// and hide the ones not containing the input while showing the ones that do
$(list).find("a:not(:Contains(" + filter + "))").parent().slideUp();
$(list).find("a:Contains(" + filter + ")").parent().slideDown();
} else {
$(list).find("li").slideDown();
}
return false;
})
.keyup( function () {
// fire the above change event after every letter
$(this).change();
});
}
//ondomready
$(function () {
listFilter($("#header"), $("#list"));
});
}(jQuery));
CSS 是可选的。JSFiddle 演示:http: //jsfiddle.net/4feug/