如何删除现有的类名并添加一个带有jQuery和cookie的新名称？ [英] How do I remove an existing class name and add a new one with jQuery and cookies?
问题描述
如何删除类名并将其替换为新名称？
How can you remove a class name and replace it with a new one?
<style>
.red {background-color: #FF0000;}
.green{background-color: #00FF00;}
.blue {background-color: #0000FF;}
</style>
<body class="red">
<ul>
<li><a href="">red</a></li>
<li><a href="">green</a></li>
<li><a href="">blue</a></li>
</ul>
</body>
在这种情况下，当您点击红色或绿色或蓝色时，身体类名称将相应更改。它还会创建一个cookie来保存选择。
In this case when you click on red or green or blue, the body class name will change accordingly. Also it will make a cookie which will save the choice.
我尝试了jQuery .addClass并且它正在工作，但是它在现有的类之上添加了一个类。此外，我无法保存cookie。
I tried the jQuery .addClass and it's working, but it's adding a class on top of the existing one. Also I can't manage to save the cookie.
推荐答案
使用：
$('.red').removeClass('red').addClass('blue');
$(function() {
$("a").click(function() {
var color = $(this).text();
$("body").removeClass().addClass(color);
return false;
});
});
现在为cookie部分
And now for the cookie part
$(function() {
$("a").click(function() {
var color = $(this).text();
$("body").removeClass().addClass(color);
createCookie("color",color);
return false;
});
if (readCookie("color") != null) {
$("body").removeClass().addClass(readCookie("color"));
}
else {
$("body").removeClass().addClass("red");
}
});
function createCookie(name,value,days) {
if (days) {
var date = new Date();
date.setTime(date.getTime()+(days*24*60*60*1000));
var expires = "; expires="+date.toGMTString();
}
else
var expires = "";
document.cookie = name+"="+value+expires+"; path=/";
}
function readCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for (var i=0;i < ca.length;i++) {
var c = ca[i];
while (c.charAt(0)==' ')
c = c.substring(1,c.length);
if (c.indexOf(nameEQ) == 0)
return c.substring(nameEQ.length,c.length);
}
return null;
}
function eraseCookie(name) {
createCookie(name,"",-1);
}
这里的工作示例。感谢 QuirksMode 了解预制的cookie代码（cookie-cutter cookie代码） ？）
Working example here. A thank you to QuirksMode for the pre-made cookie code (cookie-cutter cookie code?)
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