如何在JavaScript中创建和读取cookie的值?
当前回答
JQuery cookie
或纯Javascript:
function setCookie(c_name,value,exdays)
{
var exdate=new Date();
exdate.setDate(exdate.getDate() + exdays);
var c_value=escape(value) + ((exdays==null) ? "" : ("; expires="+exdate.toUTCString()));
document.cookie=c_name + "=" + c_value;
}
function getCookie(c_name)
{
var i,x,y,ARRcookies=document.cookie.split(";");
for (i=0; i<ARRcookies.length; i++)
{
x=ARRcookies[i].substr(0,ARRcookies[i].indexOf("="));
y=ARRcookies[i].substr(ARRcookies[i].indexOf("=")+1);
x=x.replace(/^\s+|\s+$/g,"");
if (x==c_name)
{
return unescape(y);
}
}
}
其他回答
我用js-cookie取得了成功。
<script src="/path/to/js.cookie.js"></script>
<script>
Cookies.set('foo', 'bar');
Cookies.get('foo');
</script>
readCookie的改进版本:
function readCookie( name )
{
var cookieParts = document.cookie.split( ';' )
, i = 0
, part
, part_data
, value
;
while( part = cookieParts[ i++ ] )
{
part_data = part.split( '=' );
if ( part_data.shift().replace(/\s/, '' ) === name )
{
value = part_data.shift();
break;
}
}
return value;
}
一旦你找到你的cookie值并返回它的值,它就会被打破。在我看来,双劈非常优雅。
if条件上的替换是一个空白修饰,以确保它正确匹配
我用这个物体。值是经过编码的,所以在从服务器端读写时必须考虑到这一点。
cookie = (function() {
/**
* Sets a cookie value. seconds parameter is optional
*/
var set = function(name, value, seconds) {
var expires = seconds ? '; expires=' + new Date(new Date().getTime() + seconds * 1000).toGMTString() : '';
document.cookie = name + '=' + encodeURIComponent(value) + expires + '; path=/';
};
var map = function() {
var map = {};
var kvs = document.cookie.split('; ');
for (var i = 0; i < kvs.length; i++) {
var kv = kvs[i].split('=');
map[kv[0]] = decodeURIComponent(kv[1]);
}
return map;
};
var get = function(name) {
return map()[name];
};
var remove = function(name) {
set(name, '', -1);
};
return {
set: set,
get: get,
remove: remove,
map: map
};
})();
这是一个代码获取,设置和删除Cookie在JavaScript。
function getCookie(name) { name = name + "="; var cookies = document.cookie.split(';'); for(var i = 0; i <cookies.length; i++) { var cookie = cookies[i]; while (cookie.charAt(0)==' ') { cookie = cookie.substring(1); } if (cookie.indexOf(name) == 0) { return cookie.substring(name.length,cookie.length); } } return ""; } function setCookie(name, value, expirydays) { var d = new Date(); d.setTime(d.getTime() + (expirydays*24*60*60*1000)); var expires = "expires="+ d.toUTCString(); document.cookie = name + "=" + value + "; " + expires; } function deleteCookie(name){ setCookie(name,"",-1); }
来源:http://mycodingtricks.com/snippets/javascript/javascript-cookies/
Mozilla创建了一个简单的框架,用于读取和写入cookie,并提供了完整的unicode支持以及如何使用它的示例。
一旦包含在页面中,您可以设置cookie:
docCookies.setItem(name, value);
读饼干:
docCookies.getItem(name);
或者删除cookie:
docCookies.removeItem(name);
例如:
// sets a cookie called 'myCookie' with value 'Chocolate Chip'
docCookies.setItem('myCookie', 'Chocolate Chip');
// reads the value of a cookie called 'myCookie' and assigns to variable
var myCookie = docCookies.getItem('myCookie');
// removes the cookie called 'myCookie'
docCookies.removeItem('myCookie');
查看Mozilla文档中的更多示例和详细信息。饼干页面。
这个简单的js文件的一个版本在github上。