Home Web Front-end JS Tutorial jquery operation cookie plug-in sharing_jquery

jquery operation cookie plug-in sharing_jquery

May 16, 2016 pm 05:03 PM

插件的源代码如下:

复制代码 代码如下:

jQuery.cookie = function(name, value, options) {
    if (typeof value != 'undefined') {
        options = options || {};
        if (value === null) {
            value = '';
            options = $.extend({}, options);
            options.expires = -1;
        }
        var expires = '';
        if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {
            var date;
            if (typeof options.expires == 'number') {
                date = new Date();
                date.setTime(date.getTime() (options.expires * 24 * 60 * 60 * 1000));
            } else {
                date = options.expires;
            }
            expires = '; expires=' date.toUTCString();
        }
        var path = options.path ? '; path=' (options.path) : '';
        var domain = options.domain ? '; domain=' (options.domain) : '';
        var secure = options.secure ? '; secure' : '';
        document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');
    } else {
        var cookieValue = null;
        if (document.cookie && document.cookie != '') {
            var cookies = document.cookie.split(';');
            for (var i = 0; i < cookies.length; i ) {
                var cookie = jQuery.trim(cookies[i]);
                if (cookie.substring(0, name.length 1) == (name '=')) {
                    cookieValue = decodeURIComponent(cookie.substring(name.length 1));
                    break;
                }
            }
        }
        return cookieValue;
    }
};

具体用法如下:
1、设置cookie的值,比如我们要设置变量名为userid对应值为123的cookie,代码如下:
$.cookie('userid','123');
2、新建一个cookie,并设置cookie的有效期 路径 域名等,代码如下:
$.cookie('userid, '123', {expires: 7, path: '/', domain: 'jquery.com', secure: true});
注意:如果去掉后面{}的参数,新建后将以默认设置生效。
3、删除cookie,即把对应cookie值置为null,代码如下:
$.cookie('userid', null);
4、读取cookie,如读取变量名为userid的cookie值,代码如下:
var uId= $.cookie('userid');
怎么样,用jquery来操作cookie是不是很简单,你不用自己写太多的js,也不用为那些兼容性发愁,一切就这么顺利。

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