jQuery的Cookie操做插件

// jQuery.cookie.js
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;
	}
};
具體用法以下: 一、設置cookie的值,好比咱們要設置變量名爲userid對應值爲123的cookie,代碼以下: $.cookie('userid','123'); 二、新建一個cookie,並設置cookie的有效期 路徑 域名等,代碼以下: $.cookie('userid, '123', {expires: 7, path: '/', domain: 'jquery.com', secure: true}); 注意:若是去掉後面{}的參數,新建後將以默認設置生效。 三、刪除cookie,即把對應cookie值置爲null,代碼以下: $.cookie('userid', null); 四、讀取cookie,如讀取變量名爲userid的cookie值,代碼以下: var uId= $.cookie('userid');
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