Example analysis of cookie plug-in usage in jQuery_jquery
本文实例讲述了jQuery中cookie插件用法。分享给大家供大家参考,具体如下:
Jquery里面提供了很多插件,方便,安全,快速实用。这节一起熟悉下JQUERY中操作Cookie的插件,插件名称为jquery.cookie.js,可以去官方网站下载。
下载地址: http://plugins.jquery.com/project/cookie.
插件主要报告如下几个用法
1.创建Cookie
创建一个名称为username,值为 admin的cookie ,如下
当然cookie还包括路径,过期时间等其他参数,一起看下其他参数的用法
expires:表示过期时间,默认为天,如上表示过期时间为7天,如果省略过期时间,表示关闭浏览器时候,cookie将被删除
也可以设置cookie的过期时间,如下设置3分钟后过期
var dt= new date(); dt.settime(date.gettime() + (3* 60 * 1000)); $.cookie('username', 'admin', { expires: dt});
path:定义cookie的有效路径,默认情况下路径为创建cookie网页所在的路径,如果想让整个网站访问到,路径设置为path: '/'
domain:设置cookie所在的域
secure: 如果为true表示cookie的传输需要使用https安全协议,默认为false
2.删除Cookie
可以使用两种方法
$.removeCookie("username"); $.cookie('username',"null");
3.读取cookie
如果没有写入cookie,读取到的值为undefined
附:jquery.cookie.js完整代码如下:
/*! * jQuery Cookie Plugin v1.4.1 * https://github.com/carhartl/jquery-cookie * * Copyright 2006, 2014 Klaus Hartl * Released under the MIT license */ (function (factory) { if (typeof define === 'function' && define.amd) { // AMD (Register as an anonymous module) define(['jquery'], factory); } else if (typeof exports === 'object') { // Node/CommonJS module.exports = factory(require('jquery')); } else { // Browser globals factory(jQuery); } }(function ($) { var pluses = /\+/g; function encode(s) { return config.raw ? s : encodeURIComponent(s); } function decode(s) { return config.raw ? s : decodeURIComponent(s); } function stringifyCookieValue(value) { return encode(config.json ? JSON.stringify(value) : String(value)); } function parseCookieValue(s) { if (s.indexOf('"') === 0) { // This is a quoted cookie as according to RFC2068, unescape... s = s.slice(1, -1).replace(/\\"/g, '"').replace(/\\\\/g, '\\'); } try { // Replace server-side written pluses with spaces. // If we can't decode the cookie, ignore it, it's unusable. // If we can't parse the cookie, ignore it, it's unusable. s = decodeURIComponent(s.replace(pluses, ' ')); return config.json ? JSON.parse(s) : s; } catch(e) {} } function read(s, converter) { var value = config.raw ? s : parseCookieValue(s); return $.isFunction(converter) ? converter(value) : value; } var config = $.cookie = function (key, value, options) { // Write if (arguments.length > 1 && !$.isFunction(value)) { options = $.extend({}, config.defaults, options); if (typeof options.expires === 'number') { var days = options.expires, t = options.expires = new Date(); t.setMilliseconds(t.getMilliseconds() + days * 864e+5); } return (document.cookie = [ encode(key), '=', stringifyCookieValue(value), options.expires ? '; expires=' + options.expires.toUTCString() : '', // use expires attribute, max-age is not supported by IE options.path ? '; path=' + options.path : '', options.domain ? '; domain=' + options.domain : '', options.secure ? '; secure' : '' ].join('')); } // Read var result = key ? undefined : {}, // To prevent the for loop in the first place assign an empty array // in case there are no cookies at all. Also prevents odd result when // calling $.cookie(). cookies = document.cookie ? document.cookie.split('; ') : [], i = 0, l = cookies.length; for (; i < l; i++) { var parts = cookies[i].split('='), name = decode(parts.shift()), cookie = parts.join('='); if (key === name) { // If second argument (value) is a function it's a converter... result = read(cookie, value); break; } // Prevent storing a cookie that we couldn't decode. if (!key && (cookie = read(cookie)) !== undefined) { result[name] = cookie; } } return result; }; config.defaults = {}; $.removeCookie = function (key, options) { // Must not alter options, thus extending a fresh object... $.cookie(key, '', $.extend({}, options, { expires: -1 })); return !$.cookie(key); }; }));
希望本文所述对大家jQuery程序设计有所帮助。

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

What is the Chrome plug-in extension installation directory? Under normal circumstances, the default installation directory of Chrome plug-in extensions is as follows: 1. The default installation directory location of chrome plug-ins in windowsxp: C:\DocumentsandSettings\username\LocalSettings\ApplicationData\Google\Chrome\UserData\Default\Extensions2. chrome in windows7 The default installation directory location of the plug-in: C:\Users\username\AppData\Local\Google\Chrome\User

When users use the Edge browser, they may add some plug-ins to meet more of their needs. But when adding a plug-in, it shows that this plug-in is not supported. How to solve this problem? Today, the editor will share with you three solutions. Come and try it. Method 1: Try using another browser. Method 2: The Flash Player on the browser may be out of date or missing, causing the plug-in to be unsupported. You can download the latest version from the official website. Method 3: Press the "Ctrl+Shift+Delete" keys at the same time. Click "Clear Data" and reopen the browser.

How to remove the height attribute of an element with jQuery? In front-end development, we often encounter the need to manipulate the height attributes of elements. Sometimes, we may need to dynamically change the height of an element, and sometimes we need to remove the height attribute of an element. This article will introduce how to use jQuery to remove the height attribute of an element and provide specific code examples. Before using jQuery to operate the height attribute, we first need to understand the height attribute in CSS. The height attribute is used to set the height of an element

How to use PUT request method in jQuery? In jQuery, the method of sending a PUT request is similar to sending other types of requests, but you need to pay attention to some details and parameter settings. PUT requests are typically used to update resources, such as updating data in a database or updating files on the server. The following is a specific code example using the PUT request method in jQuery. First, make sure you include the jQuery library file, then you can send a PUT request via: $.ajax({u

Title: jQuery Tips: Quickly modify the text of all a tags on the page In web development, we often need to modify and operate elements on the page. When using jQuery, sometimes you need to modify the text content of all a tags in the page at once, which can save time and energy. The following will introduce how to use jQuery to quickly modify the text of all a tags on the page, and give specific code examples. First, we need to introduce the jQuery library file and ensure that the following code is introduced into the page: <

Title: Use jQuery to modify the text content of all a tags. jQuery is a popular JavaScript library that is widely used to handle DOM operations. In web development, we often encounter the need to modify the text content of the link tag (a tag) on the page. This article will explain how to use jQuery to achieve this goal, and provide specific code examples. First, we need to introduce the jQuery library into the page. Add the following code in the HTML file:

How to deal with error messages when WordPress plug-in installation fails? As one of the most popular content management systems currently, WordPress has a rich plug-in library, providing users with various functional extensions and customization options. However, when using WordPress, sometimes plug-in installation fails, and error messages may appear, making users feel confused and anxious. This article will introduce some common WordPress plug-in installation failure error messages and how to deal with these problems. 1. Report

The Firefox browser app software provides a lot of resource information, and the browsing sections in various fields are open. You can search and find the answer immediately. The browsing process is very smooth and has no lag, which is a great experience. Comfortable Internet service. The software search system is very powerful. You can find massive results by just entering keywords. You can also slide up and down to filter and view with one click. All annoying advertising pop-ups are blocked, making the Internet environment more comfortable. At the same time, plug-ins can be added online, so that whether you are watching videos or reading articles, your browsing will not be affected by any network signal. You can find everything you search, and all browsing records are automatically saved. Now the editor will carefully introduce the methods of adding plug-ins to Firefox browser users one by one. 1. Touch the menu button (on some devices
