Web Front-end
JS Tutorial
JavaScript code library for writing cookies cookieLibrary.js_javascript tips
JavaScript code library for writing cookies cookieLibrary.js_javascript tips
/* Cookie Library -- "Night of the Living Cookie" Version (25-Jul-96)
2缔友计算机信息技术有限公司，涂聚文 geovindu@163.com 互相交流
3 Written by: Bill Dortch, hIdaho Design
4 The following functions are released to the public domain.
5http://www.dusystem.com/
6 This version takes a more aggressive approach to deleting
7 cookies. Previous versions set the expiration date to one
8 millisecond prior to the current time; however, this method
9 did not work in Netscape 2.02 (though it does in earlier and
later versions), resulting in "zombie" cookies that would not
die. DeleteCookie now sets the expiration date to the earliest
usable date (one second into 1970), and sets the cookie's value
to null for good measure.
Also, this version adds optional path and domain parameters to
the DeleteCookie function. If you specify a path and/or domain
when creating (setting) a cookie**, you must specify the same
path/domain when deleting it, or deletion will not occur.
The FixCookieDate function must now be called explicitly to
correct for the 2.x Mac date bug. This function should be
called *once* after a Date object is created and before it
is passed (as an expiration date) to SetCookie. Because the
Mac date bug affects all dates, not just those passed to
SetCookie, you might want to make it a habit to call
FixCookieDate any time you create a new Date object:
var theDate = new Date();
FixCookieDate (theDate);
Calling FixCookieDate has no effect on platforms other than
the Mac, so there is no need to determine the user's platform
prior to calling it.
This version also incorporates several minor coding improvements.
**Note that it is possible to set multiple cookies with the same
name but different (nested) paths. For example:
SetCookie ("color","red",null,"/outer");
SetCookie ("color","blue",null,"/outer/inner");
However, GetCookie cannot distinguish between these and will return
the first cookie that matches a given name. It is therefore
recommended that you *not* use the same name for cookies with
different paths. (Bear in mind that there is *always* a path
associated with a cookie; if you don't explicitly specify one,
the path of the setting document is used.)
Revision History:
"Toss Your Cookies" Version (22-Mar-96)
- Added FixCookieDate() function to correct for Mac date bug
"Second Helping" Version (21-Jan-96)
- Added path, domain and secure parameters to SetCookie
- Replaced home-rolled encode/decode functions with Netscape's
new (then) escape and unescape functions
"Free Cookies" Version (December 95)
For information on the significance of cookie parameters, and
and on cookies in general, please refer to the official cookie
spec, at:
http:www.netscape.com/newsref/std/cookie_spec.html
****************************************************************** */
/**//* "Internal" function to return the decoded value of a cookie*/
function getCookieVal (offset) {
var endstr = document.cookie.indexOf (";", offset);
if (endstr == -1) {
endstr = document.cookie.length;
}
return unescape(document.cookie.substring(offset, endstr));
}
/**//* Function to correct for 2.x Mac date bug. Call this function to
fix a date object prior to passing it to SetCookie.
IMPORTANT: This function should only be called *once* for
any given date object! See example at the end of this document.*/
function FixCookieDate (date) {
var base = new Date(0);
var skew = base.getTime(); // dawn of (Unix) time - should be 0
if (skew > 0) { // except on the Mac - ahead of its time
date.setTime(date.getTime() - skew);
}
}
/**//* Function to return the value of the cookie specified by "name".
name - String object containing the cookie name.
returns - String object containing the cookie value, or null if
the cookie does not exist.*/
function GetCookie (name) {
var temp = name "=";
var tempLen = temp.length;
var cookieLen = document.cookie.length;
var i = 0;
while (i < cookieLen) {
var j = i tempLen;
if (document.cookie.substring(i, j) == temp) {
return getCookieVal(j);
}
i = document.cookie.indexOf(" ", i) 1;
if (i == 0) break;
}
return null;
}
/**//* Function to create or update a cookie.
name - String object containing the cookie name.
value - String object containing the cookie value. May contain
any valid string characters.
[expiresDate] - Date object containing the expiration data of the cookie. If
omitted or null, expires the cookie at the end of the current session.
[path] - String object indicating the path for which the cookie is valid.
If omitted or null, uses the path of the calling document.
[domain] - String object indicating the domain for which the cookie is
valid. If omitted or null, uses the domain of the calling document.
[secure] - Boolean (true/false) value indicating whether cookie transmission
requires a secure channel (HTTPS).
The first two parameters are required. The others, if supplied, must
be passed in the order listed above. To omit an unused optional field,
use null as a place holder. For example, to call SetCookie using name,
value and path, you would code:
SetCookie ("myCookieName", "myCookieValue", null, "/");
Note that trailing omitted parameters do not require a placeholder.
To set a secure cookie for path "/myPath", that expires after the
current session, you might code:
SetCookie (myCookieVar, cookieValueVar, null, "/myPath", null, true);*/
function SetCookie (name,value,expiresDate,path,domain,secure) {
document.cookie = name "=" escape (value)
((expiresDate) ? "; expires=" expiresDate.toGMTString() : "")
((path) ? "; path=" path : "")
((domain) ? "; domain=" domain : "")
((secure) ? "; secure" : "");
}
/**//* Function to delete a cookie. (Sets expiration date to start of epoch)
name - String object containing the cookie name
path - String object containing the path of the cookie to delete. This MUST
be the same as the path used to create the cookie, or null/omitted if
no path was specified when creating the cookie.
domain - String object containing the domain of the cookie to delete. This MUST
be the same as the domain used to create the cookie, or null/omitted if
no domain was specified when creating the cookie.*/
function DeleteCookie (name,path,domain) {
if (GetCookie(name)) {
document.cookie = name "="
((path) ? "; path=" path : "")
((domain) ? "; domain=" domain : "")
"; expires=Thu, 01-Jan-70 00:00:01 GMT";
}
}
// Calling examples:
// var expdate = new Date ();
// FixCookieDate (expdate); // Correct for Mac date bug - call only once for given Date object!
// expdate.setTime (expdate.getTime() (24 * 60 * 60 * 1000)); // 24 hrs from now
// SetCookie ("ccpath", "http://www.dupcit.com/articles/", expdate);
// SetCookie ("ccname", "WebWoman", expdate);
// SetCookie ("tempvar", "This is a temporary cookie.");
// SetCookie ("ubiquitous", "This cookie will work anywhere in this domain",null,"/");
// SetCookie ("paranoid", "This cookie requires secure communications",expdate,"/",null,true);
// SetCookie ("goner", "This cookie must die!");
// document.write (document.cookie "
");
// DeleteCookie ("goner");
// document.write (document.cookie "
");
// document.write ("ccpath = " GetCookie("ccpath") "
");
// document.write ("ccname = " GetCookie("ccname") "
");
// document.write ("tempvar = " GetCookie("tempvar") "
");
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
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
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
Where are cookies stored?
Dec 20, 2023 pm 03:07 PM
Cookies are usually stored in the cookie folder of the browser. Cookie files in the browser are usually stored in binary or SQLite format. If you open the cookie file directly, you may see some garbled or unreadable content, so it is best to use Use the cookie management interface provided by your browser to view and manage cookies.
Where are the cookies on your computer?
Dec 22, 2023 pm 03:46 PM
Cookies on your computer are stored in specific locations on your browser, depending on the browser and operating system used: 1. Google Chrome, stored in C:\Users\YourUsername\AppData\Local\Google\Chrome\User Data\Default \Cookies etc.
Where are the mobile cookies?
Dec 22, 2023 pm 03:40 PM
Cookies on the mobile phone are stored in the browser application of the mobile device: 1. On iOS devices, Cookies are stored in Settings -> Safari -> Advanced -> Website Data of the Safari browser; 2. On Android devices, Cookies Stored in Settings -> Site settings -> Cookies of Chrome browser, etc.
How cookies work
Sep 20, 2023 pm 05:57 PM
The working principle of cookies involves the server sending cookies, the browser storing cookies, and the browser processing and storing cookies. Detailed introduction: 1. The server sends a cookie, and the server sends an HTTP response header containing the cookie to the browser. This cookie contains some information, such as the user's identity authentication, preferences, or shopping cart contents. After the browser receives this cookie, it will be stored on the user's computer; 2. The browser stores cookies, etc.
Does clearing cookies have any impact?
Sep 20, 2023 pm 06:01 PM
The effects of clearing cookies include resetting personalization settings and preferences, affecting ad experience, and destroying login status and password remembering functions. Detailed introduction: 1. Reset personalized settings and preferences. If cookies are cleared, the shopping cart will be reset to empty and products need to be re-added. Clearing cookies will also cause the login status on social media platforms to be lost, requiring re-adding. Enter your username and password; 2. It affects the advertising experience. If cookies are cleared, the website will not be able to understand our interests and preferences, and will display irrelevant ads, etc.
Detailed explanation of where browser cookies are stored
Jan 19, 2024 am 09:15 AM
With the popularity of the Internet, we use browsers to surf the Internet have become a way of life. In the daily use of browsers, we often encounter situations where we need to enter account passwords, such as online shopping, social networking, emails, etc. This information needs to be recorded by the browser so that it does not need to be entered again the next time you visit. This is when cookies come in handy. What are cookies? Cookie refers to a small data file sent by the server to the user's browser and stored locally. It contains user behavior of some websites.
What are the dangers of cookie leakage?
Sep 20, 2023 pm 05:53 PM
The dangers of cookie leakage include theft of personal identity information, tracking of personal online behavior, and account theft. Detailed introduction: 1. Personal identity information is stolen, such as name, email address, phone number, etc. This information may be used by criminals to carry out identity theft, fraud and other illegal activities; 2. Personal online behavior is tracked and analyzed through cookies With the data in the account, criminals can learn about the user's browsing history, shopping preferences, hobbies, etc.; 3. The account is stolen, bypassing login verification, directly accessing the user's account, etc.
Frequently Asked Questions and Solutions about Cookie Settings
Jan 19, 2024 am 09:08 AM
Common problems and solutions for cookie settings, specific code examples are required. With the development of the Internet, cookies, as one of the most common conventional technologies, have been widely used in websites and applications. Cookie, simply put, is a data file stored on the user's computer that can be used to store the user's information on the website, including login name, shopping cart contents, website preferences, etc. Cookies are an essential tool for developers, but at the same time, cookie settings are often encountered
