How to delete a cookie?
Is my function of creating a cookie correct? How do I delete the cookie at the beginning of my program? is there a simple coding?
function createCookie(name,value,days)
function setCookie(c_name,value,1) {
document.cookie = c_name + "=" +escape(value);
}
setCookie('cookie_name',mac);
function eraseCookie(c_name) {
createCookie(cookie_name,"",-1);
}
Solution 1:
Try this:
function delete_cookie( name, path, domain ) {
if( get_cookie( name ) ) {
document.cookie = name + "=" +
((path) ? ";path="+path:"")+
((domain)?";domain="+domain:"") +
";expires=Thu, 01 Jan 1970 00:00:01 GMT";
}
}
You can define get_cookie()
like this:
function get_cookie(name){
return document.cookie.split(';').some(c => {
return c.trim().startsWith(name + '=');
});
}
Solution 2:
Here a good link on Quirksmode.
function setCookie(name,value,days) {
var expires = "";
if (days) {
var date = new Date();
date.setTime(date.getTime() + (days*24*60*60*1000));
expires = "; expires=" + date.toUTCString();
}
document.cookie = name + "=" + (value || "") + expires + "; path=/";
}
function getCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for(var i=0;i < ca.length;i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1,c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
}
return null;
}
function eraseCookie(name) {
document.cookie = name+'=; Max-Age=-99999999;';
}
Solution 3:
would this work?
function eraseCookie(name) {
document.cookie = name + '=; Max-Age=0'
}
I know Max-Age
causes the cookie to be a session cookie in IE when creating the cookie. Not sure how it works when deleting cookies.
Solution 4:
Some of the other solutions might not work if you created the cookie manually.
Here's a quick way to delete a cookie:
document.cookie = 'COOKIE_NAME=; Max-Age=0; path=/; domain=' + location.host;
If this doesn't work, try replacing location.host
with location.hostname
in the snippet above.
Solution 5:
Here is an implementation of a delete cookie function with unicode support from Mozilla:
function removeItem(sKey, sPath, sDomain) {
document.cookie = encodeURIComponent(sKey) +
"=; expires=Thu, 01 Jan 1970 00:00:00 GMT" +
(sDomain ? "; domain=" + sDomain : "") +
(sPath ? "; path=" + sPath : "");
}
removeItem("cookieName");
If you use AngularJs, try $cookies.remove (underneath it uses a similar approach):
$cookies.remove('cookieName');