Clear all cookie using Javascript

Question

Is there anyway to clear the cookie using javascript?

First, I need to clearify the problem. Many posts in StackOverflow give this kind of answer. But it is clearing cookie like setting the value of all the keys to empty string. But I need to erase the keys as well. How can I do that？

PS： I tried document.cookie = null, but it does not work here

Doesn't setting the "expire" value for the cookie to a date in the distant past work for you? — verisimilitude, May 22 '12 at 04:53
You should [read more about cookies](https://developer.mozilla.org/en/DOM/document.cookie) — Joseph, May 22 '12 at 04:59

score 0 · Answer 1 · answered May 22 '12 at 04:57

The best way I found is to expire the cookie you want to delete, use this javascript:

function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(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) {
    createCookie(name,"",-1);
}

Clear all cookie using Javascript

1 Answers1