Cookie processing

JavaScript
1

Is there some classes in JS to work with cookie? Something like…

let foo = Cookie.get('foo');
2

Hi @igor_g, the DOM only has document.cookie to work with, but you might have a look at the js-cookie library for a more convenient way.

3 Likes
3

And if you are wanting a simpler way, there are some fundamental cookie-handling functions at https://snipplr.com/view/45954/cookie-handling-functions

4

Hi @Paul_Wilkins. There is no problem to write self-made parser for cookie. But I’ve hoped on standard JS feature.

5

JavaScript has no built-in features for handling cookies.

The above code that I posted is the closest to “official” cookie-handling code that you’ll come across, because it’s a cleaned-up version of code that comes from Quirksmode, who investigated all of the corner cases that existed in JavaScript.

https://www.quirksmode.org/js/cookies.html

6

I would clean the code up even further these days, using JSLint to tidy it up to the following code instead:

function createCookie(name, value, days) {
    var expires = "";
    var date = new Date();
    if (days) {
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        expires = "; expires=" + date.toGMTString();
    }
    document.cookie = name + "=" + value + expires + "; path=/";
}
function readCookie(name) {
    var nameEQ = name + "=";
    var allCookies = document.cookie.split(";");
    allCookies.forEach(function (cookie) {
        while (cookie.charAt(0) === " ") {
            cookie = cookie.substring(1, cookie.length);
        }
        if (cookie.indexOf(nameEQ) === 0) {
            return cookie.substring(nameEQ.length, cookie.length);
        }
    });
}
function eraseCookie(name) {
    createCookie(name, "", -1);
}
7

Actually, as I know, cookie attribute expires yet deprecated due max-age. Is that correct for all current browsers?

8

I wasn’t aware that any part of it has been or will be deprecated. Can you please give further details about that?

According to caniuse.com, both are still supported, though max-age has less support than expires.

9

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