javascript - How to clear cookies

Question

document.cookie = key=''; expires=${new Date(new Date().getTime() new Date().setTime(-1 * 1000 * 3600 * 24)).toUTCString( )}
I checked and it said to set the expiration time, but I tried but failed

Answer 1

This is a problem for which there is a mature solution.

function deleteAllCookies() {
    var cookies = document.cookie.split(";");

    for (var i = 0; i < cookies.length; i++) {
        var cookie = cookies[i];
        var eqPos = cookie.indexOf("=");
        var name = eqPos > -1 ? cookie.substr(0, eqPos) : cookie;
        document.cookie = name + "=;expires=Thu, 01 Jan 1970 00:00:00 GMT";
    }
}

Answer 2

The answer above is correct. If it cannot be cleared, it may be set to not allow client operations

Answer 3

The server sets a new cookie with an expiration date earlier than now.