cookies - 神秘的Cookie过期日期 `1969-12-31T23:59:59.000Z`

Question

我正在将 Cookie 过期时间(使用 Express)设置为当前日期。但在 Chrome 中检查后，日期为 1969-12-31T23:59:59.000Z。

在 Firefox 中，Cookie 的到期日期值为 session。

为什么我的 cookie 被设置为这个日期？我认为这是一个错误，因为 Chrome 仍在发送 cookie，这意味着它实际上没有过期。

Answer 1

Unix time was started at the beginning of 1970, that means that -1 is in 1969. And that is a commonly used value for "unknown" if the expected value is usually positive. And for cookies MaxAge with a negative value means that the cookie is not stored persistently and will be deleted when the Web browser exits.

来源:https://stackoverflow.com/a/51497662/3892213