OptionaldecodeSpecifies a function that will be used to decode a cookie-value. Since the value of a cookie has a limited character set (and must be a simple string), this function can be used to decode a previously-encoded cookie value into a JavaScript string.
The default function is the global decodeURIComponent, wrapped in a try..catch. If an error
is thrown it will return the cookie's original value. If you provide your own encode/decode
scheme you must ensure errors are appropriately handled.
Parse options.