javascript cookie 不会被删除

Question

我写了一个小的 JavaScript 函数

 function getCookie(cname) {
    var name = cname + "=";
    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);
        if (c.indexOf(name) != -1) return c.substring(name.length, c.length);
    }
    return "";
}
function deleteCookie(key)
{
  // Delete a cookie by setting the date of expiry to yesterday
  date = new Date();
  date.setDate(date.getDate() -1);
  document.cookie = escape(key) + '=;expires=' + date;
}

在我的控制台中，我通过 document.cookie = "Next=true"; 设置了一个 cookie 我调用了 getCookie('Next') 。它返回 true 我调用了deleteCookie('Next')，然后调用了getCookie('Next')，仍然返回true。有人能告诉我为什么它不删除cookie吗？

Answer 1

试试这个:

function deleteCookie(key) {
  document.cookie = 
    encodeURIComponent(key) +
    "=deleted; expires=" +
    new Date(0).toUTCString();
}