Question

是的，我知道W3school，你们都讨厌它。我有时也会这样做，但它现在正在帮助我。你如何为他们的网站制作删除cookie按钮？他们在网站上的cookie示例：

<!DOCTYPE html>
<html>
<head><script>

function setCookie(cname,cvalue,exdays)
{
var d = new Date();
d.setTime(d.getTime()+(exdays*24*60*60*1000));
var expires = "expires="+d.toGMTString();
document.cookie = cname+"="+cvalue+"; "+expires;
}

function getCookie(cname)
{
var name = cname + "=";
var ca = document.cookie.split(';');
for(var i=0; i<ca.length; i++) 
  {
  var c = ca[i].trim();
  if (c.indexOf(name)==0) return c.substring(name.length,c.length);
  }
return "";
}

function checkCookie()
{
var user=getCookie("username");
if (user!="")
  {
  alert("Welcome again " + user);
  }
else 
  {
  user = prompt("Please enter your name:","");
  if (user!="" && user!=null)
    {
    setCookie("username",user,30);
    }
  }
}

</script></head>

<body onload="checkCookie()"></body>
</html>

我试图使用以下方法删除它：

<input type="button" value ="delte cookie" onclick= '"document.cookie = "username=; expires=Thu, 01 Jan 2000 00:00:00 GMT";'/>

但它不会删除cookie。我尝试过其他方法来删除一个网站的cookie，但它们不起作用。有没有人有一个删除该网站的cookie的按钮的HTML？

Answer 1

试试这个，

 <input type="button" value ="delete cookie" onclick= 'document.cookie = "username=; expires=Thu, 01 Jan 2000 00:00:00 GMT";'/>

Answer 2

很久以前发现它......它就像一个魅力。

function createCookie(name, value, days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        var expires = "; expires=" + date.toGMTString();
    }
    else var expires = "";
    document.cookie = name + "=" + value + expires + "; path=/";
}

function readCookie(name) {
    var nameEQ = name + "=";
    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, c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
    }
    return null;
}

function eraseCookie(name) {
    createCookie(name, "", -1);
}

Answer 3

在删除cookie按钮的onclick事件

上添加此功能

function delete_cookie(name){
document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:01 GMT;';
}

删除W3学校cookie的cookie按钮

3 个答案: