Javascript-检查是否设置了cookie


Javascript - Check if cookie is set

大家好,如果点击按钮设置了cookie,我想将用户重定向到另一个页面。

<a href="" onClick="SetCookie('pecCookie','dit is een cookie','-1')"><button type="button" name="accept" class="btn btn-success">Button Text</button> 
<script>
    function SetCookie(c_name,value,expiredays)
        {
            var exdate=new Date()
            exdate.setDate(exdate.getDate()+365)
            document.cookie=c_name+ "=" +escape(value)+
            ((expiredays==null) ? "" : ";expires="+exdate.toGMTString()) +
            ("; path=/")
    		location.reload()
        }
        
    if 
        
</script>

Works,我也在php中得到了if语句,但由于wordpress问题,我希望它在javascript中。在php中,它看起来是这样的。

    <?php
$cookie_name = "anyname";
$cookie_value = "anycontent";
If (isset($_COOKIE[$cookie_name])) {
// action if cookie is set  
}
?>

我似乎无法用javascript来理解它,我还四处查看了网络

完成此操作后:

<a href="" onClick="SetCookie('pecCookie','dit is een cookie','-1')"><button type="button" name="accept" class="btn btn-success">Button Text</button> 
<script>
    function SetCookie(c_name,value,expiredays) {
            var exdate=new Date()
            exdate.setDate(exdate.getDate()+365)
            document.cookie=c_name+ "=" +escape(value)+
            ((expiredays==null) ? "" : ";expires="+exdate.toGMTString()) +
            ("; path=/")
    		location.reload()
        }
       
    mycookieValue = getCookie("pecCookie")
    if(mycookieValue) {
        window.location = "193.91.113.21/downloads/";
    }
    
function getCookie(c_name) {
    var re = new RegExp(c_name + "=([^;]+)");
    var value = re.exec(document.cookie);
    return (value != null) ? unescape(value[1]) : null;
}
        
</script>

即使没有cookie ,它也会继续重定向

这里有一个函数,用于获取javascript中的cookie值。

mycookieValue = getCookie("mycookieName")
if(mycookieValue)
{
  //Your code here
}
function getCookie(name)
{
    var re = new RegExp(name + "=([^;]+)");
    var value = re.exec(document.cookie);
    return (value != null) ? unescape(value[1]) : null;
}

我建议您使用jQuery cookie.js库。你可以从这里下载。。https://github.com/carhartl/jquery-cookie

示例:

 //Set Cookie
 $.cookie('userName', 'John');
//Read Cookie Value
var username= $.cookie('userName');
console.log(username);
//Remove a cookie
$.removeCookie('username'); 
//Cookie is removed then above line will return true
//Check cookie in if else
if(username){
  console.log(username);
}
// or you can do this also
if(username=='John'){
  console.log('User Name is '+username);
}

希望这对你有帮助。