JsLib For Unity

//Assets/Plugins/javaScript.jslib
mergeInto(LibraryManager.library, {

  GetCookie: function (cname) {
    var ret="";
    var name = Pointer_stringify(cname) + "=";
    var decodedCookie = decodeURIComponent(document.cookie);
    console.log('get cookie='+decodedCookie);
    var ca = decodedCookie.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) == 0) {
            ret=c.substring(name.length, c.length);
            break;
        }
    }
    var bufferSize = lengthBytesUTF8(ret) + 1;
    var buffer = _malloc(bufferSize);
    stringToUTF8(ret, buffer, bufferSize);
    return buffer;
  },
  RedirectTo: function (url) {
    var name = Pointer_stringify(url);
    window.location.href = url;
  },
});

//Import
[DllImport("__Internal")]
    private static extern string GetCookie(string name);
[DllImport("__Internal")]
    private static extern void RedirectTo(string url);

//Use
string cookie = GetCookie("identifierUser");
RedirectTo("/ExampleLink.php");