TypeError：CheckRemototepermission不是一个函数。 （在ceckRemotepermission（许可数据）中

Question

我是Safari Web推送通知的新手，我为Safari创建了PushPackage，并且我放置了JavaScript代码以获取用户通知确认，但会遇到问题 IE TypeError：CheckRemotepermission不是一个函数。 （在“ checkRemotepermission（允许达塔）”中，“ CheckRemotepermission”不确定）

我的代码

if ('safari' in window && 'pushNotification' in window.safari) {
    var permissionData = window.safari.pushNotification.permission('web.in.test.website');
    console.log("safari " + permissionData.permission);
    checkRemotePermission(permissionData);
}


var checkRemotePermission =  function(permissionData) {
    if (permissionData.permission === 'default') {
        // This is a new web service URL and its validity is unknown.
        window.safari.pushNotification.requestPermission(
            'https://testsite.com', // The web service URL.
            ''web.in.test.website',     // The Website Push ID.
            {},         // Data used to help you identify the user.
            checkRemotePermission         // The callback function.
        );
    }
    else if (permissionData.permission === 'denied') {
      // The user said no. Talk to your UX expert to see what you can do to entice your
      // users to subscribe to push notifications.
      console.log(permissionData.permission);
    }
    else if (permissionData.permission === 'granted') {
        // The web service URL is a valid push provider, and the user said yes.
        // permissionData.deviceToken is now available to use.
        console.log(permissionData.permission);
        console.log(permissionData.deviceToken);
    } 
}

请提前帮助我