讀取數據和隱藏類

Question

我已經有用戶與下列數據的火力地堡數據庫：

名稱：Some Name 電子郵件：some@email.com 層：standard或premium

我想當'tier'的Firebase數據爲standard時，隱藏類".premium-feature"。如果'tier'的數據讀取爲其他任何內容，則需要顯示".premium-feature"。這裏是據我所知︰

du.populateAccountFields = function() { 
    var usr = new Firebase(firebase_url + "https://stackoverflow.com/users/" + user_uid); 
    // Attach an asynchronous callback to read the data at our posts reference 
    usr.on("value", function(snapshot) { 
     user = snapshot.val(); 

     // inject tier data into an input 
     $("#acct_tier").val(user.tier); 
} 

任何幫助嗎？先謝謝你。

Answer 1

你可以試試這個：

du.populateAccountFields = function() { 
    var usr = new Firebase(firebase_url + "https://stackoverflow.com/users/" + user_uid); 
    // Attach an asynchronous callback to read the data at our posts reference 
    usr.on("value", function(snapshot) { 
     user = snapshot.val(); 

     // inject tier data into an input 
     $("#acct_tier").val(user.tier); 
     var $premiumFeature = $('.premium-feature'); 
     if (user.tier === 'standard') { 
      $premiumFeature.hide(); 
     } else { 
      $premiumFeature.show(); 
     } 
}