获取函数外部的变量值

Question

如何在函数“ getClickedName（）”之外获取变量“ clickedName”的值？

var clickedUidName = firebase.database().ref('users/' + clickedRefUid + '/name');
       clickedUidName.on('value', function getClickedName(snapshot){
       var clickedName = snapshot.val();
       });

Answer 1

var clickedUidName = firebase.database().ref('users/' + clickedRefUid + '/name');
clickedUidName.on('value', function getClickedName(snapshot) {
  var clickedName = snapshot.val();
  //call your function here
  myfunction(clickedName);
});

function myfunction(clickedName){
   // do something with clickedName
}