如何從$範圍。$觀看角度變化鍵（...，真）

Question

我深深的注視着角的對象，

$scope.$watch('bigObject', function(newVal, oldVal, scope) { //Watch the whole object 
    console.log("The key that changed was: " + key); 
}, true); //Deep watch 

我怎樣改變了鑰匙？

輸出示例：The key that changed was: bigObject.users.john.birthday

Answer 1

嘗試爲這樣：

$scope.$watch('bigObject', function (newValue, oldValue, scope) { 
    //Do anything with $scope.letters 
    if(oldValue.users.john.birthday == newValue.users.john.birthday){ 
     //nothing chages 
    } 
    else{ 
     // write your logic here after changinging value  
     } 
      console.log(newValue.users.john.birthday); 
    });