$scope.watch ('$scope‘)成角

Question

我想检查一下范围中的每一个变化，我尝试了以下几点：

$scope.$watch('$scope', function(newValue) {
    console.log ("$scope's NewValue", newValue);
}, true);

我收到了日志信息：

$scope's NewValue undefined

不管怎么说，这是有可能的吗？

Answer 1

我真的建议你不要这么做。在你的申请中它会有很高的成本。

$scope.$watch(function() { // First function must return the object that you want to watch.
    return $scope;      
},
function(newValue, oldValue) { // This is a callback executed everytime your $scope will change
    console.log("$scope's NewValue : ", newValue);   // You should rather use $log if you want to unit test your code one day
},
true   // Needed to tell angular to watch deeply inside $scope (every sub item).
);