Question

我想检查范围内的每一项变化，并尝试以下内容：

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

我收到日志消息：

$scope's NewValue undefined

那是什么，尝试什么，有可能吗？

Answer 1

我真的建议你不要这样做。它的申请费用很高。

$scope.$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).
);

$ scope.watch（＆＃39; $ scope＆＃39;，...在Angular

1 个答案: