如何将参数传递给 ng-click 函数? [英] How can I pass a parameter to an ng-click function?
问题描述
我的控制器中有一个如下所示的函数:
AngularJS:
$scope.toggleClass = function(class){$scope.class = !$scope.class;}
我想通过传递我想要切换的类的名称来保持它的通用性:
stuff<div ng-click="toggleClass(myClass)"></div>
但是 myClass
没有被传递给 angular 函数.我怎样才能让它工作?如果我这样写,上面的代码就可以工作:
$scope.toggleClass = function(){$scope.myClass = !$scope.myClass;}
但是,这显然不是一般的.我不想在名为 myClass
的类中进行硬编码.
在函数中
$scope.toggleClass = function(class){$scope.class = !$scope.class;}
$scope.class
与参数 class
没有任何关系.它实际上是 $scope
上的一个属性,称为 class
.如果要访问 $scope
上由变量 class
识别 的属性,则需要使用数组样式的访问器:
$scope.toggleClass = function(class){$scope[class] = !$scope[class];}
请注意,这不是特定于 Angular 的;这就是 JavaScript 的工作原理.以下面的例子:
>var obj = { a: 1, b: 2 }>var a = 'b'>对象1>obj[a]//同说:obj['b']2
<小时>
还有代码
<div ng-click="toggleClass(myClass)"></div>
假设您的作用域中有一个变量,例如$scope.myClass
计算结果为具有您要访问的属性名称的字符串.如果你字面上想传入字符串myClass
,你需要
<div ng-click="toggleClass('myClass')"></div>
这个例子并没有让你很清楚你在寻找哪个(因为在顶部 div
上有一个名为 myClass
的类).
I have a function in my controller that looks like the following:
AngularJS:
$scope.toggleClass = function(class){
$scope.class = !$scope.class;
}
I want to keep it general by passing the name of the class that I want to toggle:
<div class="myClass">stuff</div>
<div ng-click="toggleClass(myClass)"></div>
But myClass
is not being passed to the angular function. How can I get this to work? The above code works if I write it like this:
$scope.toggleClass = function(){
$scope.myClass = !$scope.myClass;
}
But, this is obviously not general. I don't want to hard-code in the class named myClass
.
In the function
$scope.toggleClass = function(class){
$scope.class = !$scope.class;
}
$scope.class
doesn't have anything to do with the paramter class
. It's literally a property on $scope
called class
. If you want to access the property on $scope
that is identified by the variable class
, you'll need to use the array-style accessor:
$scope.toggleClass = function(class){
$scope[class] = !$scope[class];
}
Note that this is not Angular specific; this is just how JavaScript works. Take the following example:
> var obj = { a: 1, b: 2 }
> var a = 'b'
> obj.a
1
> obj[a] // the same as saying: obj['b']
2
Also, the code
<div ng-click="toggleClass(myClass)"></div>
makes the assumption that there is a variable on your scope, e.g. $scope.myClass
that evaluates to a string that has the name of the property you want to access. If you literally want to pass in the string myClass
, you'd need
<div ng-click="toggleClass('myClass')"></div>
The example doesn't make it super clear which you're looking for (since there is a class named myClass
on the top div
).
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