Updating HTML element outside of ng-view

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梦谈多话
梦谈多话 2021-02-13 22:42

I have the below HTML on a page:




    Angula         
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                <span>(楼主)</span>
            
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                <span>2021-02-13 23:31</span>
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<p>Your <code>header</code> div is really a view, just like the other views you've defined for use with ng-view.  Someday, you might want to show more than just a basketCount model in that header view.    But the fact that you are projecting even one piece of model data into that header section  makes that section a view.  So, I would recommend that be given its own $scope to project that model, hence its own controller.</p>

<p>What remains then is where to put the basketCount model?  And we must consider that multiple views may allow the user to do something that need to affect that model.  Angular's normal answer for "many need access" is dependency injection.  So, I would put the basketCount model into a service.  Views/controllers that need access to it can inject it.  Someday your app may have additional views that don't need access to these models, so those views would not inject the service.</p>

<p>Potentially, the entire basket could be modeled in this service:</p>

<pre><code>app.factory('basketService', function() {
   return {
     items: [],
     itemCount: 0,
     ...
   }
});


function HeaderCtrl($scope, basketService) {
   $scope.basket = basketService;
   ...
}

function DetailCtrl($scope, basketService) {
   $scope.basket = basketService;
   ...
}

<div id="header" ng-controller="HeaderCtrl">
   <h1>The JSON Store</h1>
   <div class="cart-info">
        My Cart (<span class="cart-items">{{basket.itemCount}}</span> items)
   </div>
</code></pre>
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