Understanding ng-if in AngularJSAngularJS includes a useful directive called ng

After using angularJS, I found myself wondering how to effectively implement its if statement in a particular way. I hope that my example will help clarify my question.

Here is the if statement I am working with:

<div data-ng-if="book.Availability>0">
  <div class="col-xs-12 col-md-12 nopadding" style="border-right:solid 6px blue">
     //some html div's here with angularJS
  </div>
</div>

<div data-ng-if="book.Availability==0">
  <div class="col-xs-12 col-md-12 nopadding" style="border-right:solid 6px red">
     //some html div's here with angularJS
  </div>
</div>

In this code, the content within 

//some html div's here with angularJS
is the same for both if statements, with the only difference being the color of the container (red and blue).

I believe this code is redundant. Is there a way to use the same content for both if statements?

I attempted the following approach:

<div data-ng-if="book.Availability>0">
      <div class="col-xs-12 col-md-12 nopadding" style="border-right:solid 6px blue">
  </div>
  <div data-ng-if="book.Availability==0">
      <div class="col-xs-12 col-md-12 nopadding" style="border-right:solid 6px red">
  </div>
    `//some html div's here with angularJS`

However, this did not produce the desired output.

Thank you for any assistance with this issue.

I realize that my question may not fully capture what I am trying to achieve, but I am struggling to articulate it clearly.

javascriptjqueryhtmlcssangularjs

Answer №1

Instead of using ng-if to solve the issue, consider applying a class to the div container based on your condition. This will prevent unnecessary duplication of DOM elements for a simple styling problem.

http://plnkr.co/edit/mU0P7Bp1mFidWWfIUyX2?p=preview 

<head>
<script data-require="angular.js@*" data-semver="1.3.0-beta.5" src="https://code.angularjs.org/1.3.0-beta.5/angular.js"></script>
<link rel="stylesheet" href="style.css" />
<script src="script.js"></script>
<style>
  .book{border:solid 1px blue;}
  .unavailable{border-color: red;}
</style>
</head>

<body>
<h1>Hello Plunker!</h1>
<div ng-class="{'unavailable' : true}" class="book">
        Moby Dick
  </div>

  <script>
    var app=angular.module("app",[]);
    angular.bootstrap(document,["app"]);
  </script>
</body>

</html>

Answer №2

I'm not completely certain about your requirements, but it seems like you're looking to display different content based on a condition.

I've taken your HTML and created a sample. Please verify if this is what you were looking for. The controller code looks something like this:

function MyCtrl($scope) {
$scope.book={Availability:12};

}

View Sample Code

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