Exploring the wonders of AngularJS ng-repeat with nested elements

In my current project, I am trying to enhance the layout by inserting a <br/> tag after every nth element. The desired structure is as follows:

<div class="container">
    <div>
        <span>1</span>
        <span>2</span>
        <br/>
        <span>3</span>
    </div>
</div>

The approach I initially took was inspired by how I have utilized ng-repeat with <ul/> elements in the past, like so:

<div class="container">
    <ul ng-repeat="item in list">
        <li>{{item}}</li>
    </ul>
</div>

which normally generates a list similar to this:

<div class="container">
    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
    </ul>
</div>

However, when attempting something comparable using <div/>:

<div class="container">
    <div ng-repeat="item in list">
        <span>{{item}}</span>
    </div>
</div>

I noticed a discrepancy from the behavior observed with <ul/>. It results in:

<div class="container">
    <div>
        <span>1</span>
    </div>
    <div>
        <span>2</span>
    </div>
    <div>
        <span>3</span>
    </div>
</div>

This leads to two questions:

  • Why does ng-repeat behave differently on a <ul/> compared to a <div/>
  • Is there a way to achieve multiple span elements followed by a line break without enclosing each span within a separate div?

Answer №1

https://angular.io/api/ngForOf

The ngForOf directive creates a template for each item in a given collection. Each template instance has its own scope where the loop variable represents the current item from the collection, and $index represents the index of the item.

When using ngForOf in your loop, you have access to the following local variables: $index, $first, $middle, $last, $even, $odd. Except for $index, each variable returns a boolean value indicating whether the item meets certain conditions, such as being even or odd. You may also want to check out the NgClassEven directive.

Answer №2

Using ng-repeat can be confusing, especially when combined with the ul tag.

For example, consider this code snippet:

http://plnkr.co/edit/ig766DNNlQXihNS5ZGdY?p=preview

Here is a separated view of the code:

<ul class="example-animate-container">
<li class="animate-repeat" ng-repeat="friend in friends">

And another example:

<legeng>ul - ng repeat</legeng>
<ul class="example-animate-container" ng-repeat="friend in friends">

Answer №3

Give this a shot.

<div ng-repeat="num in [1,2,3,4,5,6]">
  <div>{{num}}</div>
  <div ng-if="$index%2">customize as needed</div>
</div>

Here's how the outcome might appear.

1
2
customize as needed
3
4
customize as needed
5
6
customize as needed

Answer №4

Latest Update:

In the case that you wish to add a <br> after every nth occurrence of <span>, you can modify your HTML as shown below:

<div id="container">
    <span ng-repeat="item in list">{{item}}

          <br ng-if="$index % 2">
     </span>
</div>

After testing in Firefox, Chrome, and Internet Explorer, the output will be displayed similar to this:

12
34
56

To achieve this effect, simply remove the wrapping div elements and update your HTML accordingly (live preview: http://codepen.io/larryjoelane/pen/qbJXJm). The ng-repeat directive replicates the child elements within the parent element. In the provided example, the <li> elements do not contain any child elements, unlike the default behavior where they are children of the <ul> element. Conversely, <span> elements are not inherently children of <div> elements. This behavior is consistent across different elements such as <table> with its respective tags.

HTML code snippet:

<div ng-app="app" ng-controller="spans">

   <div id="container">
        <span ng-repeat="item in list">{{item}}
          </span>
  </div> 

      </div>

Additional Angular/JavaScript logic:

angular.module("app", []).controller("spans", ["$scope", function($scope) {

  $scope.list = [1, 2, 3, 4, 5, 6];

}]);

If desired output includes a line break after each span, apply the following CSS:

#container span {
  display: block;
}

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