angular.js ng-repeat for creating grid

Question

I\'m trying to create a grid using bootstrap 3 and angularjs.

The grid I\'m trying to create is this, repeated using ng-repeat.

        
                      

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Answer 1

This should work

<div ng-repeat="item in items">
    <div ng-class="{row : ($index % 3 == 0)}">
        ... 
    </div>
</div>

Answer 2

An Angular2 version of @CodeExpress's pure angular solution.

alphabet: string[] = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 
                   'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'];

<div *ngIf='alphabet && alphabet.length'>
    <div *ngFor='#letter of alphabet; #i = index' >
        <div class="row" *ngIf='i % 4 == 0'>
            <div class="col-md-3" *ngFor='#n of [i,i+1,i+2,i+3]'>
                {{alphabet[n]}}
            </div>
        </div>
    </div>
</div>

Answer 3

The accepted answer is the obvious solution however presentation logic should remain in view and not in controllers or models. Also I wasn't able to get the OP's solution to work.

Here are two ways to do create grid system when you have a flat list(array) of items. Say our item list is a alphabet:

Plunker here

$scope.alphabet = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 
                   'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'];

Method 1:

This is a pure angular solution.

<div class="row" ng-repeat="letter in alphabet track by $index" ng-if="$index % 4 == 0">
  <div class="col-xs-3 letter-box" 
       ng-repeat="i in [$index, $index + 1, $index + 2, $index + 3]" 
       ng-if="alphabet[i] != null">
    <div>Letter {{i + 1}} is: <b> {{alphabet[i]}}</b></div>
  </div>
</div>

The outer loop execute after every 4 iterations and creates a row. For each run of the outer loop the inner loop iterates 4 times and creates columns. Since the inner loop runs 4 times regardless of whether we have elements in array or not, the ng-if makes sure that no extraneous cols are created if the array ends before inner loop completes.

Method 2:

This is much simpler solution but requires angular-filter library.

<div class="row" ng-repeat="letters in alphabet | chunkBy:4">
  <div class="col-xs-3 letter-box" ng-repeat="letter in letters" >
    <div>Letter {{$index + 1}} is: <b> {{letter}}</b></div>
  </div>
</div>

The outer loop creates groups of 4 letters, corresponding to our 'row'

[['A', 'B', 'C', 'D'], ['E', 'F', 'G', 'H'], ... ]

The inner loop iterates over the group and creates columns.

Note: Method 2 might require evaluation of filter for each iteration of outer loop, hence method 2 may not scale very well for huge data sets.

Answer 4

One might say that the below solution does not follow the grid rules of having row divs, but another solution would be to drop the row class ( or use it outside of the ng-repeat) and use the clearfix class instead:

<div class="col-md-12">
  <div ng-repeat="item in items">
    <div ng-class="{'clearfix': $index%3 === 0}"></div>
    <div class="col-md-4">{{item}}</div>
  </div>
</div>

As far as I can see, this looks almost the same as with row class, but please comment on possible flaws (except the one I mentioned above).

Answer 5

A bit late answer but i used this and i belive it is better for some cases. You can use Angular Filter package and its ChunkBy filter for this. Although this package would be a heavy lifting for this single task, there is other useful filters in it for different tasks. The code i used is like this:

<div class="row mar-t2" ng-repeat="items in posts | chunkBy:3">
    <div class="col-md-4" ng-repeat="post in items">
        <img ng-src="{{post.featured_url}}" class="img-responsive" />
        <a ng-click="modalPop(post.id)"><h1 class="s04-bas2">{{post.title.rendered}}</h1></a>
        <div class="s04-spotbox2" ng-bind-html="post.excerpt.rendered"></div>
    </div>
</div>