AngularJS - How to use ng-if without HTML element

JavascriptAngularjsAngularjs Ng-If

Javascript Problem Overview


Is there a way to tell AngularJS not to display the top HTML element which has ng-if directive. I want angular to display child content only.

Angular Code:

    <div ng-if="checked" id="div1">
      <div id="div2">ABC</div>
      <div id="div3">KLM</div>
      <div id="div4">PQR</div>
   </div>

Rendered HTML:

   <div id="div1"> 
      <div id="div2">ABC</div>
      <div id="div3">KLM</div>
      <div id="div4">PQR</div>
   </div>

What I want:

   <div id="div2">ABC</div>
   <div id="div3">KLM</div>
   <div id="div4">PQR</div>

Here is a fiddle. http://jsfiddle.net/9mgTS/. I do not want #div1 in HTML. I just want #div2,3,4 if checked is true.

A possible solution can be adding ng-if to all child elements but I do not want to do this.

Javascript Solutions


Solution 1 - Javascript

There's a currently-undocumented pair of directives, ng-if-start and ng-if-end, that you can use for this. They behave analogously to the documented ng-repeat-start and ng-repeat-end directives, and you can see the unit tests for them if you like.

For example, given the following code:

<ul>
  <li ng-if-start="true">a</li>
  <li>b</li>
  <li>c</li>
  <li ng-if-end>d</li>
  <li ng-if-start="false">1</li>
  <li>2</li>
  <li>3</li>
  <li ng-if-end>4</li>
</ul>

the first four lis will be shown and the final four lis will be hidden.

Here's a live example on CodePen: http://codepen.io/anon/pen/PqEJYV

There are also ng-show-start and ng-show-end directives that work exactly the way you would expect them to.

Solution 2 - Javascript

If you are happy to create a custom directive, you can apply the ng-if to the children programmatically and flatten the DOM in the process:

Directive Code:

.directive('ngBatchIf', function() {
    return {
        scope: {},
        compile: function (elm, attrs) {
            // After flattening, Angular will still have the first element
            // bound to the old scope, so we create a temporary marker 
            // to store it
            elm.prepend('<div style="display: none"></div>');
            
            // Flatten (unwrap) the parent
            var children = elm.children();
            elm.replaceWith(children);
            
            // Add the ng-if to the children
            children.attr('ng-if', attrs.ngBatchIf);
            
            return {
                post: function postLink(scope, elm) {
                    // Now remove the temporary marker
                    elm.remove();
                }
            }
        }
    }
})

Angular Code:

<div id="div1" ng-batch-if="checked">
    <div id="div2">ABC</div>
    <div id="div3">KLM</div>
    <div id="div4">PQR</div>
</div>

Rendered HTML:

<div id="div2" ng-if="checked">ABC</div>
<div id="div3" ng-if="checked">KLM</div>
<div id="div4" ng-if="checked">PQR</div>

Fiddle: http://jsfiddle.net/o166xg0s/4/

Solution 3 - Javascript

Here's an Angular 1.21 solution:

HTML:

<div ng-app="app" ng-controller="ctrl">
    <div ng-iff="checked" id="div1">
        <div id="div2">ABC</div>
        <div id="div3">KLM</div>
        <div id="div4">PQR</div>
    </div>
    <button ng-click="toggleCheck()">Toggle Check</button>
</div>

JAVASCRIPT:

angular.module('app', []).
controller('ctrl', function ($scope) {
    $scope.checked = true;

    $scope.toggleCheck = function () {
        $scope.checked = !$scope.checked;
    };
}).
directive('ngIff', function ($compile) {
    return {
        compile: function compile(tElement, tAttrs, transclude) {
            return {
                pre: function preLink(scope, iElement, iAttrs, controller) {
                    var bindingElem = iElement.attr('ng-iff');
                    var children = iElement.children();
                    
                    angular.forEach(children,function(c){
                        angular.element(c).attr('ng-if',bindingElem);
                    });
                    
                    $compile(children)(scope, function(newElem){
                        iElement.replaceWith(newElem);
                    });
                }
            };
        }
    };
});

JSFIDDLE.

Solution 4 - Javascript

I dont understand why you dont want to use a parent div, but this would be a good solution if you have +20 divs:

HTML

   <div ng-repeat="div in divs" ng-if="checked" id="{{div.name}}">{{div.content}}</div>

JS

app.controller('myCtrl', function($scope) {
    $scope.checked = true;
    $scope.divs = {
         {'name': 'div2', content:'ABC'},
         {'name': 'div3', content:'KLM'},
         {'name': 'div4', content:'PQR'}
    }
});

Solution 5 - Javascript

Seems to be a old question but I got similar requirement

<div ng-if="checked" id="div1">
      <div id="div2">ABC</div>
      <div id="div3">KLM</div>
      <div id="div4">PQR</div>
</div>

I managed like this

<mytag ng-if="checked" id="div1">
      <div id="div2">ABC</div>
      <div id="div3">KLM</div>
      <div id="div4">PQR</div>
</mytag>

where mytag is just any name which is not a html element as long as it does not disturb the layout, this works for me

Solution 6 - Javascript

Try this out:- http://jsfiddle.net/adiioo7/9mgTS/1/

div1 is the parent container for div2,div3,div4, if you don't want div1 in the output html use this:-

<div ng-app="App">Click me:
    <input type="checkbox" ng-model="checked" ng-init="checked=true" />
    <br/>Show when checked:
    <div class="div2" ng-if="checked">ABC</div>
    <div class="div3" ng-if="checked">KLM</div>
    <div class="div4" ng-if="checked">PQR</div>
</div>

EDIT:-

Using angular js and jQuery:-http://jsfiddle.net/adiioo7/9mgTS/3/

Assign a common class (example myClass) to all elements pertaining to that group.

JS:-

angular.module('App', []);

function myController($scope) {
    $scope.change = function () {
        angular.element(".myClass").toggle();
    };
}

HTML:-

<div ng-app="App" ng-Controller="myController">Click me:
    <input type="checkbox" ng-change="change()" ng-model="checked" ng-init="checked=true" />
    <br/>Show when checked:
    <div id="div2" class="myClass">ABC</div>
    <div id="div3" class="myClass">KLM</div>
    <div id="div4" class="myClass">PQR</div>
</div>

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Content TypeOriginal AuthorOriginal Content on Stackoverflow
QuestionwaqasView Question on Stackoverflow
Solution 1 - JavascriptMark AmeryView Answer on Stackoverflow
Solution 2 - JavascriptseanhodgesView Answer on Stackoverflow
Solution 3 - JavascriptAmir PopovichView Answer on Stackoverflow
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Solution 5 - JavascriptJayView Answer on Stackoverflow
Solution 6 - JavascriptAditya SinghView Answer on Stackoverflow