What is the best way to activate DOM manipulation once a partial view has been loaded in AngularJS?

Question

What is the best way to activate DOM manipulation once a partial view has been loaded in AngularJS?

What is the best approach to manipulate the DOM after a partial view loads in AngularJS?

If I were using jQuery, I could utilize

$(document).ready(function(){
    // do stuff here
}

However, with Angular, specifically when working with partial views, how can this be achieved? As an example, consider the following simple non-interactive Angular app (with HTML and JS on the same page source):

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Angular Question</title>
</head>
<body data-ng-app="demoApp">
    <div data-ng-view=""></div>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.7/angular.min.js"></script>
    <script>
        var app = angular.module('demoApp', []);

        var controller = {
            demoController: function ($scope, demoFactory) {
                $scope.fruits = demoFactory.getFruits();
            }
        };

        var factory = {
            demoFactory: function () {
                var fruits = ['apples', 'bananas', 'cherries'];
                var factory = {
                    getFruits: function () {
                        return fruits;
                    }
                };
                return factory;
            }
        }

        function appRoute($routeProvider) {
            $routeProvider
                .when('/step-1',
                    {
                        controller: 'demoController',
                        templateUrl: 'partial.html'
                    })
                .otherwise({ redirectTo: '/step-1' });
        };


        app.config(appRoute);
        app.factory(factory);
        app.controller(controller);

    </script>
</body>
</html>

This app includes the following partial:

<ul>
    <li data-ng-repeat="fruit in fruits">{{fruit}}</li>
</ul>

In this scenario, if I wanted to apply a "active" class to the first list item after the partial view finishes loading, how would I achieve this?

javascript angularjs

Answer 1

Answer №1

Instead of focusing on manipulating the DOM, consider shifting your perspective. The active element is not necessarily the first LI, but rather the first fruit that has been chosen.

To start, introduce the concept of a selected fruit:

var fruits = [
  { name: 'apples', active: true },
  { name: 'bananas', active: false },
  { name: 'cherries', active: false }
]

Next, incorporate this attribute using ng-class in your Angular template:

<ul>
    <li data-ng-repeat="fruit in fruits" ng-class="{ active: fruit.active }">{{fruit.name}}</li>
</ul>

Now you have the flexibility to update your fruits array and modify which fruit is selected, like so:

$scope.fruits[2].active = true;

Answer 2

Instead of focusing on manipulating the DOM, consider shifting your perspective. The active element is not necessarily the first LI, but rather the first fruit that has been chosen.

To start, introduce the concept of a selected fruit:

var fruits = [
  { name: 'apples', active: true },
  { name: 'bananas', active: false },
  { name: 'cherries', active: false }
]

Next, incorporate this attribute using ng-class in your Angular template:

<ul>
    <li data-ng-repeat="fruit in fruits" ng-class="{ active: fruit.active }">{{fruit.name}}</li>
</ul>

Now you have the flexibility to update your fruits array and modify which fruit is selected, like so:

$scope.fruits[2].active = true;

Answer 3

Answer №2

AngularJS utilizes a model-driven approach. To modify the DOM, simply adjust the data instead.

You have the option to utilize the $first property to activate the first item in the repeater.

<ul>
    <li ng-class="{active : $first}" data-ng-repeat="fruit in fruits">{{fruit}}</li>
</ul>

Alternatively, if you wish to manually activate any item within the repeater by clicking on it, you can change the activate field within the model object.

<ul>
    <li ng-class="{true: 'active', false: ''}[fruit.active]" ng-repeat="fruit in fruits" ng-click="activate(fruit)">{{fruit.name}}</li>
</ul>

Make use of this specific data structure

var factory = {
    demoFactory: function () {
        var fruits = [{
            name: 'apples',
            active: true
        }, {
            name: 'bananas',
            active: false
        }, {
            name: 'cherries',
            active: false
        }]
        var factory = {
            getFruits: function () {
                return fruits;
            }
        };
        return factory;
    }
}

Include the following code in the controller.

$scope.activate = function (fruit) {
    console.log(fruit)
    fruit.active = true;
}

DEMO

Answer 4

AngularJS utilizes a model-driven approach. To modify the DOM, simply adjust the data instead.

You have the option to utilize the $first property to activate the first item in the repeater.

<ul>
    <li ng-class="{active : $first}" data-ng-repeat="fruit in fruits">{{fruit}}</li>
</ul>

Alternatively, if you wish to manually activate any item within the repeater by clicking on it, you can change the activate field within the model object.

<ul>
    <li ng-class="{true: 'active', false: ''}[fruit.active]" ng-repeat="fruit in fruits" ng-click="activate(fruit)">{{fruit.name}}</li>
</ul>

Make use of this specific data structure

var factory = {
    demoFactory: function () {
        var fruits = [{
            name: 'apples',
            active: true
        }, {
            name: 'bananas',
            active: false
        }, {
            name: 'cherries',
            active: false
        }]
        var factory = {
            getFruits: function () {
                return fruits;
            }
        };
        return factory;
    }
}

Include the following code in the controller.

$scope.activate = function (fruit) {
    console.log(fruit)
    fruit.active = true;
}

DEMO

Answer 5

Answer №3

To ensure each element has the active property set, you can add it to the model and check for its presence in every element.

var controller = {
    demoController: function ($scope, demoFactory) {
        $scope.fruits = demoFactory.getFruits();
        $scope.fruits[0].isActive = true; // somewhat of a workaround
    }
};

<ul>
    <li data-ng-repeat="fruit in fruits" ng-class="{ active: fruit.isActive }}">{{fruit}}</li>
</ul>

While this approach may not be ideal, especially with AngularJS, it is always recommended to update the model directly to maintain a single definitive representation of your application's state.

Answer 6

To ensure each element has the active property set, you can add it to the model and check for its presence in every element.

var controller = {
    demoController: function ($scope, demoFactory) {
        $scope.fruits = demoFactory.getFruits();
        $scope.fruits[0].isActive = true; // somewhat of a workaround
    }
};

<ul>
    <li data-ng-repeat="fruit in fruits" ng-class="{ active: fruit.isActive }}">{{fruit}}</li>
</ul>

While this approach may not be ideal, especially with AngularJS, it is always recommended to update the model directly to maintain a single definitive representation of your application's state.

What is the best way to activate DOM manipulation once a partial view has been loaded in AngularJS?

Answer №1

Answer №2

Answer №3

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