Changing Body Background Color with Angularjs

Changing body background color with angularjs

To decouple such a dynamic change in style, data, content and etc., it is often practical to create another angular module that contains an interface(Custom Provider) that can give you access to these changes before and after the configuration level. Here is a plunker to provide a view of what I'll be discussing below.

For this answer, I have created a small module(route-data.js) with a provider, RouteData, which exposes
two function configurations:

applyConfig() - assigns settings to be accessed in the RouteData service.
hookToRootScope() - hooks the RouteData service in the $rootScope hence making it available to all child scopes to be created and the entire application.

The RouteData provider has a RouteData() service that provides access to methods which sets and gets RouteData settings that will be provided in the $routeProvider configuration.

(If you're not familiar with providers and services, read more about it here)

(If you're not familiar with the config() and run() methods, you can read more in here)

route-data.js

angular.module('RouteData', []).

provider('RouteData', function () {
  var settings = {};
  var hookToRootScope = false;

  this.applyConfig = function(newSettings) {
    settings = newSettings;
  };

  this.hookToRootScope = function(enableRootScopeHook) {
    hookToRootScope = enableRootScopeHook;
  };

  function RouteData() {

    this.set = function(index, value) {
      settings[index] = value;
    };

    this.get = function(index) {
      if(settings.hasOwnProperty(index)) {
        return settings[index];
      } else {
        console.log('RouteData: Attempt to access a propery that has not been set');
      }
    };

    this.isHookedToRootSope = function() {
      return hookToRootScope;
    };
  }

  this.$get = function() {
      return new RouteData();
  };
}).

run(['$location', '$rootScope', 'RouteData', function($location, $rootScope, RouteData) {
  if(RouteData.isHookedToRootSope()) {
    $rootScope.RouteData = RouteData;
  }

  $rootScope.$on('$routeChangeStart', function(event, current, previous) {
    var route = current.$$route;
    if(typeof(route) !== 'undefined' && typeof(route['RouteData']) !== 'undefined') {
      var data = route['RouteData'];
      for(var index in data)
        RouteData.set(index, data[index]);
    } 
  });
}]);

The script below shows how to use the RouteData Module above via injecting the RouteDataProvider in the configuration level and apply default configurations such as the bodyStyle via RouteDataProvider.applyConfig(), you may also add more settings before the application is fully running. Hook it up in the $rootScope by setting RouteDataProvider.hookToRootScope() to true. Lastly, appending data, RouteData e.g.

RouteData: {
      bodyStyle: {
        'background-color': 'green'
      }
    }

to be sent in by the $routeProvider and processed by the run() method defined in the RouteData module which initializes the settings for the RouteData services to be accessed in the application.

script.js

angular.module('app', ['ngRoute', 'RouteData']).

config(['$routeProvider', 'RouteDataProvider', function($routeProvider, RouteDataProvider) {
  RouteDataProvider.applyConfig({
    bodyStyle: {
      'background-color': 'white'
    }
  });

  RouteDataProvider.hookToRootScope(true);

  $routeProvider.when('/landing', {
    RouteData: {
      bodyStyle: {
        'background-color': 'green'
      }
    },
    templateUrl: 'landing.html',
    controller: 'LandingController'  
  }).when('/login', {
    RouteData: {
     bodyStyle: {
         'background-color': 'gray',
         padding: '10px',
         border: '5px solid black',
         'border-radius': '1px solid black'
     }
    },
    templateUrl: 'login.html',
    controller: 'LoginController'
  }).otherwise({
    redirectTo: '/landing'
  });

}]).

controller('LoginController', ['$scope', function($scope) {

}]).

controller('LandingController', ['$scope', function($scope) {

}]);

So the final piece of code to be added in your index page or any other page would be something like this.

A portion of index.html

<body ng-style="RouteData.get('bodyStyle')"> 
    <a href="#/landing">Landing</a> | 
    <a href="#/login">Login</a>
    <div ng-view></div>
</body>

Set different body background for different pages when using AngularJS template and ui-router

In a global controller (which is applied to either <html> or <body> tag), register an event:

myApp.controller('GlobalCtrl', function($scope) {
    // Event listener for state change.
    $scope.$on('$stateChangeStart', function(event, toState, toParams) {
        $scope.bodyClass = toState.name + '-page';
    });
});

Now, in your HTML:

<body class="{{bodyClass}} foo bar" ng-controller="GlobalCtrl">
   <!-- your content -->
</body>

Now, in your CSS:

body.login-page {
    background: green;
}

body.home-page {
    background: red;
}

Change background and font color with angularjs

You can use ng-class to apply new classes to elements. The docs are here: https://docs.angularjs.org/api/ng/directive/ngClass

I've done something similar in an app of my own, where selecting a theme from the options page applies a new class to the main content section of each page. I don't have the code available right now but I can post it in later if you would like.

How to change the background color of the outermost body tag with Angular

There is an easier way in your component

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {

    constructor() {
        document.body.style.background = 'rgba(0, 0, 0, .6)';
    }

}

Or with simple CSS in your src/styles.css

body {
    background: whatever;
}

How to change background color of an item based on the click in AngularJs

var app = angular.module("ap",[]);
app.controller("con",function($scope){   $scope.changeIndex = function(index){    $scope.selected = index;  }});

.blue{  color: blue;}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script><body ng-app="ap" ng-controller="con"><div ng-repeat="n in [10, 20, 30, 40] track by $index">  <div ng-class="{blue: selected==$index}" ng-click="changeIndex($index)">{{n}}</div>  </div></body>

How to change whole page background-color in Angular

You can do this from any of your component. For example:

export class AppComponent implements AfterViewInit {
    constructor(private elementRef: ElementRef) {}
    ngAfterViewInit() {
        this.elementRef.nativeElement.ownerDocument
            .body.style.backgroundColor = 'yourColor';
    }
}

By using this.elementRef.nativeElement.ownerDocument, you can access the window.document object without violating any angular convention. Of course, you can directly access the document object using window.document but, I think it would be better to access it through ElementRef .

How to change body background image by clicking a button in Angular Js?

You have a problem with the syntax. You need to wrap background-image key in quotes, otherwise it's not a valid identifier. It works with background because having nothing but alpha characters, it doesn't require quotes.

<input type="button" class="bg numbers" ng-click="myStyle={'background-image': 'url(../images/count2.png)'}">

Then it will work properly:

angular.module('demo', [])

<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.8/angular.js"></script>
<body ng-app="demo" ng-style="myStyle">
  <input type="button" class="bg numbers" ng-click="myStyle={'background-image': 'url(http://subtlepatterns2015.subtlepatterns.netdna-cdn.com/patterns/dark_embroidery.png)'}" value="Set background">
</body>

change background color with angularjs

If you are using ng-repeat then I would recommend ng-class.

<h1 ng-click="isReadClick(q.id)" ng-class="q.isRead ? 'green' : 'red'"> {{q.title}}</h1>

In the example, if q.isRead value is a true then set class green else set class red.

How to set background color for a div dynamically in angular?

You can use ng-style to achieve this

<div ng-style="{'background-color':vitalItem.value.color}" >

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