Interested in gaining knowledge on how to define basic properties on the model within Angular.JS?

Question

Interested in gaining knowledge on how to define basic properties on the model within Angular.JS?

As I dive into the demos on the angular.js website, one aspect that caught my attention is the lack of explicit model/properties definition compared to other frameworks like durandal.

For instance, how can we access the property "yourName" in a particular example without having it declared beforehand? It's puzzling because there doesn't seem to be a traditional model setup in place. (tutorial 1)

In another scenario, we use the variable "todoText" even though it hasn't been defined in the model. How does Angular manage to handle this? (tutorial 2)

It appears there are intricacies in Angular that I'm not fully grasping yet. Please guide me if I'm misconstruing any concepts.

javascript angularjs durandal

Answer 1

Answer №1

Both tutorials share a common concept.

For example, in the first tutorial, the variable yourName is defined as the model of the input (ng-model="yourName"). This automatically links to the controller and can be used later to display the entered name using {{yourName}}.

If there is a controller associated with this, you can access yourName using $scope.yourName. If you predefine it and assign a value to it, the input will have that value by default.

Answer 2

Both tutorials share a common concept.

For example, in the first tutorial, the variable yourName is defined as the model of the input (ng-model="yourName"). This automatically links to the controller and can be used later to display the entered name using {{yourName}}.

If there is a controller associated with this, you can access yourName using $scope.yourName. If you predefine it and assign a value to it, the input will have that value by default.

Answer 3

Answer №2

ng-model="yourName" translates to $scope.yourName="" in your controller.

Consider this example for better understanding.

HTML Code:

<body ng-controller="MainCtrl">
  <input ng-model="scopedInHtml" placeholder="Enter Stuff Here"/>
</body>

JavaScript Code:

var app = angular.module('plunker', []);
app.controller('MainCtrl', function($scope) {
  $scope.$watch('scopedInHtml', function(newVal, oldVal){
    console.log(newVal);
  });
});

Check out a Plunker demo here: http://plnkr.co/edit/WeJP0IWopUUrYVEuxDTC?p=preview

Answer 4

ng-model="yourName" translates to $scope.yourName="" in your controller.

Consider this example for better understanding.

HTML Code:

<body ng-controller="MainCtrl">
  <input ng-model="scopedInHtml" placeholder="Enter Stuff Here"/>
</body>

JavaScript Code:

var app = angular.module('plunker', []);
app.controller('MainCtrl', function($scope) {
  $scope.$watch('scopedInHtml', function(newVal, oldVal){
    console.log(newVal);
  });
});

Check out a Plunker demo here: http://plnkr.co/edit/WeJP0IWopUUrYVEuxDTC?p=preview

Interested in gaining knowledge on how to define basic properties on the model within Angular.JS?

Answer №1

Answer №2

Similar questions

Sending a Django form using AJAX and jQuery: A step-by-step guide

The ng-repeat directive is limited to functionality only within parent divs that have the id of

Vue dynamic components fail to re-render within a v-for loop upon data changes

Coordinating communication between separate AngularJS directives autonomously

Discovering the value of a checkbox using jQuery and Ajax

Issue with Knockout.js: Parsing error in bindings - SyntaxError: Unexpected token `};`

Converting JSON data into XML format

My objective is to modify a JSON object based on the chosen value from a dropdown menu

establishing a connection between an AngularJS application and an ExpressJS backend

Determining If Props Have Been Undefined In React

Angular's forEach function seems to be stuck and not loop

Having difficulty retrieving the element's identifier

Here's a guide on using a button to toggle the display of password value in Angular, allowing users to easily hide

When a user clicks on JavaScript, it will return true if clicked and false if

What is the best way to dynamically add getJSON's data to a div whenever the loadmore button is clicked?

Increasing the variable by 1 in PHP will result in the variable value being incremented to 1

What is the correct way to display or hide a button based on my specific situation?

Passing data from the Config Controller in AngularJS to another ControllerAre you looking to

providing numerous values for a thymeleaf attribute

Updating React state from another component - using useState