Ember.js is an open-source JavaScript framework used for developing large client-side web applications which is based on Model-View-Controller (MVC) architecture. Ember.js is one of the most widely used front-end application frameworks. It is made to speed up development and increase productivity. Currently, it is utilized by a large number of websites, including Square, Discourse, Groupon, Linked In, Live Nation, Twitch, and Chipotle.
The action() method is used to create the function that will be invoked when a matching action is triggered from within templates and that application’s current route is this route.
Syntax:
action:{ // functions };
Parameters:
- functions: These are the functions that are invoked when a matching action will trigger from within templates.
Steps to Install and Run Ember.js:
Step 1: To run the following examples you will need to have an ember project with you. To create one, you will need to install ember-cli first. Write the below code in the terminal:
npm install ember-cli
Step 2: Now you can create the project by typing in the following piece of code:
ember new <project-name> --lang en
To start the server, type:
ember serve
Example 1: Type the following code to generate the route for this example:
ember generate route action1
app/controllers/action1.js
Javascript
import Controller from '@ember/controller';import { action, find } from '@ember/object';import Ember from 'ember'let Student = Ember.Object.extend({ // These will be supplied by `create` firstName: null, lastName: null, fullName: Ember.computed('firstName', 'lastName', function () { return `${this.get('firstName')} ${this.get('lastName')}`; }), Changed: Ember.observer('fullName', function () { console.log(`fullName changed to: ${this.get('fullName')}`); })});export default class Array2Controller extends Controller { stu2 = Student.create({ firstName: 'Kasual', lastName: 'Singh', Id: 'stu2' }); stu0 = Student.create({ firstName: 'Yehuda', lastName: 'Katz', Id: 'stu0' }); stu1 = Student.create({ firstName: 'Yella', lastName: 'melo', Id: 'stu1' }); stu3 = Student.create({ firstName: 'Pokhu', lastName: 'Verma', Id: 'stu3' }); value = this.stu3.get('Id'); students = [this.stu0, this.stu1, this.stu2, this.stu3] @action print(data1, data2) { let ans = this.students.findBy('Id', data1) ans.set('firstName', data2) }} |
app/templates/action1.hbs
HTML
<table> <tr> <th>Name</th> <th>Id</th> </tr> {{#each this.students as |detail|}} <tr> <td>{{detail.fullName}}</td> <td>{{get detail "Id"}}</td> </tr> {{/each}}</table><br />{{input value=this.value}}{{input value=this.value2}}<br /><input type="button" id="set-code" value="Update Student details" {{action "print" this.value this.value2}}/> |
Output:
Ember.js Controller actions Property
Example 2: Type the following code to generate the route for this example:
ember generate route action2
app/routes/action2.js
Javascript
import Route from '@ember/routing/route';export default class StudentsRoute extends Route { p1 = [ 'Digital Camera', 'Jugs, cups & straws', 'Balloons', 'Scissors', 'Cold Drink', 'Table', ]; model() { return this.p1; } setupController(controller, model) { super.setupController(controller, model); controller.set('p1', this.p1); }} |
app/controllers/action2.js
Javascript
import Ember from 'ember';export default Ember.Controller.extend({ value: 'value', init() { this._super(...arguments); this.addObserver('value', this, 'Change'); }, Change() { console.log('value changed'); }, actions: { remove(data) { this.p1.set('[]', this.p1.without(data)); }, print() { let ans = this.p1.set('[]'); alert(ans.join('\n')) }, },}); |
app/templates/action2.hbs
HTML
<ul><h3>List is : </h3> {{#each @model as |party|}} <li>{{party}}</li> {{/each}}</ul><br />{{input value=this.value}}<br/><input type="button" id="check-atIndex" value="Remove" {{action 'remove' this.value}}/><br/><br/><input type="button" id="print-item" value="Print All Items" {{action 'print' this.value}}/> |
Output:
Ember.js Controller actions Property
Reference: https://api.emberjs.com/ember/4.6/classes/Controller/properties/actions?anchor=actions
