Ember.js RouterService incrementProperty() Method

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 incrementProperty() method is used to set a property’s value to its current value plus a certain amount.

Syntax:

incrementProperty(key,increment)

Parameters:

• key: The name of the property to decrement.
• increment: The amount to reduce.

Returns: The new incremented value.

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 students

app/route/students.js

Javascript

import Route from '@ember/routing/route';
import EmberObject from '@ember/object';

const Student = EmberObject.extend({
    init() {
        console.log(`Name is ${this.get('name')}`);
    }
});

export default class StudentsRoute extends Route {
    student;
    createStudent() {
        let student = Student.create({
            name: 'Alix Mainston',
            gender: 'F',
            class: 9,
            grade: 'B',
            marks: 98,
            pocket_money: 9643,
        });
        return student;
    }
    getGrade(student) {
        return student.get('grade');
    }
    setGender(student) {
        return student.set('gender', 'F');
    }
    decreaseMarks(student) {
        student.decrementProperty('marks');
    }
    increasePocketMoney(student) {
        student.incrementProperty('pocket_money', 1000);
    }
    model() {
        this.student = this.createStudent();
        this.student.grade = this.getGrade(this.student);
        this.student.gender = this.setGender(this.student);
        this.decreaseMarks(this.student);
        this.increasePocketMoney(this.student);
        return this.student;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('student', this.student);
    }
}

app/template/students.hbs

HTML

{{page-title "Students"}}
<h1>Details:</h1>
<div>Name: {{this.student.name}}</div>
<div>Gender: {{this.student.gender}}</div>
<div>Class: {{this.class}}</div>
<div>Grade: {{this.student.grade}}</div>
<div>Marks: {{this.student.marks}}</div>
<div>Pocket Money: {{this.student.pocket_money}}</div>
{{outlet}}

Output:

Example 2: Type the following code to generate the route for this example:

ember generate route details

app/route/details.js

Javascript

import Route from '@ember/routing/route';
import EmberObject from '@ember/object';
import StudentsRoute from './students';

const Person = EmberObject.extend({
    init() {
        console.log('Init Function called....');
    },
});

export default class DetailsRoute extends Route {
    person;
    createPerson() {
        let person = Person.create({
            name: 'Anubhav',
            mobile: '1298119967',
            age: 20,
            salary: 10000,
            city: 'Patna',
            country: 'India',
            gender: 'M',
            zipCode: '800020',
        });
        return person;
    }
    changeName(person) {
        return person.set('name', 'Aayush');
    }
    getGender(person) {
        return person.get('gender');
    }
    increaseSalary(person) {
        person.incrementProperty('salary', 10000);
    }
    decreaseAge(person) {
        person.decrementProperty('age');
    }
    model() {
        this.person = this.createPerson();
        this.person.name = this.changeName(this.person);
        this.person.gender = this.getGender(this.person);
        this.increaseSalary(this.person);
        this.decreaseAge(this.person);
        console.log(this.person);
        return this.person;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('person', this.person);
    }
}

app/template/details.hbs

HTML

{{page-title "Details"}}
<h1>Person</h1>
<div>Name: {{this.person.name}}</div>
<div>Age: {{this.person.age}}</div>
<div>Salary: {{this.person.salary}}</div>
<div>Gender: {{this.person.gender}}</div>
<div>Zip Code: {{this.person.zipCode}}</div>
<div>Mobile: {{this.person.mobile}}</div>
{{outlet}}

Output:

Reference: https://api.emberjs.com/ember/4.7/classes/RouterService/methods