Ember.js Ember.NativeArray decrementProperty() 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 decrementProperty() method is used to set a property to the current value minus some amount.

Syntax:

decrementProperty( keyName, decrement );

Parameters:

• keyName: It is the name of property whose value we want to decrease.
• decrement: It is the amount to decrement. Default is 1.

Return Value: A new property 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 decrement1

app/routes/decrement1.js

Javascript

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

export default class WebsitesRoute extends Route {
    food = [
        {
            food: 'apple',
            isFruit: true,
            quant: '1',
        },
        {
            food: 'Potato',
            isFruit: false,
            quant: '2',
        },
        {
            food: 'Banana',
            isFruit: true,
            quant: '1',
        },
        {
            food: 'Burgur',
            isFruit: false,
            quant: '2',
        },
        {
            food: 'Orange',
            isFruit: true,
            quant: '1',
        },
        {
            food: 'sandwitch',
            isFruit: false,
            quant: '2',
        },
        {
            food: 'bean',
            isFruit: false,
            quant: '2',
        },
    ];
    temp;
    model() {
        return this.food;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('food', this.food);
        controller.set('temp', this.temp);
        controller.set('temp2', this.temp2);
    }
}

app/controllers/decrement1.js

Javascript

import Ember from 'ember';

export default Ember.Controller.extend({
    value: 0,
    actions: {
        older() {
            this.incrementProperty('value');
        },
        younger() {
            this.decrementProperty('value');
        },

        addItem(data, data1, data2) {
            let temp = {
                food: data,
                quant: data1,
                isFruit: data2
            }
            this.food.addObject(temp)
        },
    },
});

app/templates/decrement1.hbs

Javascript

{{page-title "decreaseProperty"}}
<h3>List of Item in Buckets</h3>
<table>
    <tr>
        <th> Food Name </th>
        <th>Bucket </th>
        <th>Fruit </th>
      </tr>
      {{#each @model as |website|}}
    <tr>
        <td>{{website.food}}</td>
          <td>{{website.quant}}</td>
          <td>{{website.isFruit}}</td>
    </tr>
      {{/each}}
</table>
<br /><br />
<div>
    <label>Enter Item Name: </label>
      {{input value=this.temp2}}
</div>
<br />
<div>
    <label>Enter Quantity in Kg: </label>
      {{input value=this.value}}
</div>
<input type="button" id="increase" value="+"
    {{action "older"}} />
<input type="button" id="decrease" value="-"
    {{action "younger"}} />
<br />
<br />
<div>
    <label>Item is fruit or not : </label>
      {{input value=this.temp}}
</div>
<br /><br />
<input
    type="button"
      id="all-Fruits"
      value="Add item"
      {{action "addItem" this.temp2 this.value this.temp}}
/>
{{outlet}}

Output: Visit localhost:4200/decrement1 to view the output

Ember.js Ember.NativeArray decrementProperty Method

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

ember generate route decrement2

app/controllers/decrement2.js

Javascript

import Ember from 'ember';
import { decrementProperty }
    from '@ember/array';

export default Ember.Controller.extend({
    year: 2022,
    month: 9,
    date: 15,
    actions: {
        olderD() {
            this.incrementProperty('date');
        },
        youngerD() {
            this.decrementProperty('date');
        },
        olderY() {
            this.incrementProperty('year');
        },
        youngerY() {
            this.decrementProperty('year');
        },
        olderM() {
            this.incrementProperty('month');
        },
        youngerM() {
            this.decrementProperty('month');
        },
    },
});

app/templates/decrement2.hbs

Javascript

{{page-title "DecrementProperty"}}
<h1>Year {{this.year}}</h1>
<input type="button" id="increase"
    value="+" {{action "olderY"}} />
<input type="button" id="decrease"
    value="-" {{action "youngerY"}} />
<hr />
<h1>Month {{this.month}}</h1>
<input type="button" id="increase"
    value="+" {{action "olderM"}} />
<input type="button" id="decrease"
    value="-" {{action "youngerM"}} />
<hr />
<h1>Date {{this.date}}</h1>
<input type="button" id="increaseD"
    value="+" {{action "older"}} />
<input type="button" id="decrease"
    value="-" {{action "youngerD"}} />
{{outlet}}

Output: Visit localhost:4200/decrement2 to view the output

Ember.js Ember.NativeArray decrementProperty Method

Reference: https://api.emberjs.com/ember/4.4/classes/ArrayProxy/methods/decrementProperty?anchor=decrementProperty