Ember.js MutableArray pushObject() 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 pushObject() method is used to push object into an array.

Syntax:

pushObject(obj)

Parameters:

• obj (Object): Object to push

Returns: Object that was passed as a parameter

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

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 notepad

app/routes/notepad.js

Javascript

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

export default class NotepadRoute extends Route {
    item;
    items = ['Bread', 'Facewash'];
    model() {
        return this.items;
    }
    setupController(controller, model) {
        this._super(controller, model);
        controller.set('items', this.items);
    }
}

app/controllers/notepad.js

Javascript

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

export default Ember.Controller.extend({
    actions: {
        addItem(item) {
            console.log(item);
            this.items.pushObject(item);
        }
    }
})

app/template/notepad.hbs

HTML

{{page-title "Notepad"}}

<h2>Your Items</h2>

<div>
    <label>Enter Item: </label>
    {{input value=this.item}}
</div>
<div>
    <input type="button" id="add-item"
        value="Add Item" {{action 'addItem' this.item}}/>
</div>
<br/><br/>

<ul>
    {{#each @model as |i|}}
    <li>{{i}}</li>
    {{/each}}
</ul>

{{outlet}}

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

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

ember generate route languages

app/routes/languages.js

Javascript

import Route from '@ember/routing/route';
import { classify, w } from '@ember/string';
import { pushObject } from '@ember/array';

export default class LanguagesRoute extends Route {
    name = `mandarin_Chinese spanish english
        Hindi bengali Portuguese russian
        japanese western_punjabi yueChinese`;

    num = `929.0 474.7 372.9 343.9 233.7
        232.4 154.0 125.3 92.7 85.2`
    languages = [];
    initLanguages() {
        this.languages = [];
        this.name = w(this.name);
        this.num = w(this.num)
        for(let i = 0; i<this.name.length; i++) {
            let obj = new Object();
            obj['name'] = classify(this.name[i]);
            obj['num'] = this.num[i];
            this.languages.pushObject(obj);
        }
    }
    model() {
        this.initLanguages();
        return this.languages;
    }
}

app/template/languages.hbs

Javascript

{{page-title "Languages"}}

<h2>Most Spoken Languages in the World</h2>

<table style="border: 2px solid black;padding: 30px;">
    <tr>
        <th>Language</th>
        <th>Native Speakers (millions)</th>
    </tr>
    {{#each @model as |language|}}
    <tr>
        <td>{{language.name}}</td>
        <td>{{language.num}}</td>
    </tr>
    {{/each}}
</table>

{{outlet}}

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

Reference: https://api.emberjs.com/ember/4.4/classes/MutableArray/methods