Ember.js ArrayProxy includes() 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 includes() method is used to determine if the array contains the passed object.

Syntax:

includes( object, startAt );

Parameters:

• object: It is the object which presence we are checking in the array.
• startAt: It is the location from which we search for the object.

Return Value: true if the object is found in the array.

Steps to Install and Run Ember.js:

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 include1

app/routes/include1.js

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

export default class ListRoute extends Route {
    list = [1, 2, 3, 5, 6, 7, 8, 9];
    item;
    idx;
    model() {
        return this.list;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('list', this.list);
        controller.set('item', this.item);
        controller.set('idx', this.idx);
    }
}

app/controllers/include1.js

import Ember from 'ember';
import { clear, insertAt, indexOf, lastIndexOf, includes }
    from '@ember/array';

export default Ember.Controller.extend({
    actions: {
        insertItem(item) {
            this.list.addObject(item);
        },
        clearList() {
            this.list.clear();
        },
        contains(item) {
            let res = this.list.includes(item);
            alert(`The list ${res ? '' : 'does not'}
            contains ${item}`);
        },
    },
});

app/templates/include1.hbs

{{page-title "include"}}
<h3>Here is a list of Items: </h3>
<ul>
    {{#each @model as |i|}}
        <li>{{i}}</li>
    {{/each}}
</ul>
<br/>
<div>
    <label>Enter Item: </label>
    {{input value=this.item2}}
</div>
<div>
    <input
        type="button"
        id="contains-item"
        value="Contains?"
        {{action "contains" this.item}}
    />
</div>
<br />
<div>
    <label>Enter Item: </label>
    {{input value=this.item}}
</div>
<div>
    <input
        type="button"
        id="insert-item"
        value="Insert Item"
        {{action "insertItem" this.item }}
    />
</div>
<br />
<input type="button" id="clear-items" value="Clear"
    {{action "clearList"}} />
{{outlet}}

Output: Visit localhost:4200/include1 to view the output

Ember.js ArrayProxy include method

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

ember generate route include2

app/routes/include.js

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

export default class PartyRoute extends Route {
    partyItems = [
        'Oxygen',
        'Source Code',
        'Infine',
        'Tenet',
        'SpiderHead',
        'The Thing',
        'A Quiet Place',
        'The Invisible Man',
        'Looper',
        'Ad Astra'
    ];
  temp = [
        'Shutter Island',
        'Matrix',
        'Avatar',
        'Fantastic Beast',
        'Avengers',
        'Fantastic four',
        'Hult',
        'Superman',
        'Spiderman',
        'The Batman'
    ];
    item;
    idx;
    model() {
        return this.partyItems;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('partyItems', this.partyItems);
        controller.set('item', this.item);
        controller.set('idx', this.idx);
    controller.set('temp', this.temp);
    }
}

app/controllers/include2.js

import Ember from 'ember';
import { insertAt, indexOf, lastIndexOf, includes }
    from '@ember/array';

export default Ember.Controller.extend({
    actions: {
        insertItem(item) {
            this.partyItems.pushObject( item);
        },
        push_item(data) {
            this.partyItems.pushObjects(data);
        },
        contains(item) {
            let res = this.partyItems.includes(item);
            alert(`The partyItems ${res ? '' : 'does not'}
            contains ${item}`);
        },
    },
});

app/templates/include2.hbs

{{page-title "Party"}}
<h3>Here is a list of items: </h3>
<ul>
    {{#each @model as |party|}}
        <li>{{party}}</li>
    {{/each}}
</ul>
<br /><br />
<div>
    <label>Enter Item: </label>
    {{input value=this.item}}
</div>
<div>
    <input
        type="button"
        id="insert-item"
        value="Insert Item"
        {{action "insertItem" this.item}}
    />
</div>
<br />
<div>
    <label>Enter Item: </label>
    {{input value=this.item2}}
</div>
<div>
    <input
        type="button"
        id="contains-item"
        value="Contains?"
        {{action "contains" this.item2}}
    />
</div>
<br />
<input
        type="button"
        id="contains-item"
        value="Add Movies"
        {{action "push_item" this.temp}}
    />
{{outlet}}

Output: Visit localhost:4200/include2 to view the output

Ember.js ArrayProxy include method

Reference: https://api.emberjs.com/ember/2.14/classes/Ember.Array/methods/include?anchor=include