Ember.js Ember.Templates.helpers each-in() 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 each-in() method is used to loop over properties on an object. 

Syntax:

{{#each-in object as | key value | }}

Parameters:

• object: It is an object on whose property each will loop.
• key: It is an alias for the key of property. 
• value: It is an alias for the value of the property. 

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 server

Example 1: Type the following code to generate the route for this example:

ember generate route each1

app/components/compact2.js

Javascript

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';

export default class extends Component {
    food = [{
        "food": "Banana",
        "Quant": 5
    },
    {
        "food": "Pine-apple",
        "Quant": 2
    },
    {
        "food": "Apple",
        "Quant": 7
    },
    {
        "food": "Mango",
        "Quant": 4
    }];
}

app/components/compact2.hbs

HTML

{ { yield } }
{ { #each this.food as | item |} }
<div>
    <ul>
        {{ #each-in item as | key value|}}
            <li>{{ key }} : {{ value }}</li>
        {{/ each -in}}

    </ul>
</div>
{ { /each}}

app/templates/each1.hbs

Javascript

<Compact2 >
    <h1>
        List of Foods:
    </h1>
</Compact2>
{{outlet}}

Output:

Ember.js Ember.Templates.helpers each-in() Method

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

ember generate route each2

app/components/compact.js

Javascript

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';

export default class extends Component {
    student = [{
        "name": "Sam Snehil",
        "age": 21
    },
    {
        "name": "Satyam Sahu",
        "age": 23
    },
    {
        "name": "Sohan Argrwal",
        "age": 25
    },
    {
        "name": "Sreya Sarma",
        "age": 19
    }];
}

app/components/compact.hbs

HTML

{{yield}}
<ul>
    {{#each this.student as |item|}}
          <div>
              {{#each-in item as |key value |}}
                <li>{{key}}: {{value}}</li>
              {{/each-in}}
          </div>
          <br/>
      {{/each}}
</ul>

app/templates/each2.hbs

HTML

<Compact>
    <h1>
    List of Student :
    </h1>
</Compact>
{{outlet}}

Output:

Ember.js Ember.Templates.helpers each-in() Method

Reference: https://api.emberjs.com/ember/4.4/classes/Ember.Templates.helpers/methods/debugger?anchor=each-in