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Ember.js ArrayProxy replaceContent() Method

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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 replaceContent() Method of ArrayProxy is a method that is used to replace the specified objects on the content array. This method is only called if the content is not null. 

Syntax: 

this.object.repaceContent( idx, amt, objects );

 

Parameters: 

  • idx: It is the starting index from which content replacing starts. 
  • amt: It is the amount till where content will be replaced. 
  • objects: It is the object which is placed in place. 

Return type: The return type of this method is void.

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 temp1

app/routes/temp1.js

Javascript




import Route from '@ember/routing/route';
import { A } from '@ember/array';
import ArrayProxy from '@ember/array/proxy';
  
export default class List2Route extends Route {
    list = ArrayProxy.create({
        content: A([
            'Oxygen',
            'Source Code',
            'Infine',
            'Tenet',
            'SpiderHead',
            'The Thing',
            'A Quiet Place',
            'The Invisible Man',
            'Looper',
            'Ad Astra',
        ])
    });
    model() {
        return this.list;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('list', this.list);
    }
}


app/controllers/temp1.js

Javascript




import Controller from '@ember/controller';
import { action } from '@ember/object';
  
export default class List2Controller extends Controller {
  
    @action
    rotate(data) {
        let temp = this.list.content;
        this.list.replaceContent(0, temp.length, temp.reverse());
    }
  
}


app/templates/temp1.hbs

HTML




{{page-title "ArrayProxy"}}
<h3>Here is a list of Movies: </h3>
<table>
    {{#each @model as |item|}}
    <tr>
        <td>
            <li>{{item}}</li>
        </td>
    </tr>
    {{/each}}
</table>
<br />
  
<br />
<div>
    <input type="button" id="rotate-item" 
        value="Rotate the Array" {{action "rotate" }} />
</div>
{{outlet}}


Output:

replaceContent output1

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

ember generate route temp2

app/routes/temp2.js

Javascript




import Route from '@ember/routing/route';
import { A } from '@ember/array';
import ArrayProxy from '@ember/array/proxy';
  
export default class List2Route extends Route {
    list = ArrayProxy.create({
        content: A([
            'python',
            'javascript',
            'java',
            'Php',
            'Angular',
            'c++',
            'Django',
            'c',
        ])
    });
    model() {
        return this.list;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('list', this.list);
    }
}


app/controllers/temp2.js

Javascript




import Controller from '@ember/controller';
import { action } from '@ember/object';
  
export default class List2Controller extends Controller {
    list2 = [
        'SQL',
        'Go',
        'c#',
        'Kotlin',
        'R',
        'Swift',
        'Rust',
        'Ruby',
    ]
  
    @action
    show(data) {
  
        this.list.replaceContent(0, data, this.list2.slice(0, data));
    }
  
}


app/templates/temp2.hbs

HTML




{{page-title "ArrayProxy"}}
<h3>Here is a list of languages: </h3>
<table>
    {{#each @model as |item|}}
    <tr>
        <li>{{item}}</li>
    </tr>
    {{/each}}
</table>
<br />
<div>
    <label>Enter Index: </label>
    {{input value=this.item3}}
</div>
<br />
<div>
    <input type="button" id="change-item"
           value="Change till index" {{action "show" this.item3}} />
</div>
{{outlet}}


Output:

replaceContent output2

Reference: https://api.emberjs.com/ember/4.9/classes/ArrayProxy/methods/replaceContent?anchor=replaceContent



Last Updated : 05 Jan, 2023
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