Ember.js Transition data Property

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 data property of the Transition object is used for passing data between routes or components during the transition. 

Transition.data ;

Parameters: It doesn’t take any parameters.

Return: It returns the defined object. 

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

Step 3: To start the server, type:

ember serve

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

ember generate route file1

app/routes/file1.js

Javascript

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

export default class MyRoute extends Route {
    k = null;
    beforeModel(transition) {
        // Set a data property on the transition object
        transition.data['myData'] = { foo: 'bar' };
    }

    afterModel(model, transition) {
        // Get the data property from the transition object
        let myData = transition.data['myData'];
        // Outputs {foo: 'bar'}
        console.log('Transition data : ', myData);
    }
}

app/templates/file1.hbs

HTML

{{page-title "Transition"}}

<h1>Welcome to the File Route</h1>

{{outlet}}

Output:

output1

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

ember generate route my-route

app/routes/my-route.js

Javascript

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

export default class MyRoute extends Route {
    beforeModel(transition) {
        transition.data['myData'] = 'Hello, world!';
    }
}

app/routes/other-routes.js

Javascript

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

export default class AboutRoute extends Route {
    afterModel(model, transition) {
        console.log(transition.data['myData']);
    }
}

app/controllers/my-route.js

Javascript

import Controller from '@ember/controller';
import { inject as service } from '@ember/service';
import { action } from '@ember/object';

export default class MyController extends Controller {
    @service router;

    @action
    GoTo() {
        let transition = this.router.transitionTo('other-route');
        transition.data['myData'] = { foo: 'bar' };
    }
}

app/templates/my-route.hbs

HTML

{{page-title "MyRoute"}}
<h1>Welcome to the My Route</h1>
<input
    type="button"
    id="R-item"
    value="Go to Other-Route"
    {{action "GoTo"}}
/>
{{outlet}}

Output:

output2

Reference: https://api.emberjs.com/ember/4.9/classes/Transition/properties/data?anchor=data