How to Set Default Value In Ember.js?

3 minutes read

In Ember.js, you can set default values for properties in a component or controller by defining them in the object's class definition. This can be done by using the init() method to set the default values for the properties. For example, you can define default values for properties like this:

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import Component from '@ember/component';

export default Component.extend({
  tagName: 'div',
  classNames: ['my-component'],
  text: 'Hello, World!',

  init() {
    this._super(...arguments);
    this.set('text', 'Default Text');
  }
});


In this example, the text property is set to "Hello, World!" by default, but in the init() method, we override this default value with the value "Default Text". This way, whenever an instance of this component is created, the text property will be set to the default value of "Default Text".


By using the init() method, you can easily set default values for properties in your Ember.js components or controllers.


How to set default value in ember.js for email inputs?

In Ember.js, you can set a default value for email inputs by using the value attribute in the template file. Here's an example of how to set a default value for an email input in Ember.js:

  1. In your template file (e.g., app/templates/components/my-component.hbs), add an email input field and set the default value using the value attribute:
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<input type="email" value={{defaultValue}}>


  1. In your component's JavaScript file (e.g., app/components/my-component.js), define the defaultValue property with the default value you want to set:
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import Component from '@glimmer/component';

export default class MyComponent extends Component {
  defaultValue = 'example@example.com';
}


With this setup, the email input field in your Ember.js application will have a default value of example@example.com when it is rendered. You can change the default value in the defaultValue property as needed.


How to set default value in ember.js for textareas?

In Ember.js, you can set default values for textareas by using the value property in the template. Here's an example of how you can set a default value for a textarea in an Ember.js template:

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<textarea value={{myDefaultValue}}></textarea>


In this example, myDefaultValue is a property on the component or controller that contains the default value you want to set for the textarea. You can set this property in the component or controller's JavaScript file:

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import Component from '@ember/component';

export default Component.extend({
  myDefaultValue: 'This is the default value for the textarea'
});


With this setup, the textarea will display the default value specified in myDefaultValue when the component or controller is rendered.


How to set default value in ember.js for input fields using an initializer?

To set a default value for input fields in Ember.js using an initializer, you can create an initializer that sets the initial value for the input fields. Here's an example of how you can do this:

  1. Create an initializer in your Ember app:
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// app/initializers/default-input-values.js

export function initialize(application) {
  application.inject('controller', 'defaultInputValues', 'service:default-input-values');
}

export default {
  initialize
};


  1. Create a service to store the default input values:
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// app/services/default-input-values.js

import Service from '@ember/service';

export default Service.extend({
  defaultValue: 'Default Value'
});


  1. Inject the default-input-values service into your controller or component:
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// app/controllers/my-controller.js

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

export default Controller.extend({
  defaultInputValues: service()
});


  1. Use the defaultValue property from the defaultInputValues service in your template:
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<!-- app/templates/my-template.hbs -->

<input type="text" value={{this.defaultInputValues.defaultValue}}>


Now, the input field in your template will have the default value 'Default Value' set by the default-input-values service. You can change the default value by updating the defaultValue property in the service.

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