Shifting input and output elements from HTML to Typescript within an Angular framework

Is there a way to transfer all the Inputs and Outputs of a Parent Component into Typescript instead of HTML?

I need to work with a Parent Component that has many parameters for sending and receiving data to a Child Component. I want to convert them to Typescript. How can I do this? 

<app-address-type-dropdown class="addresstype" (addressTypeChange)="addressTypeChangeEvent($event)"
    [addressTypeDefaultItem]="addressEntryConfig.addressTypeDefaultValue"
    [selectedAddressType]="addressEntryConfig.selectedAddressType"
    [valuesToExclude]="addressEntryConfig.addressTypeDropdownListExclusion">
</app-address-type-dropdown>

Objective:

<app-address-type-dropdown> </app-address-type-dropdown>
<!-- With input and output parameters in the Typescript file -->
  • The main goal is to streamline the process of rearranging html/css without having to manually copy inputs/outputs.

If services are used, will it result in strongly typed components where the parent and child are overly connected? Is it possible to implement a smart-dumb architecture strategy using services or not?

angulartypescriptangular8

Answer №1

To access the child component, utilize @ViewChild and configure input properties and event subscriptions within the parent component's code:

@ViewChild(AddressTypeDropdownComponent, { static: false }) child: AddressTypeDropdownComponent;

ngAfterViewInit() {
  // Subscribe to events from the child component
  this.child.addressTypeChange.subscribe(value => {
    console.log(value);
  });
}

someMethod() {
  // Update input values in the child component
  this.child.addressTypeDefaultItem = someValue1;
  this.child.selectedAddressType = someValue2;
}

For a demonstration, view it on this stackblitz.

Answer №2

@Input - Implement a shared service to retrieve data within the child element.

@Output - Utilize subjects to monitor any updates in the child component.

Answer №3

One way to achieve this is by utilizing a service. Within the service, you have the option to create either a Subject or BehaviorSubject. This allows for seamless communication between parent and child components - any new data emitted in the parent can be easily accessed in the child component through subscription to the Subject.

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