Component html element in Angular not being updated by service

Within my Angular service, I have a property linked to a text field in a component's HTML.

Oddly, when this property is updated by the service, the new value doesn't reflect in the HTML element unless the element is clicked on.

I'm perplexed as to why the updated value isn't immediately displayed without requiring manual interaction with the element.

Even though the console log within the update function confirms that the object is being updated correctly, the data still doesn't populate in the form field until it's clicked on.

Here's the relevant code:

In parent.component.html

<input [(ngModel)]="service.serviceObj.data" type="text" />

In service.service.ts

public serviceObj = {} as any;

...

updateObj() {
    this.serviceObj.data = 'new value';
    console.log('this.serviceObj = ', this.serviceObj);
}

...

Answer №1

Your code is making reference to:

service.selectedMarker.data

However, you are actually setting:

this.serviceObj.data = 'new value'

serviceObj as opposed to selectedMarker. Was this intentional?

<input [(ngModel)]="service.serviceObj.data" type="text" />

Answer №2

If you want to duplicate the object, you can do so by following this method:

 const duplicatedObj= JSON.parse(JSON.stringify(<originalObj>));

After duplicating the object, you can make any changes to the duplicated object and assign it back to the original object ("this.originalObj = duplicatedObj")

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