Guide on sending information from a parent component to a child component in Angular using an event system

Is it possible to pass data from a parent component to a child component in Angular using a tab group?

<mat-tab-group>
    <mat-tab label="Some text0">
        <app-comp></app-comp1>
    </mat-tab>
    <mat-tab label="Some text">
        <app-comp1 [param1]="var1"></app-comp1>
    </mat-tab>
</mat-tab-group>

Initially, the param1 variable gets the correct data when the components are loaded. However, when I edit the value of var1 in the parent component (the one that handles everything), the param1 variable does not refresh its value in "app-comp1".

export class Component1 implements OnInit {

    @Input() var1             : any;

Is there a way to achieve this?

angularinputcomponents

Answer №1

When creating an input property called var1 in your child component and using param1 as the name, it will not function correctly.

It is crucial that the name of the @Input property defined in the Child Component matches the name of the attribute to which you are binding in the Parent Component Template.

Make this adjustment:

@Input() param1: any;

OR

Alternatively, modify this:

<app-comp1 [param1]="var1"></app-comp1>

To

<app-comp1 [var1]="var1"></app-comp1>

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