Angular component can receive object key-value pairs as separate arguments

Let's say I am working with a component that requires three separate inputs, named input1, input2, and input3.

export class exampleComponent {
  @Input() input1:string;
  @Input() input2:string;
  @Input() input3:string;
  ....
  ...
}

In the parent component, there is an object structured as follows:

args = {
    input1: "string1",
    input2: "string2",
    input3: "string3"
}

What would be the most effective approach to passing these key-value pairs from the object as arguments to the exampleComponent? It should be noted that not all inputs are required in exampleComponent, and the args object may not always contain all three values.

I am looking for suggestions on how to achieve this without directly passing the entire object as an input to the testComponent. Your insights are greatly appreciated. Thank you.

Answer №1

In order to achieve this, you will need to perform the task manually due to a limitation in Angular. For example, we are unable to de-structure the object (...args) within the HTML tag. Instead, the child component must read the values similar to how React operates!

<app-test [input1]="args?.input1" [input2]="args?.input2" [input3]="args?.input3"/>

Answer №2

In Naren Murali's response, the use of conditional chaining is deemed unnecessary as arguments are always present. The correct implementation should look like this:

Parent component

<app-test 
  [input1]="args.input1" 
  [input2]="args.input2" 
  [input3]="args.input3"
></app-test>

Child component

export class testComponent {
  @Input() input1: string | undefined;
  @Input() input2: string | undefined;
  @Input() input3: string | undefined;
}

To ensure that the inputs are of type string, it is recommended to specify default values like so:

Child component

export class testComponent {
  @Input() input1 = '';
  @Input() input2 = '';
  @Input() input3 = '';
}

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