What is the best way to send the index value from a ngFor loop to the component?

I am facing an issue with my code where I have an ngFor loop. Within this loop, there is a div element and I need to pass the index value to the TypeScript file when this div is clicked.

As I am new to Angular 2, any guidance on how to achieve this would be greatly appreciated.

Example:

<div *ngFor="let y of characters; let i = index">
    <div (click)="passIndexValue(i)">
    </div>
<div>

Answer №1

<div *ngFor="let y of characters;let i = index">
    <div (click)="passIndexValue(i)">
    </div>
<div>`

passIndexValue(index){
   console.log(index);//clicked index
}

You can also pass the value to the component like this (assuming the use of @Input below)

<div *ngFor="let y of characters;let i = index">
    <childComponent [index]="i">
    </childComponent>
<div>`

Then retrieve the value on the component object:

@Input() index: number;

And directly use it in the template of the child component as follows:

<div id="mydivinstance_{{index}}"></div>

This allows a component to have a unique ID based on the *ngFor loop.

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