Question:

How to Focus shifting between array of standard <input> controls?

Query: Focus shifting between array of standard controls after each key stroke

Solution

Use trackBy to solve this issue. This >link will help you understand the code better:

import { Component } from '@angular/core';

@Component({

selector: 'my-app',

templateUrl: './app.component.html',

styleUrls: ['./app.component.css']

})

export class AppComponent {

myData = [

[1,1,1,1],

[1,1,1,1]

];

trackByFn(index, item ) {

return( index );

}

.title {

font-family: sans-serif;

}

Array:

{{ myData | json }}

Why you should use trackBy?

By default, Angular uses object references to track items within a collection. Even though the objects in the new collection are just copies of the old ones, Angular is unable to maintain track of items in the collection when it is replaced with a new collection that does not maintain the same objects by reference.

Unless trackBy gives each element in *ng a unique idAngular will not be aware of the items that have been added, subtracted, or altered in the new collection during the iteration.

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