"ngForTrackByKey" directive

app.component.html

<div
    *ngFor="let item of items; trackByKey: 'id'"
>
    {{item.name}}
</div>

track-by-key.directive.ts

import {Directive, Host, Input} from '@angular/core';
import {NgForOf} from '@angular/common';

@Directive({
    selector: '[ngForTrackByKey]',
    standalone: true
})
export class TrackByKeyDirective<T> {

    @Input('ngForTrackByKey')
    key: string;

    constructor(
        @Host()
        private ngFor: NgForOf<T>
    ) {
        this.ngFor.ngForTrackBy = (index: number, item: T) => item[this.key];
    }

}