*ngIf

If employee.id is not there, then don’t render id div.

my-first-component.component.html

<div *ngFor = "let employee of employee1">
<div *ngIf="employee.id">
 {{employee.id}} <br/>
</div>
 {{employee.name}} 
<hr/>
</div>

my-first-component.component.ts

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

@Component({
	selector: 'app-my-first-component',
	templateUrl: './my-first-component.component.html',
	styleUrls: ['./my-first-component.component.css']
})

export class MyFirstComponentComponent implements OnInit {

	constructor() { }

	ngOnInit() {
	}
	
	employee1=[{
		name:'Akshay Patel'
	},
	{
		id:2,
		name:'Panth Patel'
	}]
}