Using ngIf without an extra element in Angular 2
ng-container is preferred over template:
<ng-container *ngIf="expression">See:
I found a method for that on: https://angular.io/docs/ts/latest/guide/template-syntax.html#!#star-template.
You can simply use the <template> tag and replace *ngIf with [ngIf] like this.
<template [ngIf]="..."> ...</template>
You can't put div directly inside tr, that would make invalid HTML. tr can only have td/th/table element in it & inside them you could have other HTML elements.
You could slightly change your HTML to have *ngFor over tbody & have ngIf over tr itself like below.
<tbody *ngFor="..."> <tr *ngIf="..."> ... </tr> <tr *ngIf="!..."> ... </tr> ..</tbody>