angular *Ngif else用法详解

<div *ngIf="condition">...</div>
<!--Angular 2.x中使用template-->
<ng-template [ngIf]="condition"><div>...</div></ng-template> 

 <div *ngIf="condition; else elseBlock">...</div>
 <ng-template #elseBlock>...</ng-template>

 <div *ngIf="condition; then thenBlock else elseBlock"></div>
 <ng-template #thenBlock>...</ng-template>
 <ng-template #elseBlock>...</ng-template>

<tr *ngFor="let item of gridList">
 <td *ngIf="item.bol; else inputid">{{item.id}}</td>
 <ng-template #inputid>
  <td class="insert"><input type="text" [value]="item.id"></td>
 </ng-template>
 ...
</tr>