基于 for 循环中的条件的 Mat-icon 显示

Question

I have an angular-django app which makes an aPI call to a third-party application and returns json response. I am looping through the response and displaying the data in a table.

<tr *ngFor="let item of job_list">
     
      <td style="text-align:center">{{item?.ReleaseName}}</td>
      <td style="text-align:center">{{item?.Source}}</td>
      <td style="text-align:center"><mat-icon *ngIf="Successful" style="color:green;">check circle icon</mat-icon>
                                    <mat-icon *ngIf="Faulted" style="color: red;">error icon</mat-icon> 
                                    <mat-icon *ngIf="Stopped" style="color: grey;">cancel icon</mat-icon>
                                    {{item?.State}}
                                  
                                  
      </td>
      <td style="text-align:center">{{item?.StartTime | date:'dd-MM-yyyy         HH:mm:ss'}}</td>
      <td style="text-align:center">{{item?.EndTime | date:'dd-MM-yyyy           HH:mm:ss'}}</td>

     
     </tr>

Here, I want to display mat-icon based on {{item?.State}} value. For example if the value is Successful, I want to display the "check circle icon", if it's "Faulted", I want to display "error icon" etc. Is this possible?

Update: Implemented ngIf but alignment is out of order:

Thank you

Answer 1

1. You can try ngSwitch solution but ngIf also works:

<td style="text-align:center">
    <mat-icon *ngIf="item?.State === 'Successful'" style="color:green;">check circle icon</mat-icon>
    <mat-icon *ngIf="item?.State === 'Faulted'" style="color: red;">error icon</mat-icon> 
    <mat-icon *ngIf="item?.State === 'Stopped'" style="color: grey;">cancel icon</mat-icon>
    {{item?.State}}                                                               
</td>

2. Or even make it dinamically with a custom method that returns the icon:

.html:

<td style="text-align:center">
    <mat-icon [class]="getIconByItemState(item, true)">{{ getIconByItemState(item) }}</mat-icon>
    {{item?.State}}                                                               
</td>

.ts:

getIconByItemState(item, color: boolean = false): string {
   switch(item?.State) { 
      case 'Successful': { 
         return !color ? 'check circle icon' : 'green-icon'; 
      } 
      case 'Faulted': { 
          return !color ? 'error icon' : 'red-icon'; 
      }
      case 'Stopped': { 
          return !color ? 'cancel icon' : 'grey-icon'; 
      } 
      default: { 
         return 'default icon'; // ? 
      } 
   }
}

1. The best solution (if possible) is to make State variable name equals to icon name:

<td style="text-align:center">
    <mat-icon [class]="item?.State + '-color'">{{ item?.State }}</mat-icon>
    {{item?.State}}                                                               
</td>

Answer 2

 <td style="text-align:center" [ngSwitch]="item.State">
            <mat-icon **ngSwitchCase="Successful" style="color:green;">check circle icon</mat-icon>
            <mat-icon **ngSwitchCase="Faulted" style="color: red;">error icon</mat-icon> 
           <mat-icon **ngSwitchCase="Stopped" style="color: grey;">cancel icon</mat-icon>
                                                {{item?.State}}
 </td>