add grepper extension code example
Example 1: grepper chrome extension
Install grepper at: https://chrome.google.com/webstore/detail/grepper/amaaokahonnfjjemodnpmeenfpnnbkco
Example 2: add grepper
Ng If and Ng For use together for Ion Select
<ion-item>
<ion-label>Member Name 会员名字</ion-label>
<ion-select [(ngModel)]="invoice.membername" placeholder="Select One">
<ng-container *ngFor="let c of members">
<ion-select-option *ngIf="c.by == userid" [value]="c.name">
{{ c.name }}
</ion-select-option>
</ng-container>
</ion-select>
</ion-item>