我有2个选择:
<form name="newDocumentForm">
<label for="companySelect"> Company: </label>
<select name="companySelect" id="companySelect" [(ngModel)]="companySelect"
(ngModelChange)="onChange($event)">
<option [ngValue]="undefined" disabled selected>Select...</option>
<option *ngFor="let company of companies" [ngValue]="company">{{company.name}}</option>
</select>
<label for="documentTypeSelect"> Type: </label>
<select name="documentTypeSelect" id="documentTypeSelect"
[(ngModel)]="documentTypeSelect">
<option [ngValue]="undefined" disabled selected>Select...</option>
<option value="aaa">ty</option>
<option value="bbbb">ew</option>
</select>
</form>
每当我在第一个选择中更改某些内容时,我应该在onChange($ event)中添加什么来将documentTypeSelect选项设置为“Select ...”?像this.documentTypeSelect = ???
1 回答
更改
至
如果您将
companySelect
设置为''
,则将选择此选项有关更复杂的方案,另请参阅Angular 2 Dropdown Options Default Value