给占位符选择Angular 6
发布时间:2020-12-17 17:47:33 所属栏目:安全 来源:网络整理
导读:我有一个选择选项,我想给占位符说“选择一个类别” form role="form" class="form form-horizontal" (ngSubmit)="onSubmit()" #form="ngForm" ngNativeValidate div class="form-group row" div class="col-xl-4 col-lg-6 col-md-12" fieldset class="form-g
我有一个选择选项,我想给占位符说“选择一个类别”
<form role="form" class="form form-horizontal" (ngSubmit)="onSubmit()" #form="ngForm" ngNativeValidate> <div class="form-group row"> <div class="col-xl-4 col-lg-6 col-md-12"> <fieldset class="form-group"> <label for="customSelect">Categories:</label> <select class="custom-select d-block w-100" id="Category" [(ngModel)]="Category" name="Category" required> <option value=" ">Select one category </option> <option *ngFor="let item of myBusinessList" [value]="item.id">{{item.name}}</option> </select> </fieldset> </div> </div> <button type="submit" class="btn btn-raised btn-danger">Save</button> </form> 如果我删除[ngModel]然后它的工作原理.如果我写 <option value="undefined" selected>Select one category </option> 然后它认为是价值之一.我必须确保有位置,并且还需要选择其中一个值 解决方法
您可以使用[value] =“”选择隐藏
我在Stackblitz上创建了一个demo <form role="form" class="form form-horizontal" (ngSubmit)="onSubmit()" #form="ngForm" ngNativeValidate> <div class="form-group row"> <div class="col-xl-4 col-lg-6 col-md-12"> <fieldset class="form-group"> <label for="customSelect">Categories:</label> <select class="custom-select d-block w-100" id="Category" [(ngModel)]="Category" name="Category" required placeholder="d.ff"> <option hidden [value]="" selected>Select one category </option> <option *ngFor="let item of myBusinessList" [value]="item.id">{{item.name}}</option> </select> </fieldset> </div> </div> <button type="submit" class="btn btn-raised btn-danger">Save</button> </form> (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |