- 首页
- 前端开发
- Angular 6 Reactive Forms:如何将焦点设置在第一个无效输入上
Angular 6 Reactive Forms:如何将焦点设置在第一个无效输入上
[英] Angular 6 Reactive Forms : How to set focus on first invalid input
本文介绍了Angular 6 Reactive Forms:如何将焦点设置在第一个无效输入上的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在我的 Angular 6 应用程序下，我使用的是 Reactive Forms.
我的目的是在提交时，我想在出错时将焦点设置在第一个无效输入上.
我的表单如下所示:
<div class="form-inline form-group"><label class="col-md-2 justify-content-start">基本代码<span class="startRequired mr-1">*</span><输入类型=文本"最大长度=100"formControlName="codeBasicat";class=col-md-3 表单控件"占位符=saisie obligatoire"[ngClass]="{'is-invalid': 已提交 &&formFiels.codeBasicat.errors }";/><div *ngIf="submitted &&formFiels.codeBasicat.errors"class="col invalid-feedback"><div class="text-left";*ngIf=formFiels.codeBasicat.errors.required">基本代码要求.
<div class="form-inline form-group"><label class="col-md-2 justify-content-start">申请名称<span class="startRequired mr-1">*</span><输入类型=文本"最大长度=100"formControlName=nomApplication"class=col-md-6 表单控件"占位符=saisie obligatoire"[ngClass]="{'is-invalid': 已提交 &&formFiels.nomApplication.errors }";/><div *ngIf="submitted &&formFiels.nomApplication.errors"class="col invalid-feedback"><div class="text-left";*ngIf=formFiels.nomApplication.errors.required">Nom de l'application est requis.
</表单>
在我的 TS 文件下，我的表单配置如下所示:
this.addItemfForm = this.formBuilder.group({libellePef: ['', Validators.required],codeBasicat: ['', Validators.required ],nomApplication: ['', Validators.required ],网址:['']，模式传输:['']，});
我尝试了 autofocus 指令，但没有用
建议?
解决方案
在提交中使用以下代码.
for (Object.keys(this.addressForm.controls) 的常量键) {如果(this.addressForm.controls[key].invalid){const invalidControl = this.el.nativeElement.querySelector('[formcontrolname="' + key + '"]');invalidControl.focus();休息;}}
this.addressForm 将是您的 FormGroup.
我们在这里甚至不需要指令.
Under my Angular 6 app , i'm using Reactive Forms .
My purpose is when submitting , i want to set focus on first invalid input when error.
My form looks like this :
<form [formGroup]="addItemfForm " (ngSubmit)="onSubmitForm()">
<div class="form-inline form-group">
<label class="col-md-2 justify-content-start">
Libellé du pef
<span class="startRequired mr-1"> *</span>
</label>
<input type="text" maxlength="100" formControlName="libellePef" class="col-md-6 form-control" placeholder="saisie obligatoire" [ngClass]="{ 'is-invalid': submitted && formFiels.libellePef.errors }" />
<div *ngIf="submitted && formFiels.libellePef.errors" class="col invalid-feedback">
<div class="col text-left" *ngIf="formFiels.libellePef.errors.required">Libellé du pef est requis.</div>
</div>
</div>
<div class="form-inline form-group">
<label class="col-md-2 justify-content-start">
Code Basicat
<span class="startRequired mr-1"> *</span>
</label>
<input type="text" maxlength="100" formControlName="codeBasicat" class="col-md-3 form-control" placeholder="saisie obligatoire" [ngClass]="{ 'is-invalid': submitted && formFiels.codeBasicat.errors }" />
<div *ngIf="submitted && formFiels.codeBasicat.errors" class="col invalid-feedback">
<div class="text-left" *ngIf="formFiels.codeBasicat.errors.required">Code Basicat est requis.</div>
</div>
</div>
<div class="form-inline form-group">
<label class="col-md-2 justify-content-start">
Nom de l'application
<span class="startRequired mr-1"> *</span>
</label>
<input type="text" maxlength="100" formControlName="nomApplication" class="col-md-6 form-control" placeholder="saisie obligatoire" [ngClass]="{ 'is-invalid': submitted && formFiels.nomApplication.errors }" />
<div *ngIf="submitted && formFiels.nomApplication.errors" class="col invalid-feedback">
<div class="text-left" *ngIf="formFiels.nomApplication.errors.required">Nom de l'application est requis.
</div>
</div>
</div>
</form>
Under my TS file , my form config looks like this :
this.addItemfForm = this.formBuilder.group({
libellePef: ['', Validators.required],
codeBasicat: ['', Validators.required ],
nomApplication: ['', Validators.required ],
urlCible: [''],
modeTransfert: [''],
});
I've tried the autofocus directive but that didn't work
Suggestions?
解决方案
Use below code in your submit.
for (const key of Object.keys(this.addressForm.controls)) {
if (this.addressForm.controls[key].invalid) {
const invalidControl = this.el.nativeElement.querySelector('[formcontrolname="' + key + '"]');
invalidControl.focus();
break;
}
}
this.addressForm will be your FormGroup.
We don't even need directive here.
这篇关于Angular 6 Reactive Forms:如何将焦点设置在第一个无效输入上的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
