是否有可能在http错误响应后将mat-input设置为错误状态?从下面的代码提交表单后,即时消息发送了一个http请求,我想显示mat-error,但仅在输入处于错误状态并且错误响应后我不知道如何将其设置为“ manualy”时显示>
<form [formGroup]="exampleForm" (ngSubmit)="onSubmit()">
<mat-form-field>
<input matInput placeholder="placeholder" formControlName="Input" required>
<mat-error *ngIf="variable">error message</mat-error>
</mat-form-field>
</form>
答案 0 :(得分:0)
serviceClass:
export class serviceClass{
private url: string = 'your url'// your http request url
constructor(private http: HttpClient) { }
callApi() {
return this.http.get(this.url);
}
}
componentClass:在订阅http请求(如果您收到响应错误)时可以将errorVariable
设置为true。
export class componentClass{
private url: string = 'your url'
public errorVariable:boolean;
constructor(private service: serviceClass) { }
getApi() {
return this.service.callApi().subscribe(
(response:string)=>{
console.log(response);
},
(error)=>{
console.error(error);
this.errorVariable=true;
}
);
}
}
html模板:
<mat-error *ngIf="errorVariable">error message</mat-error>