Angular 5 'inputClick' 已声明,但其值从未被读取
Angular 5 'inputClick' is declared but its value is never read
我是 angular 和前端编程的新手,如果这太简单了,我很抱歉。
我有一个 HTML
文件,看起来像这样
<input class="born-date-input" formControlName="dateOfBorn" minlength="1" maxlength="10" (click)="inputClick=true"/>
<div class="alert alert-warning" *ngIf="inputClick==true">
<small>show warning</small>
</div>
在我的组件 .ts 文件中有
export class MainInputFormComponent implements OnInit, DoCheck {
@Output('changeData') sendTheNewDataJSON = new EventEmitter<any>();
private inputClick: boolean = false;
}
在 HTML 文件中没有看到 inputClick
变量
如果将其声明为私有,则不会发生数据绑定。您需要将其声明为 public
才能使其可用。按照下面的代码:
export class MainInputFormComponent implements OnInit, DoCheck {
@Output('changeData') sendTheNewDataJSON = new EventEmitter<any>();
public inputClick: boolean = false;
}
然后你可以像这样在你的 HTML 中使用它。
<input class="born-date-input" formControlName="dateOfBorn" minlength="1" maxlength="10" (click)="inputClick=true"/>
<div class="alert alert-warning" *ngIf="inputClick">
<small>show warning</small>
</div>
将 'private' 更改为 'public' 或删除访问修饰符(默认为 public)
export class MainInputFormComponent implements OnInit, DoCheck {
@Output('changeData') sendTheNewDataJSON = new EventEmitter<any>();
inputClick: boolean = false;
}
您可以执行其中任一操作,因为当 inputClick 声明为私有时无法访问它
export class MainInputFormComponent implements OnInit, DoCheck {
@Output('changeData') sendTheNewDataJSON = new EventEmitter<any>();
inputClick: boolean = false;
}
或
export class MainInputFormComponent implements OnInit, DoCheck {
@Output('changeData') sendTheNewDataJSON = new EventEmitter<any>();
public inputClick: boolean = false;
}
我是 angular 和前端编程的新手,如果这太简单了,我很抱歉。
我有一个 HTML
文件,看起来像这样
<input class="born-date-input" formControlName="dateOfBorn" minlength="1" maxlength="10" (click)="inputClick=true"/>
<div class="alert alert-warning" *ngIf="inputClick==true">
<small>show warning</small>
</div>
在我的组件 .ts 文件中有
export class MainInputFormComponent implements OnInit, DoCheck {
@Output('changeData') sendTheNewDataJSON = new EventEmitter<any>();
private inputClick: boolean = false;
}
在 HTML 文件中没有看到 inputClick
变量
如果将其声明为私有,则不会发生数据绑定。您需要将其声明为 public
才能使其可用。按照下面的代码:
export class MainInputFormComponent implements OnInit, DoCheck {
@Output('changeData') sendTheNewDataJSON = new EventEmitter<any>();
public inputClick: boolean = false;
}
然后你可以像这样在你的 HTML 中使用它。
<input class="born-date-input" formControlName="dateOfBorn" minlength="1" maxlength="10" (click)="inputClick=true"/>
<div class="alert alert-warning" *ngIf="inputClick">
<small>show warning</small>
</div>
将 'private' 更改为 'public' 或删除访问修饰符(默认为 public)
export class MainInputFormComponent implements OnInit, DoCheck {
@Output('changeData') sendTheNewDataJSON = new EventEmitter<any>();
inputClick: boolean = false;
}
您可以执行其中任一操作,因为当 inputClick 声明为私有时无法访问它
export class MainInputFormComponent implements OnInit, DoCheck {
@Output('changeData') sendTheNewDataJSON = new EventEmitter<any>();
inputClick: boolean = false;
}
或
export class MainInputFormComponent implements OnInit, DoCheck {
@Output('changeData') sendTheNewDataJSON = new EventEmitter<any>();
public inputClick: boolean = false;
}