如何在失去焦点时将 angular 4 上的输入文本值格式化为货币?

How to format input text value to currency on angular 4 on lost focus?

我想在失去焦点后将输入文本的值格式化为货币。我怎样才能在 angular4 中实现它?

<input type="text" name="txtamount" [(ngModel)]="amount" />

如有任何建议,我们将不胜感激。谢谢!

(blur) 上使用 CurrencyPipe 转换。

 <input type="text" name="txtamount" [(ngModel)]="amount" 
        (blur)="transformAmount($event)" [(value)]="formattedAmount"/> 
 <br/>
 <br/>
 <div>
    Formatted Amount on loosing focus: {{ formattedAmount }}
 </div>
 <br/>
 <div>
     Formatted Amount inline with Pipe: {{ amount | currency:'USD'  }}
 </div>

并在您的 .ts 代码中,

transformAmount(element: HtmlElement){
    this.formattedAmount = this.currencyPipe.transform(this.amount, 'USD');
    // Remove or comment this line if you dont want 
    // to show the formatted amount in the textbox.
    element.target.value = this.formattedAmount;
}

您需要从 '@angular/common' 导入 CurrencyPipe 并将其添加到 App providers: [ ... ] 中。


演示 StackBlitz