angular - 在Angular 4中单击取消时删除加载器

Question

我有一个名为 ngx-loading 的 npm 包。我必须设置 this.loading = true 和 this.loading = false 让它显示而不显示。当我在 javascript 中使用警报时，问题就来了。警报显示“ok”和“cancel”。当我点击“确定”时，加载器消失了，而如果我点击“取消”和“x”，它仍然出现？当我单击取消或 x 按钮时，如何使加载程序消失？这是我在下面所做的。

TS

onUpdate(form: NgForm) {
  this.loading = true;

  name =  form.value.name,

  if (confirm('Are you sure you want to update?')) {
    this.subscription = this.prodService.update(name)
    .subscribe(
      data => {
       this.loading = false;
       console.log(data); 
     },
     error => {
       this.loading = false;
       console.log(error);
     });
  }
}

Answer 1

试试下面的：

onUpdate(form: NgForm) {
  this.loading = true;

  name =  form.value.name,
var _confirm = confirm('Are you sure you want to update?');
  if (_confirm ) {
    this.subscription = this.prodService.update(name)
    .subscribe(
      data => {
       this.loading = false;
       console.log(data); 
     },
     error => {
       this.loading = false;
       console.log(error);
     });
  }
else {
 this.loading = false;
}
}

Answer 2

当用户单击取消时，只需添加一个 else 条件。

onUpdate(form: NgForm) {
  this.loading = true;

  name =  form.value.name,

  if (confirm('Are you sure you want to update?')) {
    this.subscription = this.prodService.update(name)
    .subscribe(
      data => {
       this.loading = false;
       console.log(data); 
     },
     error => {
       this.loading = false;
       console.log(error);
     });
  } else {
    this.loading = false;
  }
}