How to remove focus from a ion-input in Angular 2+

问题:

It is possible to set focus using setFocus method from nativeEloment.

But how about remove focus?

How could I remove the cursor from and unselect an input from a template in a Angular 2+/Ionic 3 app?

I need to remove the focus because the mobile keyboard keeps open while a input has focus.

Edit: The input is a ion-input of Ionic2+.

回答1:

1) Add a template variable reference to your input in your component's template:

<ion-input #textInput>

2) Add ElementRef and ViewChild to your component's imports:

import { ElementRef, ViewChild } from '@angular/core'

3) Add @ViewChild variable and relevant methods to your component:

export class AppComponent {

  @ViewChild('textInput') textInput;

  setFocus() {
    this.textInput.nativeElement.focus();
  }

  removeFocus() {
    this.textInput.nativeElement.blur();
  }

}

You can trigger setFocus() or removeFocus() in a number of ways. Here's an example:

# app.component.html

<ion-input #textInput>

# app.component.ts

import { HostListener } from '@angular/core';

export class AppComponent {

  [previous code elided for readability]

  isInputActive: boolean;

  @HostListener('document:click', ['$event'])
  handleClickEvent(event: MouseEvent): void {
    if (document.activeElement !== this.textInput.nativeElement) {
      this.textInput.nativeElement.blur();
    }
  }
}