Angular2 -获取文本值的选定部分

<input type="text" [(ngModel)]="textValue">

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

@Component({
  selector: 'app-example',
  template: `
    <input type="text" [(ngModel)]="textValue">
  `
})
export class ExampleComponent {
  @ViewChild('textInput') textInput: ElementRef;

  getTextSelection() {
    const inputElement = this.textInput.nativeElement;
    const selectionStart = inputElement.selectionStart;
    const selectionEnd = inputElement.selectionEnd;
    const selectedText = inputElement.value.substring(selectionStart, selectionEnd);
    console.log(selectedText);
  }
}