无法在angular 2的AfterviewInit中获取DOM元素引用，同时超时可以在Chrome而不是IE中设置焦点

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

@Component({
  selector: 'app-example',
  template: '<div #myElement></div>'
})
export class ExampleComponent implements AfterViewInit {
  @ViewChild('myElement', { static: false }) myElementRef: ElementRef;

  ngAfterViewInit() {
    setTimeout(() => {
      const myElement = this.myElementRef.nativeElement;
      // 在这里可以操作myElement
    }, 0);
  }
}

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

@Component({
  selector: 'app-example',
  template: '<input #myInput type="text">'
})
export class ExampleComponent implements AfterViewInit {
  constructor(private elementRef: ElementRef) {}

  ngAfterViewInit() {
    setTimeout(() => {
      const myInput = this.elementRef.nativeElement.querySelector('input');
      myInput.focus();
    }, 0);
  }
}