===== Template Reference Variables =====
myInput을 주의해서 보시면 되겠습니다.
<code javascript>
import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'app-test-trv',
  template: `
  <h2>
    Welcome {{ name }}
  </h2>
  <input #myInput type="text">
  <button (click)="logMessage(myInput)">Log</button>
  `,
  styleUrls: ['./test-trv.component.css']
})
export class TestTrvComponent implements OnInit {
  name = "Codevolution";

  constructor() { }

  ngOnInit() {
  }

  logMessage(value){
    console.log(value);
  }
}
</code>