angular-material2 md-autocomplete One md-autocomplete for multiple formControl

Example

This example requires FormsModule and ReactiveFormsModule. Please import them in your application/module.

import {FormsModule, ReactiveFormsModule} from '@angular/forms';

autocomplete-overview-example.html:

<md-input-container>
  <input mdInput placeholder="State" [mdAutocomplete]="auto" [formControl]="stateCtrl">
</md-input-container>

<p></p>

<md-input-container>
  <input mdInput placeholder="State2" [mdAutocomplete]="auto" [formControl]="stateCtrl2">
</md-input-container>

<p></p>

<md-input-container>
  <input mdInput placeholder="State3" [mdAutocomplete]="auto" [formControl]="stateCtrl3">
</md-input-container>

<md-autocomplete #auto="mdAutocomplete">
  <md-option *ngFor="let state of filteredStates | async" [value]="state">
    {{ state }}
  </md-option>
</md-autocomplete>

autocomplete-overview-example.ts:

import {Component} from '@angular/core';
import {FormControl} from '@angular/forms';

import 'rxjs/add/operator/startWith';
import 'rxjs/add/operator/map';

@Component({
  selector: 'autocomplete-overview-example',
  templateUrl: 'autocomplete-overview-example.html',
})
export class AutocompleteOverviewExample {
  stateCtrl: FormControl;
  stateCtrl2: FormControl;
  stateCtrl3: FormControl;
  filteredStates: any;

  states = [
    'Alabama',
    'Alaska',
    'Arizona',
    'Arkansas',
    'California',
    'Colorado',
    'Connecticut',
    'Delaware',
    'Florida',
    'Georgia',
    'Hawaii',
    'Idaho',
    'Illinois',
    'Indiana',
    'Iowa',
    'Kansas',
    'Kentucky',
    'Louisiana',
    'Maine',
    'Maryland',
    'Massachusetts',
    'Michigan',
    'Minnesota',
    'Mississippi',
    'Missouri',
    'Montana',
    'Nebraska',
    'Nevada',
    'New Hampshire',
    'New Jersey',
    'New Mexico',
    'New York',
    'North Carolina',
    'North Dakota',
    'Ohio',
    'Oklahoma',
    'Oregon',
    'Pennsylvania',
    'Rhode Island',
    'South Carolina',
    'South Dakota',
    'Tennessee',
    'Texas',
    'Utah',
    'Vermont',
    'Virginia',
    'Washington',
    'West Virginia',
    'Wisconsin',
    'Wyoming',
  ];

  constructor() {
    this.stateCtrl = new FormControl();
    this.stateCtrl2 = new FormControl();
    this.stateCtrl3 = new FormControl();
    this.filteredStates = this.stateCtrl.valueChanges
        .startWith(null)
        .map(name => this.filterStates(name));
    this.filteredStates = this.stateCtrl2.valueChanges
        .startWith(null)
        .map(name => this.filterStates(name));
    this.filteredStates = this.stateCtrl3.valueChanges
        .startWith(null)
        .map(name => this.filterStates(name));
  }

  filterStates(val: string) {
    return val ? this.states.filter(s => s.toLowerCase().indexOf(val.toLowerCase()) === 0)
               : this.states;
  }

}

Live Example