Angular Material md-select default selected value

Question

I am using Angular 2 with Angular Material. Looking at the documentation, I am trying to get the select to have a default value as oppose to an empty place holder.

Answer 1

 <mat-select [value]="0" >

We can easily do it using setting value to default value

Answer 2

Use [(ngModel)]:

<mat-select [(ngModel)]="selectedOption">
  <mat-option value="1">One</mat-option>
  <mat-option value="2">Two</mat-option>
</mat-select>

Component:

selectedOption = '1';

DEMO

---

Edit #1:

Since Material2.0.0#beta10 (specifically this PR) you can select a value using the value property of MatSelect:

<mat-select [value]="selectedOption">
  <mat-option value="1">One</mat-option>
  <mat-option value="2">Two</mat-option>
</mat-select>

Component:

selectedOption = '1';

Note that you can also use it with two-way data binding -> [(value)].

DEMO

Answer 3

According to documentation you can do by the following way.

Option:1

<md-select value={{ defaultValue }}>
  <md-option value="{{ defaultValue }}">{{defaultValue}}</md-option>
  <md-option value="1">One</md-option>
  <md-option value="1">One</md-option>
  <md-option value="2">Two</md-option>
</md-select>

Option:2

<md-select value="None">
  <md-option value="None">None</md-option>
  <md-option value="1">One</md-option>
  <md-option value="1">One</md-option>
  <md-option value="2">Two</md-option>
</md-select>

It must any value of select dropdown. Else it will not work.