md-select does not display default (null) option text in mat-select-value

Bug, feature request, or proposal:

Bug

What is the expected behavior?

Select should display text associated with null/undefined value when provided

What is the current behavior?

Select displays nothing

What are the steps to reproduce?

http://plnkr.co/edit/i919jzNOoXhlPeN4hxxE?p=preview

What is the use-case or motivation for changing an existing behavior?

Adding a default option with text for a null value should result in displaying the text when the current model value is null.

For example, adding a default option with text “None” <md-option>None<md-option>

should show “None” when the select list is closed.

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Angular: 4.3.4 Material: Beta 8

[josephperrott]

Closing as working as intended. As noted above, this was a deliberate choice made in the mat-select

[martin-the-geek]

If providing a <md-option [value]="undefined">None</md-option> or <md-option [value]="null">None</md-option> then I would think the intent is clear, even for untouched selects. Without those options, it’s clear that there is no associated text and the select should display a blank.

It just seems unexpected when <md-option [value]="someValue">Text</md-option> would display the text while <md-option [value]="null">None</md-option> does not.