Components: Input type="file" support

[JDillon522]

Bug, feature request, or proposal:

Feature Proposal

What is the expected behavior?

Instead of creating a hidden input and a button to handle file uploads it'd be great for matInput to support type="file" inside a mat-form-field. This would make error handling much smoother and more in line the UI.
<input #fileUpload matInput mat-raised-button type="file" accept="image/png, image/jpeg, image/jpg">

What is the current behavior?

ERROR Error: Input type "file" isn't supported by matInput.

[jelbourn]

This has been on our backlog for a long time (which we track in Jira), but we don't have any plans to work on it. The biggest obstacle is a lack of a Material Design spec for it.

[p3x-robot]

up for material file upload

[tomavic]

Still hardly needed!!!

[kellyprankin]

This would be really great if it was available. It gets real awkward when you have such a nice form and then you gotta implement some hacky thing for the file upload that doesn't play nice with the rest of what we've built.

[kellyprankin]

This has been on our backlog for a long time (which we track in Jira), but we don't have any plans to work on it. The biggest obstacle is a lack of a Material Design spec for it.

Is there anything that can be done to help push for a Material Design spec for this?