fix(datepicker): export MD_DATE_FORMATS and MD_NATIVE_DATE_FORMATS

[crisbeto]

• Makes the MD_DATE_FORMATS and MD_NATIVE_DATE_FORMATS public.
• Fixes some trailing whitespace in the datepicker readme.

Fixes #4534.

[SamVerschueren]

Any idea when this will be released?

[karolmie1]

It's already available in beta.6 👍

[linuradu]

Could someone help me how can I customize date format with md-datepicker?

I'm using:

            <md-input-container class="whole-width">
            <input mdInput [mdDatepicker]="picker"  [(ngModel)]="contact.birthDate" 
                   placeholder="Birthdate">
                <button mdSuffix [mdDatepickerToggle]="picker"></button>
            </md-input-container>
            <md-datepicker #picker></md-datepicker>

And the date format that is sent to the backend is: 2017-06-14T21:00:00.000Z
I need to send like "MM/dd/yyyy"
Thank you!

[mmalerba]

@linuradu The NativeDateAdapter is not able to handle that format. Though we plan to add more adapters to material eventually, currently you'll have to create your own DateAdapter as described in the docs: https://material.angular.io/components/component/datepicker

[karolmie1]

@mmalerba Honestly this documentation is lacking and don't explain much. I wish there was an example or two to illustrate the process.

[rafaelss95]

@mmalerba Can you give a simple example of how to create a DateAdapter? As @karolmie1 mentioned, the documentation is really lacking a concrete example.

[mmalerba]

The NativeDateAdapter is a good example: https://github.com/angular/material2/blob/master/src/lib/core/datetime/native-date-adapter.ts

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