Enctype application/json Microsoft Edge

[dominikIncibit]

Description

We use the following code for our forms:

<iron-form id="ironForm">
    <form id="htmlForm" action="[[_url]]" enctype="application/json">

This works wonderfully in all browsers and submits the content as json. However Microsoft Edge doesn't support this enctype and just says 'invalid argument'. There is no way to submit the body in json format in Microsoft Edge

Expected outcome

Provide a way to submit the content in json format in all browsers

Actual outcome

The current method does not work in Microsoft Edge

Live Demo

Steps to reproduce

Use the code above. Microsoft Edge will complain

Browsers Affected

• Chrome
• Firefox
• Safari 9
• Safari 8
• Safari 7
• [x ] Edge
• IE 11
• IE 10