Runtime error when assigning type_ to textarea

[alex-tan]

Here are two variations of the same bug:

SSCCEs:

Trying to render the invalid DOM element initially (TypeError: Attempted to assign to readonly property outputted once)
When the DOM is patched after a successful render (Click edit button: TypeError: Attempted to assign to readonly property, outputted repeatedly.)

Presumably the issue is that this is invalid html (I inadvertently kept the type_ attribute from when the textarea was an input element before), so I'm not sure whether it's beyond the scope of the package to prevent against this type of invalid HTML issue.

[JoshuaHall]

I assume you already saw the docs for type_. I agree that this probably warrants a rework of the API considering it can result in a runtime error, which is one of the main things Elm tries to prevent. I'm just not entirely sure how to do so within Elm's type system.

[alex-tan]

The approach this library takes solves at least some of the potential issues.