Reproduction

In IE11, if you have a style attribute in your application, Preact throws an error.
This looks like a regression introduced in 10.4.8, as reverting to 10.4.7 yields happiness.

Steps to reproduce

1. Create something with a style attribute

const App = () => (
	<div style="display: block;">
		Hello World!
	</div>
)

2. Open your app in IE11
3. Check for errors

Expected Behavior

The application renders correctly, without any errors.

Actual Behavior

IE throws an error

Assignment to read-only properties is not allowed in strict mode

A workaround is to just use classes.