Do you want to request a feature or report a bug?
Bug
What is the current behavior?
When trying to rehydrate markup in IE11 'Argument is not optional' error is thrown. It happens only if component has dangerouslySetInnerHTML prop.
Example
https://jsfiddle.net/oy9awLtq/
What is the expected behavior?
No error should be thrown
Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?
React version: 16
Browser: IE11