JSX Spread Attributes in IE-11 not working out of the box

[slaterbbx]

Is this a bug report?

Yes I believe this is a bug, but may not be. Based on the documentation I believe so.

Did you try recovering your dependencies?

Yes I did, tested on
Node version 11.2.0
Node version 11.5.0

Which terms did you search for in User Guide?

The issue is with the spread operator for attributes
https://reactjs.org/docs/jsx-in-depth.html#spread-attributes

Environment

Cannot run this, in my env it returns the error ( even run as admin )

npm ERR! code ENOLOCAL
npm ERR! Could not install from "kyleg\AppData\Roaming\npm-cache\_npx\1848" as it does not contain a package.json file.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\kyle\AppData\Roaming\npm-cache\_logs\2018-12-26T05_33_31_814Z-debug.log
Install for create-react-app@latest failed with code 1

Steps to Reproduce

1. Try to use JSX spread Attributes on an app that will render in IE-11
   EXAMPLE: from the website

function App2() {
  const props = {firstName: 'Ben', lastName: 'Hector'};
  return <Greeting {...props} />;
}

Expected Behavior

create-react-app should use babel env 'usage' to polyfill so that you do not get the error.
Object doesn't support property or method 'assign'
In IE-11

Actual Behavior

You get the error:
Object doesn't support property or method 'assign'
In IE-11

Not sure why, but images would not post, Images are hosted on imgur here:
https://imgur.com/a/qFTMRce

UPDATE:

so starting to realize there is very little reason to ever use this anyway... Maybe that is why no one has seemed to mention / notice this before. Basically deciding that there are far to many ways around this + seems like bad practice to use it anyway. You may want to look into this further since it does seem to be not supported by create-react-app out of the box, even though it is still a seemingly useless feature with so many more viable workarounds available.

[Timer]

Please see the documentation about supported browsers: https://facebook.github.io/create-react-app/docs/supported-browsers-features

[slaterbbx]

Hey @Timer good to know, Not sure why I assumed that preset env was being used with 'usage'.
But makes sense, sorry for the wasted time.

I see the docs clearly say "Note that this project includes no polyfills by default." lol, so yea, my bad :-D

Kyle