Object.assign window.location in IE11 Bug

[taddei]

It looks like in IE11, trying to do the following results in an error.

Object.assign({}, window.location)

This pattern is currently used by https://github.com/reach/router for example, breaking our pages in IE11

I've created a JSBin to highlight the issue

https://jsbin.com/yigocowero/1/edit?html,console

[ephor]

I have same issue

[ephor]

I found that if the window.location put as first argument, then everything works

Object.assign(window.location, {})

Also, if i change function that provided by polyfill-service to function that provided by babel, everything works too.

function assign(target) {
  for (var i = 1; i < arguments.length; i++) {
    var source = arguments[i];
    for (var key in source) {
      if (Object.prototype.hasOwnProperty.call(source, key)) {
        target[key] = source[key];
      }
    }
  }
  return target;
}

[JakeChampion]

Thanks for the excellent bug report, it is great to see a reproducible test case.

Looking into this it is also broken with the latest version of the service, I was hoping the new polyfill would have fixed it.

I'll have to set aside some time to find the root cause.

[taddei]

Thanks for looking into it. We had to disable Object.assign from polyfill.io and hardcode it for all users.

Not ideal but it works

[JakeChampion]

This was fixed in #155 and published in https://github.com/Financial-Times/polyfill-library/releases/tag/v3.32.0