Not working on IE11 after upgrading to v5

[satazor]

react-helmet@5 uses requestAnimationFrame which IE 11 supports but has a weird bug in strict mode (which is turned on automatically when you use es6 modules).

Basically it must be either called with window context or bound to it or it will throw with Invalid calling object. See this thread that describes the same bug in vuejs: vuejs/vue#4465 and also their fix to it: ant-design/ant-design@0a9a388#diff-3537c7c5164da1c7f03e6eed0346218fR20.

[kernle32dll]

One could probably use #314 as a workaround till this issue is fixed properly.

[satazor]

@kernle32dll apparently I need to set defer to false in all places where I use <Helmet>. A solution is to create a Helmet wrapper that sets defer to false in its defaultProps but feels cumbersome.

[satazor]

@kernle32dll ended up doing this:

// Force default defer to `false` until Helmet works out a bug on IE11
// See: https://github.com/nfl/react-helmet/issues/336
Helmet.defaultProps.defer = false;

Hacky, but works for now.