Come on TC39, V8 and Node have implemented all but the most obscure parts of ES6–where is the standard for import?
NodeJS 6.1 passes 96% of ES6 tests, failing only on proper tail calls, iterator closing, and some Proxying of internal `get` calls.
But no standard is in sight for resolving resources based on the string in import statements.
View the compatibility table results at node.green
Chrome 49 boasts 91% ES6 support
Release 4.9 also makes block level constructs such as class and let available outside of strict mode and adds support for the sticky flag on regular expressions and customizable Object.prototype.toString output.
Read more from the source: v8project.blogspot.com
The changes are still in the proposal stage but could have a bright future.
Restrictions in Strong Mode include accessing missing properties throw exceptions, arrays cannot be sparse, all scoping errors are static, and classes are immutable.
Read more from The Google Developers Blog