Browsers are adding support now: <a href="https:&#x2F;&#x2F;kangax.github.io&#x2F;compat-table&#x2F;es6&#x2F;" rel="nofollow">https:&#x2F;&#x2F;kangax.github.io&#x2F;compat-table&#x2F;es6&#x2F;</a>. Upcoming Chrome releases will have 90%+ compatibility if you only care about bleeding edge browsers.