of ES2015 and ES2016.
If you inspect the compiled code, you will see that some features are not compiled to ES5 code anymore, such as arrow functions and async/await.</p>
<p>This feature is backed by <a href="https://github.com/ai/browserslist">Browserlist</a> and <a href="http://caniuse.com/">Can I Use</a>.
These websites track usage stats of browsers, so you can use complex queries based on the user base of every browser.</p>
<p>If you want to target all browsers with more than a 4% market share in Canada