Using babel presets

- [Instructor] To talk about a few other presets…that we can use, let's first introduce TC39.…TC39 is the ECMAScript committee that's responsible…for deciding what should be included…in the ECMAScript language specification.…Members of the committee and the community at large…will suggest ideas for new language features.…Then these proposals go through a series…of acceptance stages, zero to three.…The higher the number, the closer it is to acceptance.…So stage four means that a proposal has been accepted.…

Stage three means it's really close.…So generally once a proposal advances to the spec,…browsers will implement those features.…Some browsers will implement features that are still…going through the process, at stages one, two, or three.…So as developers, we could wait for all of these features…to be implemented, or we can use Babel…to transform new JavaScript…into browser-compatible JavaScript.…So let's take a look at how we would make use…of some of these features.…

So let's say I really, really want to use…