ES6 Nested Destructuring

I picked this up a while ago on Twitter, use it all the time in my React code, and wanted to document it here. If you're destructuring a JS object like this:

const { username, zip } = props.user;

A valid (and slightly better, in my opinion) refactor is this:

const { user : { username, zip } } = props;

As you add more destructured variables pulled from props, the object you're referencing stays the same.

Note that this doesn't define user-- if that's something you want, you have to destructure it on its own:

const { user, user : { username, zip } } = props;

While a little more verbose, I still think this makes for more maintainable destructuring long-term.