Major JavaScript Data Structures
Javascript itself doesn't have a lot of built-in data structures to speak of, actually.
If I were in your shoes, I'd give myself a run-down of data structures in general, which apply to programming in general instead of any specific language.
If you're not feeling confident about JS in particular, one resource I'd recommend would be the Mozilla Developer Network, and in particular this guide which should cover a lot of ground, including the core object types (Array, String, Date, etc). You can always give a look to w3schools, but I don't really recommend it much anymore as it has a number of inaccuracies.
Good luck on your interview!
EDIT: You could probably even try to implement certain data structures in JS to get to grips with how you would go about it. Knowing how a red-black tree works is really great and all, but knowing how to implement it nicely in a given language is definitely a plus! ;)
Understand this question is old - 9yrs, things have changed a lot around Javascript with the vision of javascript everywhere - front-end(react, next, vue ...), back-end(node.js) and everywhere (electron, pouchdb, nedb, ...) in between. For those landing on this question, here are some more options apart the from above links for Modern Javascript Tutorial data structures
Mnemonist Nice collection of well documented and maintained common data structures
Standard Data structures
Others:
Eloquent Javascript
Google Javascript Style Guide
AirBNB Javascript Style Guide
Data structures are language agnostic, so - keep practicing and Good luck with the interviews.
Strange as it may sound, a Javascript object is a data structure. I'd even say it is the major data structure in Javascript. It is a container that provides encapsulation for both other types of data as well as functions. Objects also act as associative arrays.
Function is first-class in Javascript, meaning you can pass it around as a parameter or a return value. That in my opinion makes it a kind of a data structure as well.