tl;dr: The coding interview used vanilla JavaScript/ES6 classes, and then I was asked to implement it within a framework.

The initial call with the recruiter was in December, and the technical coding interview was in January. I don't want to share the specific question to prevent them from changing it, but it's extremely similar to one that has already been mentioned here. Here are things I imagine they would not mind if I shared:

First, the initial interview with a recruiter was somewhat generic. She gave me an interview guide that looked like LeetCode, but then the coordinator sent me an interview preparation document that made it seem more like a frontend test. It was the latter.

There was no CodeSandbox; it was HackerRank. I was asked to create a component in JavaScript from a blank document, and then the subsequent question was to set it up in a framework of my choice (Vue, Angular, or React).

Create an ES6/JavaScript class with three specified functions, then set it up using a framework like React.