There were two part for 1 hour interview.
Part 1, domain knowledge checks
Questions were
what do you know about Restful API,
what css preprocess do you use,
have you work on a11y ever
Part 2, coding part
Create a memorize function which take a function as input and return a function which remembers outputs from running the first function.
Build a infinity scroll page where API is given which return a list of items. You will need to listen to the scrolling event and call the API for the next set of data