UI question when pressed . methods don't show up

in this video Use the reduce Method to Analyze Data - Functional Programming - Free Code Camp - YouTube

Hi there, what was the question you wanted to ask?

You know like in vs code or other code editors text is helpful , when we start typing the editor gives us options for various methods and completes previously declared variables .
wanted to ask which setting is that ?

That setting is not available on the freeCodeCamp editor.