Strict equality (===) vs non strict (==)

[bobbysebolao]

It's a good idea to use strict equality comparison (with the === operator) unless there’s a good reason not to.

The big difference between non strict and strict is that non strict comparison checks that two values are the same, whereas strict comparison also checks that the type of data (e.g. string, integer, boolean) is the same

if (item.id == idToMark) (line 60, logic.js)

You could change this to strict comparison to make this if statement more robust :)