It is okay to differ on this. Language is not an exact science. It is however always good to factor in expectations when you describe things. E.g. when a title

It is okay to differ on this. Language is not an exact science. It is however always good to factor in expectations when you describe things. E.g. when a title says it shows you how to do a thing in vanilla javascript from scratch bringing in jquery in the first step makes that tile a lie. If you bring in a hefty dependency on step 1 and run three imported function the vanilla javascript part might be fine, but the from scratch starts to do some heavy lifting.