Lesson 1 · What a hook is · step 10 of 1001Read02What a hook is03Task 104Task 205Task 306A hook or a line in the rules file07Task 408Task 509Recap10TakeawayTakeawayHook or rules-file lineLog in to read this lesson. A free account opens the introductory chapter.←RecapWhy the moment a hook runs decides what it can do→