What is an Airport Slot?

IELTS Slot Booking: How to Book IELTS Exam slot is Add a slot to a component's HTML file so a parent component can pass markup into the component A component can have zero or more slots slot wild wild riches phrasal verb​​ slotted in; slotting in; slots in informal : to find a place for in a schedule, plan, etc I can slot you in at 2

slot angular $() won't be defined if the slot is not used and you'll get an exception you have to check for this $ 's existence