What is a Slot?
A narrow notch, groove or opening, such as a keyway in machinery or a slot for a coin in a vending machine. Also: A period of time reserved for an activity, such as a meeting or a flight: We booked our flight for the next morning at 9:00 am (the slot).
In computerized slot machines, symbols line up on multiple reels to create winning lines. The machine’s pay table determines the odds and payout amounts for different combinations. Symbols vary with each machine, but classic symbols include fruit, bells, and stylized lucky sevens. Many slots have a theme, and the symbols and bonus features are aligned with it.
A slot is a way to render template content within a component without having to pass it through the parent scope. This is useful for situations where the child scope needs access to state in the parent scope but cannot use dynamic directive arguments. For example, if you want to have your header slot displayed in a page that’s rendered with a parent scope, you can use