Slots are part of a broader technology suite known as Web Components. They are one of the components that enable you to use separate DOM trees. If you are interested in learning more about slot and templates, check out the article Using Templates and Slots.
A slot is a small, narrow opening on the machine. Slots are used in various applications, including airports, where they manage the flow of air traffic. It is also a keyway in machinery.
A slot is also used in computer processors. There are many different types of slots. Some are virtual, and others are real. In general, slots follow standard C++ rules when called directly.
Slots can be invoked in any component, such as a function pointer, or by receiving a signal. Unlike callbacks, the slots may not know whether the signal is connected to it or not. The slots that do have this information will report a runtime error.
Another type of slot is an expansion slot. These include memory, AGP, and PCI slots. All of these are available in the Web Components technology suite.
One of the better shots in hockey is a well-placed one-timer from the high slot. A defenseman can stretch his or her vertical game by redirecting a shot with the stick.
Slots are also a great way to check on the quality of the latest software. For example, they could be used to see if a certain feature is compatible with a particular version.