Pattern · Core

Command

Turn a request into a standalone object — so you can parameterize, queue, log, and UNDO actions, and decouple the thing that triggers an action from the thing that performs it.

Asked atAmazonMicrosoftFigma
step 1 / 7
1/2Invoker hard-wired to the receiver
calls light.on()
Remote
+ press()
Light
+ on()
+ off()
Invoker hard-wired to the receiver
 1class Remote {
 2    Light light;
 3    void press(){ light.on(); }   // wired straight to the Light
 4}
✦

The Remote calls light.on() directly. It is hard-wired to one receiver and one action.