An event bus is a design pattern (and while we’ll be talking about JavaScript here, it’s a design pattern in any language) that can be used to simplify communications between different components. It can also be thought of as publish/subscribe or pubsub. The idea is that components can listen to the event bus to know when to do the things they do. For example, a “tab panel” component might listen for events telling it to change the active tab. … Read article “Let’s Create a Lightweight Native Event Bus in JavaScript”
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https://css-tricks.com/lets-create-a-lightweight-native-event-bus-in-javascript/
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