diff --git a/snippets/createEventHub.md b/snippets/createEventHub.md index 57ed523b7..44eb57063 100644 --- a/snippets/createEventHub.md +++ b/snippets/createEventHub.md @@ -32,16 +32,18 @@ const createEventHub = () => ({ ```js const handler = data => console.log(data); const hub = createEventHub(); +let increment = 0; -// Listen for different types of events -hub.on('message', handler); // subscribe the handler to listen for a 'message' event -hub.on('message', () => console.log('Message event fired')); // subscribe a different handler to listen for a 'message' event -hub.on('double', number => console.log(number * 2)); // subscribe a handler to listen for a 'double' event +// Subscribe/listen for different types of events +hub.on('message', handler); +hub.on('message', () => console.log('Message event fired')); +hub.on('increment', () => increment++); // Emit events to invoke all handlers subscribed to them, passing the data to them as an argument hub.emit('message', 'hello world'); // logs 'hello world' and 'Message event fired' hub.emit('message', { hello: 'world' }); // logs the object and 'Message event fired' -hub.emit('double', 5); // logs 10 +hub.emit('increment'); // `increment` variable is now 1 -hub.off('message', handler); // unsubscribe a single handler from the 'message' event +// Unsubscribe/unlisten a handler from the 'message' event +hub.off('message', handler); ```