I utilized the documentation provided on the Ionic website to incorporate Firebase into my mobile application.
this.firebase.getToken()
.then(token => console.log(`The token is ${token}`)) // store the token server-side and utilize it for sending notifications to this device
.catch(error => console.error('Error getting token', error));
this.firebase.onTokenRefresh()
.subscribe((token: string) => console.log(`Received a new token ${token}`));
In the code above, the use of 'then', 'catch', and 'subscribe' methods includes a variable followed by the "=>" symbol. Does this symbol have a universal significance or does it differ depending on the method being used? What precisely does it signify?
EDIT: With others marking this question as duplicate, I initially believed it was a new feature in TypeScript that I had not been aware of. In JavaScript, I had typically employed the traditional method as described in one of the responses. Nevertheless, this insight might prove beneficial to individuals like myself.