Branca is a catchy name for IETF XChaCha20-Poly1305 AEAD message with an additional version number and timestamp. It is well suited to be used as an authenticated and encrypted API token. Branca specification does not specify the payload format. Among others you can use for example JWT payloads but still have modern encryption and smaller token size provided by Branca.
Comparing the good old jQuery with modern alternatives. Fetch is an upcoming native standard. Axios is an elegant promise based HTTP client. In the end everything is wrapped together with Vue.js to create an example online base62 decoder.