Method declaration difference func() {} vs func: function(e) {}?

Question

Vue.js

The docs don't say anything about the difference https://v1.vuejs.org/guide/events.html
Can you please tell me what's the difference? And which is better to use?

Answer 1

func() {} is a shortened declaration of methods from es6
if you are using es6, then it is preferable to use it
(it is not clear what DOM events have to do with it, they do not affect this in any way)