Is it possible to declare methods and so on by condition?

Question

Vue.js

Hello, I have a question, is it possible to declare a method and so on by condition?
I wrote a slider, for a PC and a sensor, there are touch event handlers and methods for them, which are not used on the PC version. Is it possible to do something like

if(mobile){
  touchStart() ...
}

Answer 1

What problems?

created() {
  if(mobile){
    this.touchStart = () => {}
  }
}

But since mobile or non-mobile is defined once in the life of the application, it is more logical to move the definition of functions / methods to a separate file, like:

let touchStart;
if(mobile){
  touchStart = function() {}
} else {
  touchStart = function() {}
}

export {
  touchStart
}

import {touchStart, ...} from './helpers';
methods: {
  touchStart,
  ...
}

Or as a mixin:

const touchMixin = {
  methods: mobile ? {
    touchStart() {}
  } : {
    touchStart() {}
  }
}

mixins: [touchMixin],