component.js

import constantMixin from './ConstantMixin.js";


const MAX = 5;
const MIN = 0;

export default {
  name:"MyComponent",
  mixins:[
    constantMixin({ MAX, MIN }),
  ],
}

ConstantMixin.js

export default function constantMixin(constants={}){
  const computed = {};
  
  Object.keys(constants).forEach((key)=>{
    computed[key] = ()=>constants[key];
  });
  
  return { computed };

}