Cómo crear una variable global en Vue
// in main =.js
Vue.prototype.$appName = 'My App'
////in components
console.log(this.$appName)
perada
// in main =.js
Vue.prototype.$appName = 'My App'
////in components
console.log(this.$appName)
// on vue 3
const app = Vue.createApp({})
app.config.globalProperties.$myGlobalVariable = globalVariable
// on vue 2
Vue.prototype.$myGlobalVariable = globalVariable