typescript - iconSet[key].split is not a function

Question

I'm writing a Vue.js application using ts and Vuetify. I want to add a new prototype to all objects.

declare global {
  interface Object {
    toOneObject(): object;
  }
}

export default () => {
  Object.prototype.toOneObject = function () {
    return this
  }
}

As soon as I import it no matter where, an error occurs in Vuetify.

Uncaught TypeError: iconSet[key].split is not a function
at convertToComponentDeclarations (fa-svg.js?1845:9)
at eval (fa-svg.js?1845:16)
at Module../node_modules/vuetify/lib/services/icons/presets/fa-svg.js (chunk-vendors.js:8658)
at __webpack_require__ (app.js:854)
at fn (app.js:151)
at eval (index.js?6eb1:1)
at Module../node_modules/vuetify/lib/services/icons/presets/index.js (chunk-vendors.js:8694)
at __webpack_require__ (app.js:854)
at fn (app.js:151)
at eval (index.js?2e02:1)

I don't quite understand how this error occurs and how it is related. Before that I made a prototype for all arrays and it works fine

Answer 1

等待大神答复