Error message: "Failed to define variable in Vue application after importing script"

I have encountered an issue while attempting to import a JavaScript file into my Vue application, specifically in the main.js file. The console is displaying an error message stating

Uncaught ReferenceError: CI is not defined
.

The variable CI exists inside Defines.js, which is a third party library that I am unable to modify. Here is the snippet of code from the main.js file:

main.js

import Vue from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'
import './afw/Utils/Defines.js' // <<< this line!

console.log(CI) // <<< I received an error at this line!

Vue.config.productionTip = false

new Vue({
  router,
  store,
  render: h => h(App)
}).$mount('#app') 

Due to the confidentiality of Defines.js, I can only provide a part of its script:

var CI = {};

...

if (typeof module !== 'undefined') {
    module.exports = CI.Utils.Define;
}

I am seeking guidance on how to resolve this issue and make it work with VueJS 2. When I attempt to import other JavaScript files that rely on variables from Defines.js, I encounter the same problem:

import './afw/Utils/Defines'
import './afw/System/Core.js' // <<< Core.js requires a variable from Defines.js

Answer №1

The content of CI.Utils.Define is being revealed instead of the actual CI itself. To address this, you will need to export CI from within ./afw/Utils/Defines.js.

Although it functions correctly when included in a webpage through a script, where modules are not used and CI is declared on the window object, as you have observed, this isn't the case in module-based environments.

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