[Vuejs]-How to get `webpack.config.js` or `vue.config.js` file data globally in VueCLI 3

It not recommend to use data in vue.config.js directly. If you have some variables based on environment, use Modes and Environment Variables.

Its not recommended method even if you need to do that just try this.

import vueconfig from "./../vue.config.js";
new Vue({
    data:{
        config
    }
})

one thing you remember that we can’t define custom data in vue.config.js see this , If you want custom config rename the file.