[Vuejs]-Nuxtjs issue with IE11 compatibility_ object assign

After hours of struggling, I solved this with not good way(In my thought).

I just add object-assign polyfill js to nuxt.js

module.exports = {

    ...

    head: {
        script: [ { src: '/js/object-assign.js' } ]
    },

    ... 

};

But I still want to know the proper way to apply babel-polyfill into nuxt project.