Can importing a library generate a fresh copy of the imported library?

In my development setup using webpack and vue-loader to build a Vue.js application, I have various .vue files for different components. Whenever I include the line:

import _ from 'lodash'

in the script section of both ComponentA.vue and ComponentB.vue, I am curious whether this results in two distinct instances of lodash being imported or if it just imports a shared reference?

Answer №1

When importing any part of an ES6 module, whether default or named exports, it results in creating an unchangeable binding.

While CommonJS modules export values, ES6 modules export immutable bindings. This concept is further elaborated in the following blog post.

[ Source: ES6 Module Exports ]

In conclusion, the imports do not duplicate the exports but rather create a reference to the same initial value stored within the module structure.

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