Are npm modules duplicated?

Question

npm

I'm building a project with Gulp. I have a main.js file to which other files with scripts are connected: initialization of sliders, scripts for menus, etc. In these files I use plugins from npm, a probably stupid question arose: "If I connect the same npm module, for example JQuery, to different files, and then I connect these files to main.js - will the modules from npm be duplicated? "

Answer 1

Building a project with Gulp

Gulp cannot collect anything, since Gulp is a task runner (task launcher if in Russian), it can collect what Gulp launches, for example, a bundler (collector) like Webpack or Rollup, or just a file concatenator.

If I include the same npm module, for example JQuery, in different files, and then I include these files in main.js - will the modules from npm be duplicated?

depends on what you are collecting, if the usual concatenation of files - then yes, there will be duplication. And if Webpack or Rollup - no.