Are there lessons for parcel in Russian? Problem or is it supposed to be like this?

Question

npm

Are there any tutorials on parcel and how is parcel different from gulp or webpack ?
Is this a problem or is it supposed to be that when the site is built, a script is added to the head. As I understand it, this is a package.json script or something else. How could it be avoided adding it or would it not really affect the performance of the site?