This package contains common node-side functionality used among the different frameworks (React, RN, Vue, Ember, Angular, etc).
It contains:
start-storybook
dev serverbuild-storybook
static builderThe "preview" (aka iframe) side is implemented in pluggable builders:
@storybook/builder-webpack5
These builders abstract both the webpack dependencies as well as the various core configurations and loader/plugin dependencies provided out of the box with Storybook.