Manager-Webpack5
Builder implemented with webpack5 and webpack5-compatible loaders/plugins/config, used by @storybook/core-server to build the manager UI.
webpack4 is the default. To configure your Storybook to run webpack5, install @storybook/manager-webpack5 and @storybook/builder-webpack5 as dev dependencies then update your .storybook/main.js configuration.
module.exports = {
core: {
builder: 'webpack5',
},
};