Following modules will be handed via umi by default, so you don't have to worry about webpack configuration for them.

• .js, .jsx, .mjs, .jsx, .json: handled by babel-loader
• .ts: handled by ts-loader
• .graphql, .gql: handled by graphql-tag/loader
• .css, .less, .sass: handled by css-loader, postcss-loader, less-loader
• .svg: handled by @svgr/core. You can import svg as component as below:

import { ReactComponent as Avatar } from './avatar.svg'

function Example() {
  return <Avatar />
}

All other unspecified modules will be handled via url-loader