fes.js/packages/fes-preset-built-in/src/plugins/commands/webpackConfig/define.js

import webpack from 'webpack';
import resolveDefine from './resolveDefine';

export default function createDefineWebpackConfig({
    config,
    webpackConfig
}) {
    webpackConfig.plugin('define')
        .use(webpack.DefinePlugin, [
            resolveDefine(config)
        ]);
}