Function config

src/lib/babel-custom.js:67–204

(config, { customOptions })

			},

			config(config, { customOptions }) {
				const targets = customOptions.targets;
				const isNodeTarget = targets && targets.node != null;

				const defaultPlugins = createConfigItems(
					babelCore,
					'plugin',
					[
						{
							name: '@babel/plugin-syntax-import-meta',
						},
						!customOptions.jsxImportSource && {
							name: '@babel/plugin-transform-react-jsx',
							pragma: customOptions.pragma || 'h',
							pragmaFrag: customOptions.pragmaFrag || 'Fragment',
						},
						!customOptions.typescript && {
							name: '@babel/plugin-transform-flow-strip-types',
						},
						isTruthy(customOptions.defines) && {
							name: 'babel-plugin-transform-replace-expressions',
							replace: customOptions.defines,
						},
						!customOptions.modern &&
							!isNodeTarget && {
								name: 'babel-plugin-transform-async-to-promises',
								inlineHelpers: true,
								externalHelpers: false,
								minify: true,
							},
						!customOptions.modern &&
							!isNodeTarget && {
								value: [
									transformFastRest,
									{
										// Use inline [].slice.call(arguments)
										helper: false,
										literal: true,
									},
									'transform-fast-rest',
								],
							},
						{
							name: '@babel/plugin-proposal-class-properties',
							loose: true,
						},
						!customOptions.modern &&
							!isNodeTarget && {
								name: '@babel/plugin-transform-regenerator',
								async: false,
							},
						{
							name: 'babel-plugin-macros',
						},
					].filter(Boolean),
				);

				const babelOptions = config.options || {};