Function resolveConfig

packages/webpack5/src/index.ts:221–244

(
	chainableConfig = resolveChainableConfig(),
)

 * @param chainableConfig Optional chain config to use.
 */
export function resolveConfig(
	chainableConfig = resolveChainableConfig(),
): webpack.Configuration {
	if (!hasInitialized) {
		throw error('resolveConfig() must be called after init()');
	}

	let config = chainableConfig.toConfig();

	// this applies webpack merges
	webpackMerges.forEach((mergeFn) => {
		if (typeof mergeFn === 'function') {
			// mergeFn is a function with optional return value
			const res = mergeFn(config, env);
			if (res) config = merge(config, res);
		} else if (mergeFn) {
			// mergeFn is a literal value (object)
			config = merge(config, mergeFn);
		}
	});

	// return a config usable by webpack
	return config;
}