beyond/lib/engine/mformat/index.js

The Full Stack Universal Typescript Framework

const toHtml = new (require('ansi-to-html'))();

// Convert from ES6 module to AMD, CJS, SystemJS
module.exports = function (specs) {
	'use strict';

	const { code, map, mode } = specs;

	if (!['amd', 'esm', 'cjs', 'sjs'].includes(mode)) {
		throw new Error('Invalid parameters');
	}

	if (mode === 'esm') return { code, map };

	const plugins = (() => {
		const options = { importInterop: 'none' };

		if (mode === 'amd') return [['@babel/plugin-transform-modules-amd', options]];
		if (mode === 'cjs') return [['@babel/plugin-transform-modules-commonjs', options]];
		return [['@babel/plugin-transform-modules-systemjs', options], '@babel/plugin-proposal-dynamic-import'];
	})();

	let output;
	try {
		output = require('@babel/core').transform(code, {
			cwd: __dirname,
			sourceMaps: !!map,
			inputSourceMap: map,
			compact: false,
			plugins,
		});
	} catch (exc) {
		let message = toHtml.toHtml(exc.message);
		message = message.replace(/\n/g, '<br/>');
		message = `<div style="background: #333; color: white;">${message}</div>`;
		message = `Error transforming to ${mode} module: <br/><br/>${message}`;
		return { errors: [message] };
	}

	return { code: output.code, map: output.map === null ? void 0 : output.map };
};