import-essex/transform.js

Import JSX as essex components in NodeJS

// Only load these if compiled source is not already cached
let babel, reactPreset;

const transform = async (source, filename) => {
  if (!babel) {
    babel = await import('@babel/core');
    reactPreset = await import('@babel/preset-react');
  }

  const presets = [
    [
      reactPreset.default,
      {
        runtime: 'automatic',
        importSource: 'essex',
        development: true,
        pure: false,
        useBuiltIns: true,
        useSpread: true,
      },
    ],
  ];
  try {
    const result = await babel.transformAsync(source, {
      presets,
      filename,
      sourceMaps: 'inline',
      babelrc: false,
      configFile: false,
    });

    return result.code;
  } catch (e) {
    console.error(e.message);
    throw e;
  }
};

export default transform;