Import declaration transform to commonJS

importToCommon.js

//copy this into AST Explorer and run it against a standard import statement, like import React from 'react';

export default function ({types: t}) {
  return {
    visitor: {
		ImportDeclaration(path) {
          const {node} = path;
        	path.replaceWith(
            	t.variableDeclaration('var', [
                	t.variableDeclarator(t.identifier(`_${node.specifiers[0].local.name}`),
                                         t.callExpression(t.identifier('require'), [t.identifier(`'${node.source.value}'`)]))
                  	
                ])
            )
        }
    }
  };
}