const parser = 'babel' function transformer (file, api) { const j = api.jscodeshift; const root = j(file.source); return root.find(j.Identifier) .forEach(path => { // find declaration for "moment" identifier if (path.node.name === 'moment') { j(path).replaceWith( j.identifier('dayjs') ); } }) .toSource(); } module.exports = transformer module.exports.parser = parser