const request = require('request-promise'); const errorCodesUrl = 'http://raw.githubusercontent.com/facebook/react/master/scripts/error-codes/codes.json'; exports.sourceNodes = async ({boundActionCreators}) => { const {createNode} = boundActionCreators; const jsonString = await request(errorCodesUrl); createNode({ id: 'error-codes', children: [], parent: 'ERRORS', internal: { type: 'ErrorCodesJson', contentDigest: jsonString, }, }); };