next.js@3 static export utility

export-path.map.js

const root = `${__dirname}/pages`
const path = require('path')
const tree = require('directory-tree')

module.exports.exportPathMap = () => files(tree(root).children)
  .reduce((ret, file) => {
    ret[file] = {page: file}
    return ret
  }, {'/': {page: '/index'}})

function files(tree, result = []) {
  result
    .push(...tree
      .map(child => {
        if (child.children) {
          result.push(...files(child.children))
          return
        }
        return child
      })
      .filter(child => child && child.extension && child.extension.endsWith('.tsx'))
      .map(tsx => {
        if (tsx.size === 0) {
          console.warn(`${tsx.path} has zero size`)
        }
        return tsx.path
          .replace(root, '')
          .replace(tsx.name, `${path.parse(tsx.name).name}`)
      })
      .filter(name => !(name.startsWith('/_') || name.startsWith('/test'))))
  return result
}

isomorphic-query.js

//use this where component in component has `getInitialProps`
export const isomorphicQuery = query =>
  Object.keys(query).length === 0 && typeof window !== 'undefined'
    ? qs.parse(location.search.slice(1))
    : query