next-pages v0.2.2

next-pages

Usage

Due to the... complicated nature of Next.js's server/client compilation split, it's currently necessary to inject the list of available pages via publicRuntimeConfig.pages in your Next config. There's a configuration plugin available, which respects your pageExtension config option:

// next.config.js
const pages = require('next-pages/plugin')
module.exports = withPages({
  pageExtensions: ['js', 'jsx'],
})

The plugin also works nicely with next-compose-plugins:

// next.config.js
const withPlugins = require('next-compose-plugins')
const mdx = require('@zeit/next-mdx')
const pages = require('next-pages/plugin')

module.exports = withPlugins([
  mdx({extension: /\.mdx?$/}),
  pages
], {
  pageExtensions: ['js', 'md', 'mdx']
})

Note: If you don't use custom page extensions (.md, .mdx, etc.) you can omit any of the references to pageExtensions. The most minimal installation looks like:

// next.config.js
module.exports = require('next-pages/plugin')()

Then, in pages/_app.js, you can import the pages and root variables from next-pages:

// pages/_app.js
import React from 'react'
import App, {Container} from 'next/app'
import {pages, root} from 'next-pages'

export default class extends App {
  render() {
    const {Component, router} = this.props
    // pages.find() works here, too:
    const current = root.first(page => page.path === router.pathname)
    return (
      <Container>
        <h1>{router.pathname}</h1>
        <p>Current page: {JSON.stringify(current)}</p>
        <Component />
      </Container>
    )
  }
}

Page objects

Page objects are modified tree-model nodes with the shape:

{
  path: '/absolute/uri',
  file: './absolute/uri.js',
  isIndex: Boolean,
  parent: Node,
  children: [Node]
}

Nodes have some useful methods, including:

• getPath() returns an array of nodes representing the "path" from the root node to this one, and is useful for building breadcrumb navigation
• hasChildren() is a couple of characters shorter than children.length > 0
• isRoot() should be self-explanatory

A node's path should correspond to next/router's Router.pathname or props.router.pathname when you wrap a component in withRouter. See the page tree methods for some examples.

Pages list

The pages export is an array of page objects sorted alphabetically by their path.

Page tree

The root export is the top-most page object, and likely represents the / URL of your app. You can access the children Array of this object to get the list of top-level pages, or you can walk the tree with the following methods:

• root.first(func) returns the first node for which func(node) returns true. For instance, to get the current page inside a component decorated with withRouter:

  import {root} from 'next-pages'
  import {withRouter} from 'next/router'
  
  export default withRouter(({router}) => {
    const page = root.first(node => node.path === router.pathname)
    // do something with the page object
  })

• root.all(func) returns all nodes for which func(node) returns true. This is useful for finding all of the descendents of a path, e.g.

  import {root} from 'next-pages'
  import {withRouter} from 'next/router'
  export default withRouter(({router}) => {
    const pages = root.all(node => node.path.startsWith(router.pathname))
    // do something with the pages array
  })

• root.walk(func) executes func(node) for each node in the tree, and takes some additional options. You can use this to require() the files and metadata exported by your page components:

  // pages/_app.js
  import {root} from 'next-pages'
  const context = require.context('.', true, /\.(js|md)x?$/)
  root.walk(node => node.component = context(node.file))

  Note: you will need to call require.context('.', ...) from the pages directory for this to work properly!

Higher-order components

There are two higher-order components (decorators) that you can use to inject the pages list and tree values as props into components. Both of these also inject the router prop via withRouter for convenience:

withPages(Component)

Injects the page list as the pages prop:

import {withPages} from 'next-pages'
export default withPages(({pages, router, ...rest}) => {
  // ...
})

withPageTree(Component)

Injects the root page object as the pageTree prop:

import {withPageTree} from 'next-pages'
export default withPageTree({pageTree, router, ...rest}) => {
  // ...
})

[tree-model]: https://www.npmjs.com/package/tree-model
[withRouter]: https://github.com/zeit/next.js/#using-a-higher-order-component