gatsby-node.js

const _ = require('lodash')
const path = require('path')


exports.createPages = ({ graphql, actions }) => {
  const { createPage } = actions

  return new Promise((resolve, reject) => {
    const pages = []
    const blogPost = path.resolve('./src/templates/blog-post.js')
    resolve(
      graphql(
        `
          {
            allMarkdownRemark(limit: 1000) {
              edges {
                node {
                  frontmatter {
                    path
                  }
                }
              }
            }
          }
        `
      ).then(result => {
        if (result.errors) {
          console.log(result.errors)
          reject(result.errors)
        }

        // Create blog posts pages.
        _.each(result.data.allMarkdownRemark.edges, edge => {
          createPage({
            path: edge.node.frontmatter.path,
            component: blogPost,
            context: {
              slug: edge.node.frontmatter.path,
            },
          })
        })
      })
    )
  })
}

exports.onCreateWebpackConfig = ({ actions }) => {
  actions.setWebpackConfig({
   resolve: {
      fallback: {
        path: require.resolve('path-browserify'),
      },
    },
  })
}