gatsby-browser.js

import React from 'react';
import PageContext from '~src/components/pageContext';

export const wrapPageElement = ({element, props: {pageContext}}) => (
  <PageContext.Provider value={pageContext}>{element}</PageContext.Provider>
);

// Disable prefetching altogether so our bw is not destroyed.
// If this turns out to hurt performance significantly, we can
// try out https://www.npmjs.com/package/gatsby-plugin-guess-js
// with data from the prior 1-2 weeks.
export const disableCorePrefetching = () => true;