WIP - add extractor, generate snippet_data

node_modules/gatsby/cache-dir/app.js

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+import React from "react"
+import ReactDOM from "react-dom"
+import domReady from "@mikaelkristiansson/domready"
+
+import socketIo from "./socketIo"
+import emitter from "./emitter"
+import { apiRunner, apiRunnerAsync } from "./api-runner-browser"
+import { setLoader, publicLoader } from "./loader"
+import DevLoader from "./dev-loader"
+import syncRequires from "./sync-requires"
+// Generated during bootstrap
+import matchPaths from "./match-paths.json"
+
+window.___emitter = emitter
+
+const loader = new DevLoader(syncRequires, matchPaths)
+setLoader(loader)
+loader.setApiRunner(apiRunner)
+
+window.___loader = publicLoader
+
+// Let the site/plugins run code very early.
+apiRunnerAsync(`onClientEntry`).then(() => {
+  // Hook up the client to socket.io on server
+  const socket = socketIo()
+  if (socket) {
+    socket.on(`reload`, () => {
+      window.location.reload()
+    })
+  }
+
+  /**
+   * Service Workers are persistent by nature. They stick around,
+   * serving a cached version of the site if they aren't removed.
+   * This is especially frustrating when you need to test the
+   * production build on your local machine.
+   *
+   * Let's warn if we find service workers in development.
+   */
+  if (`serviceWorker` in navigator) {
+    navigator.serviceWorker.getRegistrations().then(registrations => {
+      if (registrations.length > 0)
+        console.warn(
+          `Warning: found one or more service workers present.`,
+          `If your site isn't behaving as expected, you might want to remove these.`,
+          registrations
+        )
+    })
+  }
+
+  const rootElement = document.getElementById(`___gatsby`)
+
+  const renderer = apiRunner(
+    `replaceHydrateFunction`,
+    undefined,
+    ReactDOM.render
+  )[0]
+
+  Promise.all([
+    loader.loadPage(`/dev-404-page/`),
+    loader.loadPage(`/404.html`),
+    loader.loadPage(window.location.pathname),
+  ]).then(() => {
+    const preferDefault = m => (m && m.default) || m
+    let Root = preferDefault(require(`./root`))
+    domReady(() => {
+      renderer(<Root />, rootElement, () => {
+        apiRunner(`onInitialClientRender`)
+      })
+    })
+  })
+})