React 16 (fiber) (#2996)

* Updating React to v16.0.0

* Updating error handling from ReactReconciler to componentDidCatch

* Using hydrate() instead of render() on client side.

* React 16 is not making `charSet` lowercase but that is in spec.

client/index.js

@@ -123,9 +123,9 @@ export async function renderError (error) {
   if (prod) {
     const initProps = { err: error, pathname, query, asPath }
     const props = await loadGetInitialProps(ErrorComponent, initProps)
-    ReactDOM.render(createElement(ErrorComponent, props), errorContainer)
+    ReactDOM.hydrate(createElement(ErrorComponent, props), errorContainer)
   } else {
-    ReactDOM.render(createElement(ErrorDebugComponent, { error }), errorContainer)
+    ReactDOM.hydrate(createElement(ErrorDebugComponent, { error }), errorContainer)
   }
 }
 
@@ -151,7 +151,7 @@ async function doRender ({ Component, props, hash, err, emitter }) {
 
   // We need to clear any existing runtime error messages
   ReactDOM.unmountComponentAtNode(errorContainer)
-  ReactDOM.render(createElement(App, appProps), appContainer)
+  ReactDOM.hydrate(createElement(App, appProps), appContainer)
 
   if (emitter) {
     emitter.emit('after-reactdom-render', { Component, ErrorComponent })

client/next-dev.js

 import 'react-hot-loader/patch'
-import ReactReconciler from 'react-dom/lib/ReactReconciler'
 import initOnDemandEntries from './on-demand-entries-client'
 import initWebpackHMR from './webpack-hot-middleware-client'
 
@@ -35,17 +34,3 @@ next.default()
   .catch((err) => {
     console.error(`${err.message}\n${err.stack}`)
   })
-
-// This is a patch to catch most of the errors throw inside React components.
-const originalMountComponent = ReactReconciler.mountComponent
-ReactReconciler.mountComponent = function (...args) {
-  try {
-    return originalMountComponent(...args)
-  } catch (err) {
-    if (!err.abort) {
-      next.renderError(err)
-      err.abort = true
-    }
-    throw err
-  }
-}

lib/app.js

@@ -5,6 +5,10 @@ import { warn } from './utils'
 import { makePublicRouterInstance } from './router'
 
 export default class App extends Component {
+  state = {
+    hasError: null
+  }
+
   static childContextTypes = {
     headManager: PropTypes.object,
     router: PropTypes.object
@@ -18,7 +22,15 @@ export default class App extends Component {
     }
   }
 
+  componentDidCatch (error, info) {
+    error.stack = `${error.stack}\n\n${info.componentStack}`
+    window.next.renderError(error)
+    this.setState({ hasError: true })
+  }
+
   render () {
+    if (this.state.hasError) return null
+
     const { Component, props, hash, router } = this.props
     const url = createUrl(router)
     // If there no component exported we can't proceed.

package.json

@@ -127,15 +127,15 @@
     "node-notifier": "5.1.2",
     "nyc": "11.2.1",
     "portfinder": "1.0.13",
-    "react": "15.5.4",
-    "react-dom": "15.5.4",
+    "react": "16.0.0",
+    "react-dom": "16.0.0",
     "standard": "9.0.2",
     "taskr": "1.1.0",
     "wd": "1.4.1"
   },
   "peerDependencies": {
-    "react": "^15.5.4",
-    "react-dom": "^15.5.4"
+    "react": "^16.0.0",
+    "react-dom": "^16.0.0"
   },
   "jest": {
     "testEnvironment": "node",

test/integration/basic/test/rendering.js

@@ -11,7 +11,7 @@ export default function ({ app }, suiteName, render) {
   describe(suiteName, () => {
     test('renders a stateless component', async () => {
       const html = await render('/stateless')
-      expect(html.includes('<meta charset="utf-8" class="next-head"/>')).toBeTruthy()
+      expect(html.includes('<meta charSet="utf-8" class="next-head"/>')).toBeTruthy()
       expect(html.includes('My component!')).toBeTruthy()
     })
 
@@ -23,7 +23,7 @@ export default function ({ app }, suiteName, render) {
 
     test('header helper renders header information', async () => {
       const html = await (render('/head'))
-      expect(html.includes('<meta charset="iso-8859-5" class="next-head"/>')).toBeTruthy()
+      expect(html.includes('<meta charSet="iso-8859-5" class="next-head"/>')).toBeTruthy()
       expect(html.includes('<meta content="my meta" class="next-head"/>')).toBeTruthy()
       expect(html.includes('I can haz meta tags')).toBeTruthy()
     })