React Lazy Ssr

In this modern web podcast, Rob Ocel and Jake Dohm speak about compilers with Minko Gechev (Angular Team at Google), Kristofer Baxter (Performance expert, a Software engineer at Google) and Radoslav Kirov (TypeScript support team at Google). Precompiling React / Twig templates for SSR. js environment invoked from ASP. Conference Events. Code-splitting your app can help you "lazy-load" just the things that are currently needed by the user, which can dramatically improve the performance of your app. It allows developers to create large web apps using simple components that are connected to one another, like lego pieces. All the final code of this tutorial can be found by clicking on the below button on my Github repository: Git Repo Server-side Rendering (SSR): Intro to Angular Universal In. * Improved our feature research process. Actividad Muy buen curso para cubrir todos los temas necesarios para poder hacer una app tradicional desde cero. lazy for lazily-loaded components, Clear fields on unmount to avoid memory leaks, Fix bug with SSR, Fix a performance regression. lazy function syntax like so:. SSR (v9) Powered by GitBook. In case, you liked the article, you can follow me here. Introduction to React • What is React? • Why React? • React version history • React 16 vs React 15 • Just React - Hello World • Using create-react-app • Anatomy of react project • Running the app • Debugging first react app Templating using JSX • Working with React. lazy is good, but too simple, yet. React is an incredible framework for building Single Page Application (SPA). The app has been developed over nearly 3 years and we are 6 developers on the team. Head to the index. 8 By Sachin Bhatnagar What is React?React is a library by Facebook that allows you to create super performant user interfaces. 123 It’s likely this will change in the future, but in the mean time, if you care about SSR, using react-loadable is your best bet for lazy loading React components. Founder, CEO. 47 version uses the 0. It allows code to render synchronously on both the server and initial page-loads on the client. lazy and if you are good with it, you don't need @loadable/component. Over the last couple of weeks I’ve been messing around with a new React-based project: trying to get Storybook + Theming + React + SSR + TypeScript all playing nicely together. PureComponentはstateをshallow Equalによってupdateするのかを決める機能を持っているが、class Componentでしか利用できない。. We sit with Tim Neutkens, lead developer on Next. Running Nightwatch E2E Tests with Headless Chrome and Vue CLI 3 If you want to run automated browser tests on a server without a dedicated GUI, you'll need to run Chrome in headless mode. What are the differences between React. Her movements drive a wild crowd and attract a lot of suitors, whom she never wanted. js is easy and fun; Building large scale, performant ones can be a bit harder. SDK 35 introduces full support for iOS 13 and two of the new user-facing features it introduces: Dark Mode and Apple Authentication. React has a hard-earned reputation for stability, and we intend to keep it that way. js file and import lazy and suspense from react like this: import { Suspense, lazy } from 'react'; To render a dynamic import as a regular component, the react documentation gives the react. Suspense 的使用一定程度上加快了首屏的渲染速度,使得我们的页面加载更快。 另外,当我们想添加一个新功能而引入一个新依赖时,我们往往会评估该依赖的大小以及引入该依赖会对原有bundle造成多大影响。. memo() React. In order to render the widgets, we install the npm dependency on the UI framework code and use react suspense api with lazy loading to SSR the code. React is quite simple but compiling an entire framework based on React is a challenging task;. The world’s leading companies use Next. If you want to read more about SSR in React 16, I recommend the following resources:. lazy is the recommended solution for Code Splitting. Rehydration: “booting up” JavaScript views on the client such that they reuse the server-rendered HTML’s DOM tree and data. js with npm. While React. React hook - lazy loading pattern Lazy loading some data, that you also want to save into your app data store is a common enough task to warrent abstracting to a common pattern. Join the community of millions of developers who build compelling user interfaces with Angular. The core React team is very active at updating the library and adding features. "Copy-pasting" projects could continue forever until unified initial setup with extendable webpack config. When React normally server-renders, it needs all the information in order to do so. - SPA, SSR and Static Websites, which one to use. === modified file '. The recommended Code Splitting library for React. 0" The react native 0. The adapter to use Expo universal modules with the React Native bridge 7 months ago. Works with SSR. Head to the index. lazy() doesn't make sense to use on the server side. 6: lazy, memo y más. lazy and Suspense on client side only On occasion, you may need to use a function or library that only works client side. Heavily inspired by prep and react-snapshot, but written from scratch. react-chartjsx. ng/iterators. Now SSR generates HTML code for authenticated users and makes authenticated isomorphic requests. React The reason behind the rising popularity of React. It is built for maximum development velocity: there is no CSS to import and no additional parameters to add to your Webpack configuration. Building progressive and performant sites with React. Name IM Last modified Is admin Publish scopes; @schibstedspain: Tue Jul 14 2015 19:25:38 GMT+0800 (China Standard Time) false. Designed for both client and server-side routing. lazy could load only "Components", loadable-components provides loadable. SSR'd pages often look deceptively loaded and interactive, but can't actually respond to input until the client-side JS is executed and event handlers have been attached. * Nivel Terciario o Nivel Universitario completo o finalizando los estudios. js is the entry point to the JSS React app when it's rendered on the server-side. react-helmet-async is an async version of the popular library react-helmet that works with streaming SSR. It uses Suspense and it is maintained by React. Hands-On Server-Rendered React Application with Next. js: Server side rendering a few months back, I used react router v3. メジャーな 2 大 JavaScript フレームワークである Angular と React、そしてこの 2 つには及ばないもののシェアを伸ばしてきている Vue. NET MVC (although it also works in other environments). Server-Side Rendering — SSR from here on — is the ability of a front-end framework to render markup while running on a back-end system. Initial project setup could become a standard like a code style conventions (styleguide). Understanding React Serverside Rendering — Part 1 - Bits and Pieces. That was, and still is, the main idea behind it. 0 is out today and is based on React Native 0. Lazy with React-Hot-Loader. Everyone says It’s hard to implement and maintain. Using npm: $ npm install --save react-router-dom Then with a module bundler like webpack, use as you would anything else:. Been a computer nerd ever since I can remember myself. 0 Support for comment nodes {/* */} Improved server-side rendering APIs Removed React. Grey zone 2 – SSR If you DON'T need SSR – please continue reading the article! React. In order to render the widgets, we install the npm dependency on the UI framework code and use react suspense api with lazy loading to SSR the code. Powered by Zeit, next. Hire Vladimir Metnew for freelance jobs on Arc. React allows you to disintegrate a user interface into components, a functional unit of an interface. It adds complexity to your development process. He has a master's degree in computer science and has loads of experience in software development using technologies such as Angular, React, and AWS. React version history: Version 0. Authentication, Realtime Database, Storage, FCM). Rehydration: “booting up” JavaScript views on the client such that they reuse the server-rendered HTML’s DOM tree and data. In addition, there are a number of internal performance gains as well as efficiency gains by enabling streaming rendered content to the client. The most straightforward way to fix the above issue is to rewrite the regular expression completely. lazy could load only "Components", loadable-components provides loadable. We need to teach this entry point how to successfully execute SSR with lazy loaded components, and to emit preload script tags for used components. This includes unit tests, generative (fuzzy) tests, integration tests, and internal dogfooding across tens of thousands of components. Finally, we are using transform-react-constant-elements to make hoist elements and reduces calls to react. Here are some additional points they speak about Zeolearn's React. Scored a peach against Hibs to rescue two points and did little else before being let go. lazy for lazily-loaded components, Clear fields on unmount to avoid memory leaks, Fix bug with SSR, Fix a performance regression. 6 new feature memo, lazy, suspense js react; 2018-10-09 welogger app development 4 - return to Web welogger react-native; 2018-06-16 css development - past & future react css component; 2018-06-15 had a try at storybook with. Learning curve Naturally, a software engineer must have a certain background to master each technology. 12 Steps to a Faster Web App. Initial project setup could become a standard like a code style conventions (styleguide). The app has been developed over nearly 3 years and we are 6 developers on the team. Lazy Load Website Assets for Better User Experience. Angular is a platform for building mobile and desktop web applications. js you don’t need to use all the ecosystem, which many times, it’s what makes difficult to begin. Join the community of millions of developers who build compelling user interfaces with Angular. Its creators even encourage developers to look for alternatives if they want advanced features, like server. what loadable-component and react-universal-component do in addition handle some SSR stuff. In addition, once the component mounts on the client, you can load any component you want, lazily. By default, the dev-server will reload/refresh the page when file changes are detected. At least on a quick, lazy experiment (wrapping a r/create-class with a r/reactify-component and calling it with :>) they were correctly called (tested did-mount, will-unmount, did-update). Aprende a usar los nuevos features de React v16. Rehydration: “booting up” JavaScript views on the client such that they reuse the server-rendered HTML’s DOM tree and data. A tag with a context="module" attribute runs once when the module first evaluates, rather than for each component instance. x’ SSR system. What is Create React App? Create React App is an officially supported CLI tool from Facebook to set up React apps, without having to deal with complicated configurations. On-demand or lazy loading of assets (images in particular) can help greatly in achieving better general performance of your web app. Because React uses components, it's easy to make a fetch request, or pull data from an api, store it in one component, and then import the entire component to the app, or parent component. It's IMPOSSIBLE. She longs for freedom, and the. Lazy Load Website Assets for Better User Experience. lazy and suspense to handle lazy loading of the artists component. Verify Lazy Loading is Working. React Router is a collection of navigational components that compose declaratively with your application. Then, the React attaches itself to it using a ReactDOM. ChunkExtractor entrypoints. hydrate function that is similar to ReactDOM. Head to the index. We want the speed of SSR, but the interactivity of CSR. React Component to lazy load images and other components/elements. If you need it - use the NextJs based version. I have created a React News web application with 3 different approaches to be able to understand performance and implementation differences between each other. Are you divorcing a narcissist husband? Have you had enough of his abuse? Are you tired of the bullying and intimidation? Learn how to defeat the narcissist. Update 2016-12-12: Some folks aren’t happy with the SSR’d code in the test, because it wasn’t generated the idiomatic way. We're excited to see what comes of that effort, but in the interim, there is a lot of value in addressing the issue of SSR performance with the React of today. There are 16970 observable variables and NO actionable varia. The adapter to use Expo universal modules with the React Native bridge 7 months ago. patch/etc/mpv. Now you can use the Suspense component to do code-splitting by wrapping a dynamic import in a call to React. ) MyINTERCEPTOR. Covering the basics. Daily S4CC Updates, S3CC & S2CC Updates Ask me anything Sims 2 CC. There are times when the initial blank html page being download for a React application is not perfect. react-router-dom. 采用SSR渲染使用' react-dom/server' 的 renderToString对React组件进行渲染的,因此只需要开发一套组件(React 模板),避免了开发多套模板的工作。 3、单页更好做用户体验的优化,这点也很重要。 重新翻阅了React、React-Router服务端渲染的API,. Web Development articles, tutorials, and news. React-Img-carousel almost covers all the basic needs but doesn't support the vertical sliding. Lazy Object Literal Initialization Classes are Useful Avoid Export Default Limit Property Setters null is bad outFile caution JQuery tips static constructors singleton pattern Function parameters Truthy Build Toggles Barrel Create Arrays Typesafe Event Emitter StyleGuide Common Errors TypeScript Compiler Internals Program AST TIP: Visit. 当ブログもGatsbyJsで構築されていますが、GatsbyJsのサイトのトップページに書かれている様に、驚くほど簡単に爆速モダンWebサイトを構築できます。. Create React App is an officially supported CLI tool from Facebook to set up React apps, without having to deal with complicated configurations. React & Webpack This guide will teach you how to wire up TypeScript with React and webpack. React hook - lazy loading pattern Lazy loading some data, that you also want to save into your app data store is a common enough task to warrent abstracting to a common pattern. js-like data fetching with any React SSR app that uses React Router 4. This project has all of it's few dependencies up to date and it will be updated on a regular basis. It allows code to render synchronously on both the server and initial page-loads on the client. Vuetify is a Material Design component framework for Vue. Angular is great again - making SSR app with high performance in google lighthouse While exploring the option on making a blog with content management system, I give a try on making use of koa2 + Postgres + Angular and the result turns out quite good. 'renderToString' comes from 'react-dom' package, which is used for client-side rendering. 6 new feature memo, lazy, suspense js react; 2018-10-09 welogger app development 4 - return to Web welogger react-native; 2018-06-16 css development - past & future react css component; 2018-06-15 had a try at storybook with. Whether you want to have bookmarkable URLs for your web app or a composable way to navigate in React Native , React Router works wherever React is rendering--so take your pick!. This Airframe project is a typical Webpack based React app, React Router also included together with customised Reacstrap. js file and import lazy and suspense from react like this: import { Suspense, lazy } from 'react'; To render a dynamic import as a regular component, the react documentation gives the react. resolveWeak is the foundation of universal rendering (SSR + Code Splitting), as used in packages such as react-universal-component. lazy and Suspense on client side only On occasion, you may need to use a function or library that only works client side. Elixir has truthy and falsy Boolean conditionals. In order to render the widgets, we install the npm dependency on the UI framework code and use react suspense api with lazy loading to SSR the code. At it would be created inside imported. js is one way that you can leverage React to support server-side rendering (SSR). ng/iterators. lazy and @loadable/components? React. Your code must run in two different environments: client-side and server-side (in a Node. Great work from the React team on this release - it's exciting to see some big enabling features like suspense and lazy being baked into the library (rather than falling back on solutions like react-loadable). createElement. Oct 13, 2019- Explore krishaamer's board "Medium", followed by 988 people on Pinterest. v-click-outside - Vue directive to react on clicks outside of an element without stopping the event propagation. Likewise, Create React App is one way that you can leverage React to support client-side rendering (CSR). While the above might improve in the future, we can take matters in our own hands and add the Server-Side Rendering (SSR). js with npm. Hands-On Server-Rendered React Application with Next. With the breadth of components offered by KendoReact, you can rely on the suite to provide a consistent look and feel across any UX and design requirements. js using Razzle. The /server/server. It doesn't matter if you have over a thousand components and tens of thousands of lines of code. js, it's now a great alternative for Vue users. For some, SSR just isn't that important. We sit with Tim Neutkens, lead developer on Next. 先述の通り、ReactのrenderToStringを修正して非同期レンダリングを実現するのはほぼ不可能です。しかしマルチプロセスを使い、CPU負荷の大きな. js Server-Side Rendering. On the next part of the Next meets React series we will work on a simple web app to grasp each and every next features. Move it far enough away from the connection so the heat does not make it react. With SSR (Server Side Rendering) we can change that so that when we navigate to a page, we get pre-rendered HTML like we did in the pre SPA days To get this in Angular you do: ng add @ nguniversal / express - engine -- clientProject angular - io - example. ChunkExtractor entrypoints. This includes unit tests, generative (fuzzy) tests, integration tests, and internal dogfooding across tens of thousands of components. Here are some other cool features Next. react-ssr-setup - React Starter Project with Webpack 4, Babel 7, Flow, CSS Modules, Server Side Rendering, i18n and some more niceties 32 This is just another React Starter Project as there are literally hundreds of others out there. Actividad Muy buen curso para cubrir todos los temas necesarios para poder hacer una app tradicional desde cero. Note that to use React. Zama Khan Mohammed is a software architect, building enterprise web applications, with more than 7 years of experience. Learning curve Naturally, a software engineer must have a certain background to master each technology. Head to the index. How would it differ from code splitting on the server. In order to render the widgets, we install the npm dependency on the UI framework code and use react suspense api with lazy loading to SSR the code. While React. Introduction to React Next. 1 The official Semantic-UI-React integration. Learn how it works and what abnormal EEG results can mean. 技术胖-胜洪宇关注web前端技术-前端免费视频第一博客. If you're not universally rendering on the server, you're at risk of choking search engine visibility. You might want to check out react-loadable to handle the cases where you wish to preload components server side. It's IMPOSSIBLE. Previously, React would attach a new listener every time a promise is thrown, regardless of whether the same listener was already attached during a previous render. Now SSR generates HTML code for authenticated users and makes authenticated isomorphic requests. js を採用したウェブサイトは基本的に Google 検索においてうまく機能する。. React gallery. I mean, you can build it at the moment (clunkily) yourself using Promises and stateful wrapping components. lazy并不适合SSR. Keep in mind that it's possible to add Angular Universal on any server as long as it can interact with Angular's renderModuleFactory function, but the configuration will most likely be different than the one demonstrated in this post. js is the entry point to the JSS React app when it's rendered on the server-side. You can use it with React Router. The recommended Code Splitting library for React. Besides React, it integrates such libraries as webpack and Babel. The app hangs once adding HTTP_INTERCEPTORS provide statement, the app runs properly without it ( even I empty MyInterceptor class. both can be used with react-i18next. Been a computer nerd ever since I can remember myself. Pre-renders a web app into static HTML. 6k ngfactory lazy loading ssr. When accessing Eloquent relationships as properties, the relationship data is "lazy loaded". Actividad Muy buen curso para cubrir todos los temas necesarios para poder hacer una app tradicional desde cero. Here, we will cover the routes configuration, the actions and all the react components starting from the Root. ChunkExtractor entrypoints. So you want to do routing with your Redux app. On-demand or lazy loading of assets (images in particular) can help greatly in achieving better general performance of your web app. React Storefront, our open source React framework for eCommerce PWAs, has an Image component that provides lazy loading via react-visibility-sensor. High performance and SEO friendly lazy loader for images, iframes and more react-ssr-optimization. It provides a default setup for tools like webpack and Babel that are useful in a modern development pipeline. js file rendered. lazy and if you are good with it, you don't need @loadable/component. Next Slogan. This Airframe project is a typical Webpack based React app, React Router also included together with customised Reacstrap. It allows code to render synchronously on both the server and initial page-loads on the client. The adapter to use Expo universal modules with the React Native bridge 7 months ago. createElement. Lazy makes a point of saying react. js file and import lazy and suspense from react like this: import { Suspense, lazy } from 'react'; To render a dynamic import as a regular component, the react documentation gives the react. Since you may need to fetch from multiple sources, or have multiple fetches from the same source, dividing it up into components will help keep your code. react-router-dom. Great work from the React team on this release - it's exciting to see some big enabling features like suspense and lazy being baked into the library (rather than falling back on solutions like react-loadable). Up until now, most of the industry experts have recommended Zeolearn as the best React. js server-side rendering optimization with component. If you're not universally rendering on the server, you're at risk of choking search engine visibility. @loadable/component provides a. js を採用したウェブサイトは基本的に Google 検索においてうまく機能する。. A React Universal Component: simultaneous SSR + Code Splitting For "power users" the traditional SPA is dead. js-like data fetching with any React SSR app that uses React Router 4. 124 Chapter 7: Hooks — Building Simpler React Apps. メジャーな 2 大 JavaScript フレームワークである Angular と React、そしてこの 2 つには及ばないもののシェアを伸ばしてきている Vue. lazy helps to lazy load the components so that users can only download the required data related to that page. Angular Service Layers: Redux, RxJs and Ngrx Store - When to Use a Store And Why? Last Updated: 26 April 2019 local_offer NgRx, Angular Architecture This post is part of the ongoing Angular Architecture series, where we cover common design problems and solutions at the level of the View Layer and the Service layer. Use React and Redux to build complex and large applications. Code-Splitting is a feature supported by bundlers like Webpack, Rollup and Browserify (via factor-bundle) which can create multiple bundles that can be dynamically loaded at runtime. Likewise, Create React App is one way that you can leverage React to support client-side rendering (CSR). Lazy Loaded Routes Angular V8 with Ivy. lib, which would return a library via renderProps API, and there is the same helper for react-loadable, plus react-imported-component provides just an useImported hook, which gives you the ability to load whatever you want, whenever you want. Note(no bad blood): Why you should choose next is just my opinion, I have no problem with you handling SSR on your own nor do I have trouble with devs using react-scripts. WSK - LAZY ONE. You’ll learn hooks in-depth, CSS-in-JS with emotion, increase performance with code splitting and server-side rendering, add TypeScript, test your app with Jest …and more!. At the same time, there are significant drawbacks to enabling SSR. 5 (2018-10-26) Updated NPM packages: react, redux, react-router. lazy() method which is equivalent to React. Now let us see how to use react. At this point, we could either or use Angular Universal for runtime SSR with NodeJS or build-time prerendering. afterLoad Function Function called after the image has been completely loaded. npm install @apollo/react-ssr getDataFromTree The getDataFromTree function takes your React tree, determines which queries are needed to render them, and then fetches them all. js, it's now a great alternative for Vue users. 0 (0 ratings) Course Ratings are calculated from individual students’ ratings and a variety of other signals, like age of rating and reliability, to ensure that they reflect course quality fairly and accurately. Introduction to React Next. The goal is the predict the values of a particular target variable (labels). js that is in your control!. component('lazy', => import('. But Vue is not to be outdone, because they have nuxt. You MUST move to Pug to FIX this. Your goal is to be interactive in under 3 seconds, even on a basic phone over a 3G connection. Head to the index. If you lazy load your components, you load only what's necessary for the user and I think that is the biggest win with using React. * React Hooks * Redux * Typescript * Styled components (opcional pero es un plus) * Ingles avanzado. SSR a "create-react-app" the hard way. Everyone says It's hard to implement and maintain. Initial project setup could become a standard like a code style conventions (styleguide). Putting too much logic in your templates can make them bloated and hard to maintain. As you might guess the withNamespaces hocs role is to lazy load the needed namespaces. js and React. You may have seen Dan's talk about React Suspense at JSConf Iceland. Fix performance of React. For SSR (server-side rendering), you have to know what data your components need ahead of time. Since everything is JavaScript driven, React renders only the code that is necessary based on application's state. afterLoad Function Function called after the image has been completely loaded. 5 (2018-10-26) Updated NPM packages: react, redux, react-router. 0 にて追加された新機能を試してみました。 reactjs. * Created a library to help us integrate Figma to our workflow. Create React App is an officially supported CLI tool from Facebook to set up React apps, without having to deal with complicated configurations. Currently the vendors and the app bundles are the ones our clients will initially download when first loading the page. In this video we'll show how to use Suspense along with @reach/router and React. Nx is a set of Extensible Dev Tools for monorepos, which we developed at Nrwl based on our experience working at Google, and helping Fortune 500 enterprises build ambitious Angular applications…. Prerendering with Universal. This is the third article in a series of posts on react, redux and webpack. Putting too much logic in your templates can make them bloated and hard to maintain. What is a PWA edit. I can work with GraphQL, SocketIO, Node, React, Angular, angularJS, Apollo, Rxjs, Karma, Sinon, Bluebird, Restify and any JS framework/library (if you give me a few weeks). When accessing Eloquent relationships as properties, the relationship data is "lazy loaded". js training provider. React has a hard-earned reputation for stability, and we intend to keep it that way. Step by step practical guide on building an Angular 8|9 Universal CRUD (Create, Read, Update, Delete) operation web application with MongoDB Server-side Rendering (SSR). Vuetify is a Material Design component framework for Vue. js is the unparalleled support and love shown to the framework by the community of JavaScript developers. Supports IntersectionObserver and includes a HOC to track window scroll position to improve performance. json, which contains information about all your entries and chuncks from webpack. Note that to use React. 5 (2018-10-26) Updated NPM packages: react, redux, react-router. Understanding React Serverside Rendering — Part 1 - Bits and Pieces. The Image component also does a few other things, like switching to amp-img when rendering AMP, downscaling images for smaller screen sizes to save bandwidth, and providing fallback images for URLs that fail to load. lazy is also not yet available for SSR. ReactEurope is historically the place where many new industry standards in the React community are revealed to the world such as the first public demo of redux and time travel, the release of GraphQL, react native reanimated, mobx-state-tree and more. js to build server-rendered applications, static websites, and more. SSR'd pages often look deceptively loaded and interactive, but can't actually respond to input until the client-side JS is executed and event handlers have been attached. lazy support from RHL size, so they could not be reloaded without state loss if lazy is created not in the user space. Keep in mind that it's possible to add Angular Universal on any server as long as it can interact with Angular's renderModuleFactory function, but the configuration will most likely be different than the one demonstrated in this post. js file rendered. js is easy and fun; Building large scale, performant ones can be a bit harder. A React Universal Component: simultaneous SSR + Code Splitting For "power users" the traditional SPA is dead. Move it far enough away from the connection so the heat does not make it react. Overview of React JS. Prerendering with Universal. client is all done on the client. find here the features of each table component with demo and documentation. lazy is great for loading a component, however when pre-rendering (SSR/static) this can be further optimized. Server Rendering, Code Splitting, and Lazy Loading with React Router v4 Server rendering + code splitting boils down to a single requirement. Build scalable React applications using the tools and techniques available in the React ecosystem. 0 引入了lazy和Suspense。React. SSR renders the initial page on the server (tautology), which reduces the initial render time, but on its own still passes down an entire JS bundle with ever page load. One reason might be Search Engine Optimization, another might be a slower initial render, especially on mobile devices. html from the client hosting app as firebase will not redirect to the server side index. He gives a brief overview and defines his use of the Uncanny Valley (called the Valley of Lies in his talk). lazy() React. We're excited to see what comes of that effort, but in the interim, there is a lot of value in addressing the issue of SSR performance with the React of today.