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Component based Frontend architecture with React.JS @BastianHofmann

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Application architecture

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Code and component  re-use

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Rapid Development

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Handling large code-bases

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With React.js

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With small and independent components

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webserver HTML browser JS controller

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webserver HTML browser JS Ajax controller

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webserver HTML browser JS Ajax controller

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de duplication ode duplication code duplication code duplication code duplication code duplication code duplication code duplication code duplication code duplication code duplication code duplication code duplication code duplicatio code duplicat code duplic code dup code du code cod co co

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A few words about me

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http://speakerdeck.com/u/bastianhofmann

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Application architecture

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status quo

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webserver loadbalancer pgsql memcached mongodb services

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webserver

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webserver HTML browser JS Ajax controller

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Duplication and only some Code re- use

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We can do  better

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Small components over big controllers

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Self contained

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Can be used everywhere

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JS is part of the component

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CSS can be part of the component

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http://facebook.github.io/react/

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JavaScript UI Library

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Many small, self contained, reusable components

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var HelloMessage = React.createClass(
 {
 render: function () {
 return
Hello {this.props.name}
;
 }
 }
 );
 
 ReactDOM.render(, mountNode);

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var Timer = React.createClass({
 getInitialState: function () {
 return {secs: 0};
 },
 tick: function () {
 this.setState({secs: this.state.secs + 1});
 },
 componentDidMount: function () {
 this.interval = setInterval(this.tick, 1000);
 },
 componentWillUnmount: function () {
 clearInterval(this.interval);
 },
 render: function () {
 return (
Seconds Elapsed: {this.state.secs}
);
 }
 });
 
 ReactDOM.render(, mountNode);

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var TodoList = React.createClass(
 {
 render: function () {
 var createItem = function (itemText) {
 return
  • {itemText}
    • ;
 };
 return (
      {this.props.items.map(createItem)}
    );
 }
 }
 );

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    var TodoApp = React.createClass({
 render: function () {
 return (

    


    TODO

    
 

    
 );
 }
 });

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    var Timer = React.createClass({
 getInitialState: function () {
 return {secs: 0};
 },
 tick: function () {
 this.setState({secs: this.state.secs + 1});
 },
 componentDidMount: function () {
 this.interval = setInterval(this.tick, 1000);
 },
 componentWillUnmount: function () {
 clearInterval(this.interval);
 },
 render: function () {
 return (
    Seconds Elapsed: {this.state.secs}
    );
 }
 });
 
 ReactDOM.render(, mountNode);

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    Getting the data in there

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    PHP Backend JSON React Frontend

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    PHP Backend JSON React Frontend

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    PHP Backend JSON React Frontend

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    var TodoApp = React.createClass({
 getInitialState: function () {
 return {items: […]};
 },
 render: function () {
 return (

    


    TODO

    
 

    
 );
 }
 });

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    PHP Backend JSON React Frontend

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    Problematic

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    Remember

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    Self-contained

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    Reusable

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    PHP Backend JSON React Frontend

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    PHP Backend JSON React Frontend

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    PHP Backend JSON React Frontend

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    PHP Backend JSON React Frontend

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    Overfetching

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    Underfetching

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    Solutions

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    GraphQL http://graphql.org/

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    PHP Backend React Frontend GraphQL

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    Request Cache

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    Batching

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    Multi-GET

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    Futures

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    Server side rendering

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    SEO

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    Better user experience

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    Several approaches

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    NodeJS service

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    Request HTML nodeJS service PHP process Data JSON Rendered HTML string React

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    Component based architecture

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    Benefits

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    Easy re-using of components

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    Enables developers to only focus on their components

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    Rapid prototyping

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    Easier Refactoring

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    Error Handling

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    Profile Publications Publication Publication Publication AboutMe LeftColumn Image Menu Institution

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    Profile Publications Publication Publication Publication AboutMe LeftColumn Image Menu EXCEPTION Institution

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    Profile Publications Publication Publication Publication LeftColumn Image Menu Institution

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    Experiments (A/B Testing)

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    Partial roll outs

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    Load components asynchronously

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    Conclusion?

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    Think about your architecture

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    Small reusable components are great

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    Refactor and make it better continuously

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    Frontend and backend are part of the same application

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    Don't rewrite your whole codebase in one go

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    http://twitter.com/BastianHofmann http://lanyrd.com/people/BastianHofmann http://speakerdeck.com/u/bastianhofmann [email protected]