Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Front End Development for Back End Java Developers - Jfokus 2020

Matt Raible
February 04, 2020

Front End Development for Back End Java Developers - Jfokus 2020

Are you a backend Java developer that's being pushed into front-end development? Are you frustrated with all the JavaScript frameworks and build tools you have to learn to be a good UI developer? If so, this session is for you! We'll explore the landscape of UI development, including web standards, frameworks, and what’s on the horizon (e.g., micro frontends).

YouTube video: https://www.youtube.com/watch?v=DLQqJg393wM

Matt Raible

February 04, 2020
Tweet

More Decks by Matt Raible

Other Decks in Programming

Transcript

  1. Front End Development for Back End Java Developers February 4,

    2020 Matt Raible | @mraible Photo by Magnus Johansson flickr.com/photos/120374925@N06/15885090329
  2. OAuth 2.0 Overview Today’s Agenda JavaScript / TypeScript Build Tools

    JavaScript Frameworks CSS Front End Performance Progressive Web Apps
  3. Blogger on raibledesigns.com and developer.okta.com/blog Web Developer and Java Champion

    Father, Husband, Skier, Mountain Biker, Whitewater Rafter Open Source Connoisseur Who is Matt Raible? Bus Lover Okta Developer Advocate
  4. What about You? How many consider themselves backend developers? Java,

    .NET, Python, or Node.js? Do you write code for UIs? Do you like JavaScript? What JavaScript Frameworks do you use?
  5. TypeScript $ npm install -g typescript function greeter(person: string) {

    return "Hello, " + person; } var user = "Jane User"; document.body.innerHTML = greeter(user); $ tsc greeter.ts typescriptlang.org/docs/tutorial.html
  6. “Node.js is a JavaScript runtime built on Chrome's V8 JavaScript

    engine. Node.js uses an event-driven, non- blocking I/O model that makes it lightweight and efficient. Node’s package ecosystem, npm, is the largest ecosystem of open source libraries in the world.” nodejs.org github.com/creationix/nvm
  7. Front End Build Tools Old School: Gulp New School: SystemJS

    Hip: Webpack Web Dependencies: Old School: Bower New School: npm Hip: yarn
  8. Yeoman The web's scaffolding tool for modern webapps Helps you

    kickstart new projects Promotes the Yeoman workflow yeoman.io
  9. Write and Bundle // bar.js export default function bar() {

    // code here } // app.js import bar from './bar'; bar(); // webpack.config.js module.exports = { entry: './app.js', output: { filename: 'bundle.js' } } <!-- index.html --> <html> <head> ... </head> <body> ... <script src="bundle.js"></script> </body> </html>
  10. webpack.config.js module.exports = { entry: './src/app.js', output: { path: __dirname

    + '/src/main/webapp/public', filename: 'bundle.js' }, module: { loaders: [ { test: /.js$/, loader: 'babel', exclude: /node_modules/, query: { presets: ['es2015', 'react'] } } ] } };
  11. Hello World with Angular import { Component } from '@angular/core';

    @Component({ selector: 'my-app', template: `<h1>Hello {{name}}</h1>` }) export class AppComponent { name = 'World'; } <my-app></my-app>
  12. Hello World with Angular import { BrowserModule } from '@angular/platform-browser';

    import { NgModule } from '@angular/core'; import { FormsModule } from '@angular/forms'; import { HttpModule } from '@angular/http'; import { AppComponent } from './app.component'; @NgModule({ declarations: [ AppComponent ], imports: [ BrowserModule, FormsModule, HttpModule ], providers: [], bootstrap: [AppComponent] }) export class AppModule { }
  13. Hello World with Angular import { enableProdMode } from '@angular/core';

    import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { AppModule } from './app/app.module'; import { environment } from './environments/environment'; if (environment.production) { enableProdMode(); } platformBrowserDynamic().bootstrapModule(AppModule);
  14. ng-book A comprehensive guide to developing with Angular 8 Worth

    all your hard earned $$$ newline.co/ng-book/2 “Thank you for the awesome book. It's the bible for Angular.” — Vijay Ganta
  15. Imperative Code if (count > 99) { if (!hasFire()) {

    addFire(); } } else { if (hasFire()) { removeFire(); } } if (count === 0) { if (hasBadge()) { removeBadge(); } return; } if (!hasBadge()) { addBadge(); } var countText = count > 99 ? "99+" : count.toString(); getBadge().setText(countText);
  16. Declarative Code if (count === 0) { return <div className="bell"/>;

    } else if (count <= 99) { return ( <div className="bell"> <span className="badge">{count}</span> </div> ); } else { return ( <div className="bell onFire"> <span className="badge">99+</span> </div> ); }
  17. Hello World with Vue.js jsfiddle.net/chrisvfritz/50wL7mdz/ <div id="app"> <p>{{ message }}</p>

    </div> <script> new Vue({ el: '#app', data: { message: 'Hello Vue.js!' } }); </script>
  18. Vue.js Code <script src="https://unpkg.com/vue/dist/vue.js"></script> <div id="app"> <button v-on:click="clickedButton()">Click here!</button> </div>

    <script> new Vue({ el: '#app', methods: { clickedButton: function(event) { console.log(event); alert("You clicked the button!"); } } }); </script>
  19. Cascading Style Sheets #app { background: #eee; } .blog-post {

    padding: 20px; } .blog-post > p:first { font-weight: 400; } img + span.caption { font-style: italic; }
  20. Sass: Syntactically Awesome Style Sheets #app { background: #eee; .blog-post

    { padding: 20px; > p:first { font-weight: 400; } img + span.caption { font-style: italic; } } } sass-lang.com
  21. CSS Framework Stars on GitHub February 2020 0 35,000 70,000

    105,000 140,000 Bootstrap Foundation Pure Skeleton Angular Material Material UI Tailwind CSS
  22. Front End Performance Optimization Reduce HTTP Requests Gzip HTML, JavaScript,

    and CSS Far Future Expires Headers Code Minification Optimize Images
  23. HTTP/2 Binary, instead of textual Fully multiplexed, instead of ordered

    and blocking Can use one connection for parallelism Uses header compression to reduce overhead Allows servers to “push” responses proactively into client caches
  24. Mobile Hates You! How to fight back: Implement PRPL Get

    a ~$150-200 unlocked Android (e.g. Moto G4) Use chrome://inspect && chrome://inspect?tracing Lighthouse DevTools Network & CPU Throttling
  25. The PRPL Pattern Push critical resources for the initial URL

    route Render initial route Pre-cache remaining routes Lazy-load and create remaining routes on demand
  26. “Reusable UI widgets created using open web technology.” - MDN

    Web Components consists of four technologies: Custom Elements HTML Templates Shadow DOM HTML Imports Web Components https://www.polymer-project.org https://stenciljs.com https://www.webcomponents.org
  27. Security: OWASP Top 10 1. Injection 2. Broken Auth &

    Session Mgmt 3. Cross-Site Scripting (XSS) 4. Broken Access Control 5. Security Misconfiguration 6. Sensitive Data Exposure 7. Insufficient Attack Protection 8. Cross-Site Request Forgery 9. Components w/ Vulnerabilities 10. Underprotected APIs
  28. @spring_io #springio17 JHipster jhipster.tech JHipster is a development platform to

    generate, develop and deploy Spring Boot + Angular/React Web applications and Spring microservices. and Vue! ✨
  29. The JHipster Mini-Book Written with Asciidoctor Quick and to the

    point, 164 pages Developed a real world app: www.21-points.com Free Download from infoq.com/minibooks/jhipster-mini-book @jhipster_book
  30. What You Learned ES6 and TypeScript Node.js and nvm Angular,

    React, and Vue CSS and Sass Front End Performance Optimization Progressive Web Apps
  31. TRY

  32. Action! Don’t be afraid to try new things Learn JavaScript

    or TypeScript Try one of these frameworks Form your own opinions