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Rise above the Framework: JSCamp 2018
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Mike Hartington
July 23, 2018
Technology
1
1.4k
Rise above the Framework: JSCamp 2018
or: How I learned to love web standards and stop worrying.
Mike Hartington
July 23, 2018
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Transcript
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RISE ABOVE THE FRAMEWORK Mike Hartington • @mhartington
OR
HOW I LEARNED TO LOVE TO WEB STANDARDS AND
STOP WORRYING
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I WANT TO BUILD AN APP!
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WHAT HAPPENED…
Web Development used to be "easy" Take some jQuery, add
a bit of Backbone, and done Need something more hands on? Angular, Knockout, Ember
In a short amount of time, we went from simple
Script tags, to more advanced MVC-styled application architecture
Then… JSX, Decorators, Template compilation, code splitting, lazy loading,
CSS preprocessors, CSS-In-JS, build tools, configs files…
WHAT.
Frustrating But when in doubt, look to the standards Finding
balance
CSS JAVASCRIPT COMPONENTS
CSS Global Styles Variables/Dynamic values
GLOBAL CSS Can affect any component in the DOM Cascade
becomes difficult to reason Resets/Overrides become a thing
CSS-in-JS or CSS Modules
SHADOW DOM! Isolates component internals CSS is scoped: No more
global Simplified rules http://bit.ly/2L9fT7R
const header = document.createElement('div'); const shadowRoot = header.attachShadow({ mode: 'open'
}); shadowRoot.innerHTML = ` <link rel="stylesheet" href="style.css"> <style> h1 { font-family: "Impact"; } </style> <h1>Hello From Shadow DOM</h1> `; document.body.append(header); https://bit.ly/2L6QVWG
DYNAMIC VALUES?
CSS VARIABLES! Custom Properties: User declared values Works with/without ShadowDOM
Simplifies theming
:root { --app-color-red: #ff0011; --app-font-family: "Helvetica" } h1 { color:
var(--app-color-red); font-family: var(--app-font-family); } https://bit.ly/2L96nBo
<ELEMENT>.style.setProperty(`--app-color-red`, val); https://bit.ly/2O1AxUZ
JAVASCRIPT Cost of transpiling Reliance on Build Tools
JAVASCRIPT Adding Code the old way: Script Tags ES5 was
guaranteed
ESNEXT JavaScript moves fast Build Tools: New features, but today
Build Tool Fatigue
BUT GUESS WHAT?
<script type="module">
Supports async/await Supports Classes. Supports arrow functions. Fetch, Promises, Map,
Set, and more!
But what about older browsers?
<script nomodule></script>
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COMPONENTS Removing lock in Cross-framework support
COMPONENTS From MVC to Component AngularJS Directive (first?)
REACT All components, all the time
REACT class AppRoot extends Component { render() { return(
<div> <h1>hello world</h1> </div> ) } }
ANGULAR @Component({ selector: `app-root`, template: ` <div> <h1> Hello
World</h1> </div> ` }) class AppRoot{}
VUE Vue.component('app-root', { template: ` <div> <h1>Hello World</h1> </div>`
});
Different Framework Different API
CUSTOM ELEMENTS! Standards-based API Reusable components... NATIVELY No Framework required
class HelloWorld extends HTMLElement { constructor() { super(); } connectedCallback()
{ this.init(); } init() { this.innerHTML = `<h1>Hello World</h1>`; } } window.customElements.define('hello-world', HelloWorld);
Element Attributes & Properties ShadowDom (optional) Lifecycle Hooks Custom Events
MICRO-LIBS StencilJS SkateJS Lit-html/Lit-element/Lit-html-element
Angular Elements: Angular Components as WC Vue Target: --target web-component
React: custom-elements-everywhere.com
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CSS JAVASCRIPT COMPONENTS
What can Web Standards Do to help
THANK YOU </html>