Web Components のリアル/ Realistic Web Components

by aggre

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Web Components HTML5 Conference 2018 @2018-11-25

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aggre @aggre_ @aggre FRAME00, INC. CTO aggre.io

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• Web Components (5min) • Web Components (5min) • Web Components (10min) • Web Components (20min)

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Web Components

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Custom Elements Shadow DOM HTML Templates ES Modules

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Custom Elements Shadow DOM HTML Templates ES Modules / Production-ready

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Custom Elements Shadow DOM HTML Templates ES Modules Edge Developing ‼

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IE • Windows 10 Edge • Windows 7 2020 1 • Windows 8.1 ? Edge … App

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Polyfills IE, Edge

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Polyfills IE, Edge Shadow DOM

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• / Polyfills OK • Edge , IE 2020 Polyfills

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Web Components

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• Custom Elements • Shadow DOM • HTML Templates • HTML Imports

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• Custom Elements • Shadow DOM • ES Modules

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• Custom Elements • Shadow DOM • HTML Templates • HTML Imports • Custom Elements • Shadow DOM • ES Modules

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HTML

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HTML

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Custom Elements

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Custom Elements

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Custom Elements Shadow DOM ES Modules

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Custom Elements Shadow DOM ES Modules Custom Elements Shadow DOM DOM

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Custom Elements

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DOM createElement()

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DOM createElement()

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destroy

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observedAttributes DOM

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observedAttributes DOM

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iframe adoptNode() ownerDocument

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iframe adoptNode() ownerDocument

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Shadow DOM

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DOM

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CSS

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Shadow DOM

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Shadow DOM

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Shadow DOM slot slot

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slot

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Shadow DOM slot

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• Custom Elements • • Shadow DOM DOM • slot Shadow DOM

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Web Components

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• • • • SSR • more…

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Web Components

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size=large

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Web Components

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e.g.

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e.g.

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Web Components xxx-dnd …

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Web Components

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e.g. React

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e.g. React Shadow DOM React render

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• Web Components • React, Angular, Vue… • • • :

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SSR Shadow DOM slot Hydrate SSR

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HTML

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shadowRoot render shadowRoot

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shadowRoot render shadowRoot slot

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shadowRoot render shadowRoot Hydrate

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shadowRoot render shadowRoot SSR

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• Custom Elements • Shadow DOM, slot • •

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Web Components

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…

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Web Components

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• • lit-html • Web Components • lit-html Web Components • lit-element • Angular/Vue

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• lit-html • lit-html Web Components • lit-element • Angular/Vue

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• lit-html • lit-html Web Components • lit-element • Angular/Vue Web Components

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• lit-html • lit-html Web Components • lit-element • Angular/Vue FW FW Web Components

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• lit-html • lit-html Web Components • lit-element • Angular/Vue

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( )

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• • innerHTML addEventListener DOM API •

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lit-html ( lit-html )

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lit-html

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lit-html

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lit-html html, render directive 3 API

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lit-html Tagged Templates

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lit-html HTML

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lit-html HTML DOM DOM

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lit-html DOM

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lit-html textContent

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@Event

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?attribute

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.property DOM

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Intellisense for lit-html typescript-lit-html-plugin, vscode-lit-html

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lit-html • lit-html • Intellisense • Web Components • … • lit-html • lit-element

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lit-element

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lit-html React.Component

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lit-element • TypeScript Native • lit-html • Web Components • @property({type: X}) • • lit-html .property

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lit-html

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lit-html

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JSX lit-html

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RxJS

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fit-html Redux + lit-html

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Directive API

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Directive API 1

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Directive API 0 -1

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Directive API directive

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Directive API

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Directive API render

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lit-html • TypeScript Native • JSX • Directive API • • Vue/Angular HTML React

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appendix

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lit-html, hyperHTML, htm Tagged Templates

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lit-html

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hyperHTML

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hyperHTML bind() DOM

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hyperHTML wire()

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htm

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htm htm ( preact )

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htm JSX

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htm …

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lit-html hyperHTML htm • (HTML Template Instantiation) • PolymerLabs/template-instantiation • Directive API • ES5 • Node.js • Tagged Templates JSX • preact vhtml developit/ WebReflection/ Polymer/

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( TypeScript Native lit-html )

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• lit-element Web Components • FP lit-html ( )

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• / Polyfills OK • Edge , IE 2020 Polyfills • Custom Elements • Shadow DOM DOM • slot Shadow DOM • • • lit-element Web Components • FP lit-html

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Thank you! @aggre_ @aggre aggre.io