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Web Components
2018.04.23 @ Web Components Café by Polymer Japan
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aggre
@aggre_
@aggre
FRAME00, INC. CTO
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ooapp.co/aggre
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• Web Components
• Web Components
• Web Components
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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
• HTML Templates
• HTML Imports
HTML Imports?
ES Modules?
HTML Modules?
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• Custom Elements
• Shadow DOM
• HTML Templates
• HTML Imports
HTML Imports?
ES Modules?
HTML Modules?
ES Modules
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Custom Elements
Shadow DOM
HTML Templates
ES Modules
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Custom Elements
Shadow DOM
HTML Templates
ES Modules
IE
DOM
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Web Components
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•
•
•
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JavaScript my-app.js
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HTML index.html
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ESM index.html
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index.html
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No content
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DOM
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Web Components
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Web Components
Custom Elements
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React
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React
Custom Elements
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?
HTML my-app
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Custom Elements
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React
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Vue
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Vue
…?
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Custom Elements
vue-custom-element @angular/elements
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Custom Elements
vue-custom-element @angular/elements
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•
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App
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App /
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Web Components
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•
•
•
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•
•
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•
https://developer.mozilla.org/en-US/docs/Web/Web_Components/Using_custom_elements#Using_the_lifecycle_callbacks
•
https://github.com/webcomponents/webcomponentsjs
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innerHTML
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Custom Elements
innerHTML
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HTML Templates
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HTML Templates
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Custom Elements
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Custom Elements
(template).content.cloneNode()
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HTML Templates /
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addEventListener
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querySelector
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innerText
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• DOM API
• DOM API
•
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• DOM API
• DOM API
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HTML Template Instantiation
Appendix
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• DOM API
• DOM API
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HTML Imports
HTML Modules
Appendix
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ES Modules
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lit-html
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lit-html = Template literals
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lit-html
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lit-html
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lit-html
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IDE
Microsoft/typescript-lit-html-plugin
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React
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React
Web Components
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No content
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No content
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REST API
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No content
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No content
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Shadow DOM
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Shadow DOM
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PostCSS
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PostCSS
rollup-plugin-transform-postcss
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Appendix
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No content
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https://ooapp.co/project/LmsLz2a0pAUIHSZBmq3SH2XH
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https://ooapp.co/project/LmsLz2a0pAUIHSZBmq3SH2XH
TypeScript
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connected
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connected
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connectedCallback connected
( )
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disconnectedCallback connected
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( ) Private
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Protected
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render()
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attributeChangedCallback
connected
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attributeChangedCallback
connected
attributeChangedCallback
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connected
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connected
connected
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• ES Class …
•
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customElements.define 1
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Set
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Set
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•
•
• Firebase Realtime Database
http://developer.kaizenplatform.com/entry/tatsuroro/2018-04-19
•
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• React
• HTML Imports PolymerElements/app-route
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• React
• HTML Imports PolymerElements/app-route
…
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Web Components
•
• Polyfill
• ES Modules
• module
• HTML Modules
• Web Components
• Web Components
• Custom Elements
• lit-html
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• Web Components,
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Thank you
ooapp.co/aggre