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Building a Better Web with
Web Components and Polymer 2.0
Henry Lim @henrylim96
Google Developer Group Kuala Lumpur
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web components
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safari
supports
web components
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1B +
mobile devices natively support
web components
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// Time to show some code
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// Time to show some code
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class MyElement extends HTMLElement {
}
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class MyElement extends HTMLElement {
}
customElements.define('my-element', MyElement);
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Shadow DOM
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class MyElement extends HTMLElement {
constructor(){
super();
this.attachShadow({mode:'open'}).innerHTML =
'Web Components are native! '
}
}
customElements.define('my-element', MyElement);
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Polymer
Web Components are awesome!
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2
BILLIONS
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Source: McDonald's Singapore, https://youtu.be/xZU58r01BOw
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Native Browser Support
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Native Browser Support
ES6 Classes ✔ ✔ ✔ ✔
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Native Browser Support
ES6 Classes ✔ ✔ ✔ ✔
Custom Elements ✔ ✔
Shadow DOM ✔ ✔
CSS Custom Properties ✔ ✔ ✔ ✔
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Native Browser Support
ES6 Classes ✔ ✔ ✔ ✔
Custom Elements ✔ ✔
Shadow DOM ✔ ✔
CSS Custom Properties ✔ ✔ ✔ ✔
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Native Browser Support
ES6 Classes ✔ ✔ ✔ ✔ Transpile
Custom Elements ✔ ✔ Polyfill Polyfill Polyfill
Shadow DOM ✔ ✔ Polyfill Polyfill Polyfill
CSS Custom Properties ✔ ✔ ✔ ✔ Polyfill
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Native Browser Support
ES6 Classes ✔ ✔ ✔ ✔ Transpile
Custom Elements ✔ ✔ Polyfill Polyfill Polyfill
Shadow DOM ✔ ✔ Polyfill Polyfill Polyfill
CSS Custom Properties ✔ ✔ ✔ ✔ Polyfill
Polymer 2.0 + Polyfill Size 11k 14k 33k 33k 37k
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Polymer 2.0 + Polyfill Size 11k 14k 33k 33k 37k
Polymer 1.9 + Polyfill Size 40k 53k 53k 53k 53k
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¼
the size of Polymer 1.0
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webcomponents.org
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IDE Plugins
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Polymer CLI
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PRPL
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Push critical resources for the initial URL route.
Render initial route.
Pre-cache remaining routes.
Lazy-load and create remaining routes on demand.
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App Toolbox
polymer-project.org/2.0/toolbox/
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POLYMER NEWS
Progressive Web App Template
news.polymer-project.org
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Web Components
Polymer Library
Tooling
PRPL
App Toolbox
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Shadow DOM
DOM templating
Data binding
Gesture events
Custom CSS properties
and more ...
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Can I use Polymer with X
framework/library?
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Thank you !
Henry Lim @henrylim96
Google Developer Group Kuala Lumpur