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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