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The Web Component Ecosystem
A wonderful world of Web Components
Rob Dodson
Brazil - Aug, 2014
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+RobDodson
@rob_dodson
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Agenda
Web Components: Overview
The ecosystem
Join the revolution
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Web Components: Overview
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What problems are we solving?
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!
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http://drbl.in/esYL
Building UI tabs
should be easy!
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KNOWLEDGE
HISTORY
FOOD
Less markup. Less JS. Less confusion.
Web Components
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How do they work?
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36
Browser support
Summer 2014
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Layers ·
sugaring
·
polymer.js: declarative, data-binding,
·
property observation, gestures, …)
·
components
·
core elements, paper elements
·
polyfills
·
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Browser support
Summer 2014 (with Polymer)
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Browser support
Summer 2014 (with Polymer)
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Custom Elements
define new HTML/DOM elements
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Tab 1
Tab 2
Tab 3
declarative, readable
meaningful HTML
common way to extend → reusable
Custom Elements
define new HTML
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declarative, readable
meaningful HTML
common way to extend → reusable
Custom Elements
define new HTML
var tabs = document.querySelector('paper-tabs');
tabs.addEventListener('core-activate', function() {
console.log(this.selected);
});
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document.registerElement(‘paper-tabs’, {
prototype: Object.create(HTMLElement.prototype)
});
vanilla
polymer
…
usage …
// document.createElement(‘paper-tabs’);
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document.registerElement(‘paper-tabs’, {
prototype: Object.create(HTMLElement.prototype)
});
vanilla
polymer
…
usage …
// document.createElement(‘paper-tabs’);
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document.registerElement(‘paper-tabs’, {
prototype: Object.create(HTMLElement.prototype)
});
vanilla
polymer
…
usage …
// document.createElement(‘paper-tabs’);
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document.registerElement(‘paper-tabs’, {
prototype: Object.create(HTMLElement.prototype)
});
vanilla
polymer
…
usage …
// document.createElement(‘paper-tabs’);
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Templates
native client-side templating
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Shadow DOM
DOM/CSS scoping
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Actually Shadow DOM
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var shadow = el.createShadowRoot();
shadow.innerHTML = “h2 { color: red; }” +
“
I’m a profile-card
”; vanilla polymerI’m a profile-card
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var shadow = el.createShadowRoot();
shadow.innerHTML = “h2 { color: red; }” +
“
I’m a profile-card
”; vanilla polymerI’m a profile-card
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var shadow = el.createShadowRoot();
shadow.innerHTML = “h2 { color: red; }” +
“
I’m a profile-card
”; vanilla polymerI’m a profile-card
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html5rocks.com/en/tutorials/webcomponents/shadowdom
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HTML Imports
loading web components
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Custom Elements
Create new HTML elements and extend existing ones
Templates
Native templating in the browser
Shadow DOM
Scoped CSS!!! + encapsulated markup
HTML Imports
Load custom element definitions and resources
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The ecosystem
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Elements
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!
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!
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What if we designed HTML
for the mobile web?
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http://bit.ly/1jkTo5c
core-elements
Image:
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Visual
Non-visual
And many more…
Image: http://bit.ly/1kuX889,
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A basic container for controls
like tabs or buttons
MY APP
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A basic container for controls
like tabs or buttons
MY APP
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MY APP
A basic container for controls
like tabs or buttons
MY APP
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MY APP
A basic container for controls
like tabs or buttons
MY APP
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A simple container with a header
section and a content section
MY APP
…
MY APP
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A simple container with a header
section and a content section
MY APP
…
MY APP
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A simple container with a header
section and a content section
MY APP
…
MY APP
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A simple container with a header
section and a content section
MY APP
…
MY APP
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MY APP
…
Toolbar will scroll with the page
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A responsive container that
combines a left- or right-side drawer
panel and a main content area.
Drawer panel...
Main panel...
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Drawer panel...
Main panel...
A responsive container that
combines a left- or right-side drawer
panel and a main content area.
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Drawer panel...
Main panel...
A responsive container that
combines a left- or right-side drawer
panel and a main content area.
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Material design
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Preview @ Google I/O
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paper-elements
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polymer-project.org/apps/topeka/
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polymer-project.org
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We’re not alone
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Mozilla Brick
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brick-appbar
brick-deck
brick-tabbar
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core-icon
x-instagram
(not shown)
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Web Components
can work together
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Not just browser makers
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…?
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github.com/mvaldetaro/twbs-grid
.bs-col-md-8
.bs-col-md-4
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github.com/erikringsmuth/app-router
my-site.com/order/:id
!
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github.com/addyosmani/page-er
>">
!
var pager = document.querySelector("page-er");
document.addEventListener("polymer-ready", function() {
pager.data = model.items;
});
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github.com/garstasio/ajax-form
Full Name
Country City
Join newsletter
√
Full Name
…
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Apps
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polymer-project.org
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chromestatus.com
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polymer-project.org/tools/designer/
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APIs
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APIs (as elements)
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I want to add a marker
to a Google map.
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#map {
height: 400px;
}
!
!
var marker = null;
function getCurrentLocation(callback) {
navigator.geolocation.watchPosition(callback);
}
!
function addMarker(opts, info) {
var marker = new google.maps.Marker(opts);
!
var infoWindow = new google.maps.InfoWindow({content: info});
!
google.maps.event.addListener(marker, 'click', function() {
infoWindow.open(opts.map, marker);
});
!
return marker;
}
!
function mapReady() {
var container = document.querySelector('#map');
var map = new google.maps.Map(container, {
zoom: 14, disableDefaultUI: true
});
getCurrentLocation(function(pos) {
var current = new google.maps.LatLng(pos.coords.latitude,
pos.coords.longitude);
map.setCenter(current);
!
// Re-position marker or create new one.
if (marker) {
marker.setPosition(map.getCenter());
} else {
marker = addMarker({
position: current, map: map, title: 'Your location'
}, '<b>Your location</b>');
}
});
}
So much code for
one map marker!
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googlewebcomponents.github.io
github.com/GoogleWebComponents
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youtube.com/watch?v=eORqFaf_QzM
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github.com/ForceDotComLabs/mobile-ui-elements
github.com/ForceDotComLabs
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Join the revolution
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Learn
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polymer-project.org
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Build
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YO ELEMENT
npm install -g generator-element
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YO POLYMER
npm install -g generator-polymer
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Start with
github.com/PolymerLabs/seed-element
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youtube.com/watch?v=2toYLLcoY14
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Share!
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customelements.io
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{
"name": "my-element",
"version": "0.0.0",
"description": "My awesome Custom Element",
"license": "MIT",
"keywords": [
"web-components"
],
"ignore": [
"**/.*",
"node_modules",
"bower_components"
]
}
bower.json
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EXPLORE
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+RobDodson
@rob_dodson