creating mobile applications using html5

Creating Mobile Applications using HTML5Developers Track

David Orchard: salesforce.com

Paolo Bergamo: salesforce.com

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Agenda

Where is mobile going

HTML5

Different approaches

Demos

Where is mobile

going?

Mobile Internet

Morgan Stanley “Internet Trends”, December 2009

Explosive growth in the mobile web

Mobile sites are a viable option for apps

100% Year/Year growth in mobile

browser traffic

Capable browsers, compelling

experiences

Source: Quantcast, 2010

Proliferation of mobile: two dimensions

Mobile browsers are slowly converging

HTML5

Truly crossplatform

Rich content: <video>, <audio>, <canvas>

Offline storage

Cache Manifest

Location

Websocket

Friends of HTML5

JavaScript

CSS3

Device API Working Group

– Contacts, Calendar, Media Capture(API/HTML forms), …

Cross Origin Resource Sharing (CORS)

– JSONP replacement

CSS

Wonderful for mobile

Animations

Borders, Shading, Gradients

Text styling

Example

– Text sizes, styles, etc. different across form factors

– Could calculate truncation on server, or native/javascript

– Use CSS for 1 style across all devices FTW!

HTML5

HTML 5 and Friends Reality in Mobile

Incomplete specifications and implementation

Security challenges

Authentication

Secure storage

UI performance – notably scrolling

Different webKit version per OS and platform

Hard to find features per build per OS

Ie, iOS webKit ! CSS 2.1 position:fixed

Web vs Native

Feature Web Native

Install/Update Refresh Deploy/Download

Animation Slower to almost Native Fast

Dev environment Browser, Web tools OS specific

Dev languages HTML, CSS, Javascript Obj-C|Java|C#|…

Distribution Publish Approval by App store

Collect icons on device Yes Yes

Monetization Ads, Exchanges,

Payment providers

App stores + Web

Popularity Rankings Analytics,

Platforms (facebook)

App Store

Hybrid applications

Native app from non-native language

PhoneGap

Rhomobile

Appcelerator Titanium

Lua

…

PhoneGap

Open Source

Native app embedding webKit

HTML5, Javascript, CSS

Cross Platform

Installable Apps

Native code/functionality accessible from Javascript

Core APIs

Contacts

Geo

Accelerometer

Device

File I/O

Network

Camera

Events

Notifications

Mix and Match

By definition, PhoneGap is mixture

Also use native compents

Tab bar, ChildBrowser, TableView

Native apps often use embedded browser

– Chatter for iPhone: UIWebView for feedItems

– Salesforce.com iPhone/Blackberry app

• Dashboards, VisualForce pages

Different architectures

#1: Hosted Web + Salesforce.com proxy

Acme corporate

network

#2: Hosted Web + API to Salesforce.com

Acme corporate

network

Salesforce is mobile-ready

Mobile-ready login page

Oauth support

Building a native container

Pure browser applications

cannot yet take advantage of

features available to mobile:

Picture upload

Security

Consider a Hybrid

#3: Native+HTML5 to Salesforce or Host

Acme corporate

network

#4: Salesforce Hosted

Salesforce Mobile and Visualforce Mobile

Visualforce

<apex:page id="thePage”>

<script> function changeFont(input, textid) {

if(input.checked)

document.getElementById(textid).style.fontWeight = "bold"; else

document.getElementById(textid).style.fontWeight = "normal"; }

</script>

...

Visualforce Mobile

Embedded browser (no need to authenticate)

Bridge between native client and browser

Enables GPS location, picture upload etc

Summary

Summary

Mobile growing rapidly in usage and capabilities

HTML5 and friends maturing quickly

4 Different architectures for mobile HTML5

Hybrid very interesting and potentially important

Thank you!

Creating Mobile Applications using

HTML5

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