Slide 1
Slide 1 text
Cross-Device Development
with Web Standards
Tomomi Imura
flickr.com/photos/64855052@N00/3967578543/ by Yoichi Nakanishi b
Slide 2
Slide 2 text
H E L L O
M Y N A M E I S
Tomomi
@girlie_mac
02
Slide 3
Slide 3 text
One Web Approach
Mobile Web Best Practices by W3C (2008)
One Web means making, as far as is
reasonable, the same information
and services available to users
irrespective of the device they are
using. ”
“
Mobile Web Best Practices 1.0 (2008)
03
Slide 4
Slide 4 text
Form Factors · Screen Sizes
Slide 5
Slide 5 text
No content
Slide 6
Slide 6 text
No content
Slide 7
Slide 7 text
Adaptive Design
07
Slide 8
Slide 8 text
Adaptive Design
1. Progressive Enhancement
• Enhancing Experiences based on browser
capabilities
• Graceful Degradation - Fallbacks
2. Responsive Design
• Fluid Layout
• Media Queries
• Responsive Images
08
Slide 9
Slide 9 text
Fluid Layout
Neue
flickr.com/photos/meantux/378103724/ by Denis-Carl Robidoux bn
Slide 10
Slide 10 text
Then
• HTML Table Layout (Party like it's 1999)
• The CSS "Holy Grail" Column Liquid Layout
• Float
• Negative margin
• All the hacks that are PITA
• UI Frameworks for Grid Layout
• YUI
• jQuery Masonry
10
Slide 11
Slide 11 text
Now and Future: CSS3 Layouts
• Columns
• Flexible Box ("FlexBox")
• Regions
• Grids
11
Slide 12
Slide 12 text
Fluid Columns
Demo on JSFiddle
12
Slide 13
Slide 13 text
CSS Multi-column Layout Module
.
c
o
l {
-
w
e
b
k
i
t
-
c
o
l
u
m
n
s
: 2
0
0
p
x
;
-
m
o
z
-
c
o
l
u
m
n
s
: 2
0
0
p
x
;
c
o
l
u
m
n
s
: 2
0
0
p
x
;
/
* c
o
l
u
m
n
-
c
o
u
n
t
: a
u
t
o *
/
}
Browser Support:
* 2.1* 3* 7* * 10 11.5p 15Bl*
http://www.w3.org/TR/css3-multicol/
13
Slide 14
Slide 14 text
Flexbox Layout with MQ
Demo on JSFiddle
14
Slide 15
Slide 15 text
CSS Flexible Box Layout Module
#
m
a
i
n {
d
i
s
p
l
a
y
: f
l
e
x
;
f
l
e
x
-
f
l
o
w
: r
o
w
;
} .
.
.
@
m
e
d
i
a a
l
l a
n
d (
m
a
x
-
w
i
d
t
h
: 6
4
0
p
x
) {
#
m
a
i
n {
f
l
e
x
-
f
l
o
w
: c
o
l
u
m
n
;
}
}
Latest syntax:
21* 7* 10* 11 12p 15Bl
http://www.w3.org/TR/css3-flexbox/
15
Slide 16
Slide 16 text
Responsive Regions Layout
Demo on Codepen: http://cdpn.io/LbAFq
16
Slide 17
Slide 17 text
CSS Regions Module
A
1
2
3
4
http://dev.w3.org/csswg/css-regions/
17
Slide 18
Slide 18 text
Responsive Regions Layout
<
d
i
v c
l
a
s
s
=
"
r
e
g
i
o
n r
e
g
i
o
n
1
"
>
<
/
d
i
v
>
<
d
i
v c
l
a
s
s
=
"
r
e
g
i
o
n r
e
g
i
o
n
2
"
>
<
/
d
i
v
> .
.
.
<
a
r
t
i
c
l
e c
l
a
s
s
=
"
c
o
n
t
e
n
t
"
>
c
o
n
t
e
n
t h
e
r
e
.
.
.
<
/
a
r
t
i
c
l
e
>
.
c
o
n
t
e
n
t {
f
l
o
w
-
i
n
t
o
: a
r
t
i
c
l
e
;
}
.
r
e
g
i
o
n {
f
l
o
w
-
f
r
o
m
: a
r
t
i
c
l
e
;
}
@
m
e
d
i
a s
c
r
e
e
n a
n
d (
m
a
x
-
w
i
d
t
h
: 4
0
0
p
x
) {
.
c
o
n
t
e
n
t {
f
l
o
w
-
i
n
t
o
: n
o
n
e
;
}
.
r
e
g
i
o
n {
d
i
s
p
l
a
y
: n
o
n
e
;
}
}
7* 10*
IE10 requires iframe
18
Slide 19
Slide 19 text
Responsive Grid
An arrangement suitable for ‘portrait’ orientation. An arrangement suitable for ‘landscape’ orientation.
10*
http://www.w3.org/TR/css3-grid-layout/
19
Slide 20
Slide 20 text
Media-Queries
http://commons.wikimedia.org/wiki/File:Metric_Volume_Measuring_Vessels_Frontsides-In_use.jpg ba
Slide 21
Slide 21 text
CSS2.1 @media Media-Types
For mobile phones:
@
m
e
d
i
a h
a
n
d
h
e
l
d {
/
* S
o
m
e m
o
b
i
l
e
-
s
p
e
c
i
f
i
c C
S
S h
e
r
e *
/
}
Only supported by:
• Opera Mini
• OpenWave
• Obigo
• PIE (partial)
21
Slide 22
Slide 22 text
CSS3: Media-Queries
allows content rendering to adapt to conditions:
• width of the target viewport
• width of the device's screen size
• screen orientations (landscape v. portrait)
• device pixel ratio (aka. Retina)
etc...
22
Slide 23
Slide 23 text
CSS3: Media-Queries
Separate styles by the width of the target viewport (browser display
area)
@
m
e
d
i
a o
n
l
y s
c
r
e
e
n
a
n
d (
m
i
n
-
w
i
d
t
h : 7
6
8
p
x
)
a
n
d (
m
a
x
-
w
i
d
t
h : 1
0
2
4
p
x
) {
/
* S
t
y
l
e
s *
/
}
23
Slide 24
Slide 24 text
CSS3: Media-Queries
by device-width, the width of the device's screen size
@
m
e
d
i
a o
n
l
y s
c
r
e
e
n
a
n
d (
m
i
n
-
d
e
v
i
c
e
-
w
i
d
t
h : 3
2
0
p
x
)
a
n
d (
m
a
x
-
d
e
v
i
c
e
-
w
i
d
t
h : 4
8
0
p
x
) {
/
* S
t
y
l
e
s *
/
}
24
Slide 25
Slide 25 text
CSS3: Media-Queries
combined with screen orientations
@
m
e
d
i
a o
n
l
y s
c
r
e
e
n
a
n
d (
m
i
n
-
d
e
v
i
c
e
-
w
i
d
t
h : 7
6
8
p
x
)
a
n
d (
m
a
x
-
d
e
v
i
c
e
-
w
i
d
t
h : 1
0
2
4
p
x
)
a
n
d (
o
r
i
e
n
t
a
t
i
o
n : l
a
n
d
s
c
a
p
e
) {
/
* S
t
y
l
e
s *
/
}
.
.
.
25
Slide 26
Slide 26 text
CSS3: Media-Queries
CSS3, Hell Yeah!
@
m
e
d
i
a o
n
l
y s
c
r
e
e
n
a
n
d (
m
a
x
-
w
i
d
t
h
: c
a
l
c
(
7
6
8
p
x - 2
e
m
)
) {
/
* S
t
y
l
e
s *
/
}
.
.
.
26
Slide 27
Slide 27 text
CSS3: Media-Queries
separate styles by device pixel ratio
27
Slide 28
Slide 28 text
High Pixel Density
Displays
Slide 29
Slide 29 text
The High DPI
https://www.webkit.org/blog/55/high-dpi-web-sites/
29
Slide 30
Slide 30 text
30
Slide 31
Slide 31 text
31
Slide 32
Slide 32 text
32
Slide 33
Slide 33 text
33
Slide 34
Slide 34 text
34
Slide 35
Slide 35 text
CSS Pixel vs. Device Pixel
• Pixel in CSS is relative
• 1 CSS pixel != 1 device pixel
35
Slide 36
Slide 36 text
Pixel Density in DOM
w
i
n
d
o
w
.
d
e
v
i
c
e
P
i
x
e
l
R
a
t
i
o
Device Browser Pixel Density
Nexus One Android browser 1.5
Galaxy Nexus Chrome 2.0
Galaxy Nexus Opera Mobile 2.25
Samsung Galaxy S4 Chrome 3.0
36
Slide 37
Slide 37 text
Zoom Dependent Pixel Density
⌘+ and
⌘- , but not for pinch-zoom
Test page (Firefox and Chrome 31+)
37
Slide 38
Slide 38 text
Media-Queries for "Retina"
@
m
e
d
i
a o
n
l
y s
c
r
e
e
n a
n
d (
m
i
n
-
d
e
v
i
c
e
-
p
i
x
e
l
-
r
a
t
i
o
: 2
) {
/
* s
t
y
l
e
s f
o
r h
i
-
D
P
I s
c
r
e
e
n
s *
/
}
38
Slide 39
Slide 39 text
WTF Vendor Prefix!
@
m
e
d
i
a o
n
l
y s
c
r
e
e
n a
n
d (
-
w
e
b
k
i
t
-
m
i
n
-
d
e
v
i
c
e
-
p
i
x
e
l
-
r
a
t
i
o
: 1
.
5
) {
.
.
.
}
@
m
e
d
i
a o
n
l
y s
c
r
e
e
n a
n
d (
m
i
n
-
-
m
o
z
-
d
e
v
i
c
e
-
p
i
x
e
l
-
r
a
t
i
o
: 1
.
5
) {
.
.
.
}
@
m
e
d
i
a o
n
l
y s
c
r
e
e
n a
n
d (
-
o
-
m
i
n
-
d
e
v
i
c
e
-
p
i
x
e
l
-
r
a
t
i
o
: 3
/
2
) {
.
.
.
}
39
Slide 40
Slide 40 text
Unprefix: resolution MQ
@
m
e
d
i
a (
-
w
e
b
k
i
t
-
m
i
n
-
d
e
v
i
c
e
-
p
i
x
e
l
-
r
a
t
i
o
: 2
)
,
(
m
i
n
-
r
e
s
o
l
u
t
i
o
n
: 1
9
2
d
p
i
) {
.
.
.
}
Typical Browser: 96dpi (96 CSS-pixel in 1 CSS-inch)
40
Slide 41
Slide 41 text
...even easier
@
m
e
d
i
a (
-
w
e
b
k
i
t
-
m
i
n
-
d
e
v
i
c
e
-
p
i
x
e
l
-
r
a
t
i
o
: 2
)
,
(
m
i
n
-
r
e
s
o
l
u
t
i
o
n
: 2
d
p
p
x
) {
.
.
.
}
29 16
41
Slide 42
Slide 42 text
CSSOM View Module:
matchMedia()
approaching media-queries in DOM
v
a
r m
q
l = w
i
n
d
o
w
.
m
a
t
c
h
M
e
d
i
a
(
m
e
d
i
a
Q
u
e
r
y
S
t
r
i
n
g
)
;
Browser Support:
9 3 5 10 6 10 12.1p 15Bl
http://dev.w3.org/csswg/cssom-view/#the-mediaquerylist-interface
42
Slide 43
Slide 43 text
v
a
r m
q
l = w
i
n
d
o
w
.
m
a
t
c
h
M
e
d
i
a
(
'
(
o
r
i
e
n
t
a
t
i
o
n
:
l
a
n
d
s
c
a
p
e
)
'
)
;
i
f (
m
q
l
.
m
a
t
c
h
e
s
) {
/
* t
h
e c
u
r
r
e
n
t o
r
i
e
n
t
a
t
i
o
n i
s i
n l
a
n
d
s
c
a
p
e *
/
} e
l
s
e {
/
* p
o
r
t
r
a
i
t *
/
}
43
Slide 44
Slide 44 text
CSS Device Adaptation
<
m
e
t
a n
a
m
e
=
"
v
i
e
w
p
o
r
t
" c
o
n
t
e
n
t
=
"
w
i
d
t
h
=
d
e
v
i
c
e
-
w
i
d
t
h
"
>
↓ CSS
@
v
i
e
w
p
o
r
t {
w
i
d
t
h
: d
e
v
i
c
e
-
w
i
d
t
h
;
}
44
Slide 45
Slide 45 text
CSS Device Adaptation
@
-
o
-
v
i
e
w
p
o
r
t {
w
i
d
t
h
: d
e
v
i
c
e
-
w
i
d
t
h
}
@
-
m
s
-
v
i
e
w
p
o
r
t {
w
i
d
t
h
: d
e
v
i
c
e
-
w
i
d
t
h
} *
@
v
i
e
w
p
o
r
t {
w
i
d
t
h
: d
e
v
i
c
e
-
w
i
d
t
h
}
11P 10
* bug in IE10 - reports in device pixel value
45
Slide 46
Slide 46 text
@viewport in @media
@
m
e
d
i
a s
c
r
e
e
n a
n
d (
o
r
i
e
n
t
a
t
i
o
n
: p
o
r
t
r
a
i
t
) {
@
v
i
e
w
p
o
r
t {
w
i
d
t
h
: 7
6
8
p
x
;
h
e
i
g
h
t
: 1
0
2
4
p
x
;
}
/
* C
S
S f
o
r p
o
r
t
r
a
i
t l
a
y
o
u
t g
o
e
s h
e
r
e *
/
}
46
Slide 47
Slide 47 text
Media Queries Level 4
• "pointer" - accuracy of a pointing device.
• n
o
n
e
• c
o
a
r
s
e aka "fat finger"
• f
i
n
e
• "hover"
• 0
• 1
http://dev.w3.org/csswg/mediaqueries4/#pointer
47
Slide 48
Slide 48 text
Media Queries Level 4
@
m
e
d
i
a (
h
o
v
e
r
) {
.
m
e
n
u l
i
:
h
o
v
e
r {
b
a
c
k
g
r
o
u
n
d
-
c
o
l
o
r
: #
b
a
d
a
5
5
;
}
}
48
Slide 49
Slide 49 text
MQ L4: Range Features
@
m
e
d
i
a (
m
i
n
-
h
e
i
g
h
t
: 6
0
0
p
x
) { .
.
. }
↓
@
m
e
d
i
a (
h
e
i
g
h
t >
= 6
0
0
p
x
) { .
.
. }
http://dev.w3.org/csswg/mediaqueries/#mq-range-context
49
Slide 50
Slide 50 text
MQ L4: Luminosity
@
m
e
d
i
a (
l
u
m
i
n
o
s
i
t
y
: n
o
r
m
a
l
) {
b
o
d
y {
b
a
c
k
g
r
o
u
n
d
-
c
o
l
o
r
: #
d
d
d
; c
o
l
o
r
: #
0
0
0
;
}
}
@
m
e
d
i
a (
l
u
m
i
n
o
s
i
t
y
: d
i
m
) {
b
o
d
y {
b
a
c
k
g
r
o
u
n
d
-
c
o
l
o
r
: #
4
4
4
; c
o
l
o
r
: #
f
f
f
;
}
}
@
m
e
d
i
a (
l
u
m
i
n
o
s
i
t
y
: w
a
s
h
e
d
) {
b
o
d
y {
b
a
c
k
g
r
o
u
n
d
-
c
o
l
o
r
: #
f
f
f
; c
o
l
o
r
: #
3
3
3
;
}
}
http://dev.w3.org/csswg/mediaqueries4/#luminosity
50
Slide 51
Slide 51 text
DOM Ambient Light Events Demo
Video Link: https://vimeo.com/79466285 • Codepen Demo: http://cdpn.io/pvmBs
0:22
51
Slide 52
Slide 52 text
Responsive Images
flickr.com/photos/joaomoura/2348271655/ bna
Slide 53
Slide 53 text
Responsive Images Use Cases
1. Resolution switching
2. Art Direction
3. DPR Switching (High-Res images)
53
Slide 54
Slide 54 text
Resolution switching
54
Slide 55
Slide 55 text
Art-Direction
instead of simple scaling
55
Slide 56
Slide 56 text
DPR Switching: High-Res Images
1x
2x
56
Slide 57
Slide 57 text
Currently used methods
and problems
57
Slide 58
Slide 58 text
Using Media-Queries
@
m
e
d
i
a o
n
l
y s
c
r
e
e
n
a
n
d (
m
i
n
-
d
e
v
i
c
e
-
w
i
d
t
h : 7
6
8
p
x
)
a
n
d (
m
a
x
-
d
e
v
i
c
e
-
w
i
d
t
h : 1
0
2
4
p
x
) {
b
a
c
k
g
r
o
u
n
d
-
i
m
a
g
e
: u
r
l
(
c
a
t
-
t
a
b
l
e
t
.
j
p
g
)
;
w
i
d
t
h
: 6
4
0
p
x
; h
e
i
g
h
t
: 3
2
0
p
x
;
}
@
m
e
d
i
a o
n
l
y s
c
r
e
e
n a
n
d (
m
i
n
-
w
i
d
t
h : 1
2
2
4
p
x
) {
b
a
c
k
g
r
o
u
n
d
-
i
m
a
g
e
: u
r
l
(
c
a
t
-
d
e
s
k
t
o
p
.
j
p
g
)
;
.
.
.
}
58
Slide 59
Slide 59 text
Yay
• Easy enough. No scripts.
Meh
• Hard to figure out MQ Breakpoint
• Not semantic to use b
a
c
k
g
r
o
u
n
d for contents
• Some browsers download all assets (Tests by Tim
Kadlec)
59
Slide 60
Slide 60 text
Fluid Resizing an Image
60
Slide 61
Slide 61 text
Fluid Resizing an Image
Shrink and Stretch without MQ
<
i
m
g s
r
c
=
"
i
m
a
g
e
s
/
r
e
l
a
t
i
v
e
l
y
-
l
a
r
g
e
-
p
h
o
t
o
.
j
p
g
" a
l
t
=
"
c
a
t
"
>
i
m
g {
w
i
d
t
h
: 1
0
0
%
;
h
e
i
g
h
t
: a
u
t
o
;
}
61
Slide 62
Slide 62 text
Yay
• Only one asset
• Easy to implement. No MQ breakpoints needed.
Meh
• CPU intensive
• Westing bandwidth
62
Slide 63
Slide 63 text
Art Direction: Cropping with CSS
https://dl.dropboxusercontent.com/u/1330446/tests/clip.html
63
Slide 64
Slide 64 text
CSS2 Clip Property
<
d
i
v c
l
a
s
s
=
"
i
m
a
g
e
-
c
o
n
t
a
i
n
e
r
"
>
<
i
m
g s
r
c
=
"
i
m
a
g
e
s
/
s
u
s
h
i
-
l
a
r
g
e
.
j
p
g
"
>
<
/
d
i
v
>
.
i
m
a
g
e
-
c
o
n
t
a
i
n
e
r {
p
o
s
i
t
i
o
n
: r
e
l
a
t
i
v
e
;
}
.
i
m
a
g
e
-
c
o
n
t
a
i
n
e
r i
m
g {
p
o
s
i
t
i
o
n
: a
b
s
o
l
u
t
e
;
}
@
m
e
d
i
a o
n
l
y s
c
r
e
e
n a
n
d (
m
a
x
-
w
i
d
t
h
: 4
8
0
p
x
) {
.
i
m
a
g
e
-
c
o
n
t
a
i
n
e
r i
m
g {
c
l
i
p
: r
e
c
t
(
8
0
p
x 2
7
0
p
x 2
7
0
p
x 2
4
0
p
x
)
; /
/ B
L
E
H
!
!
!
}
}
64
Slide 65
Slide 65 text
CSS2 Clip Property
p
o
s
i
t
i
o
n
: a
b
s
o
l
u
t
e
;
c
l
i
p
: r
e
c
t
(
t
o
p r
i
g
h
t b
o
t
t
o
m l
e
f
t
)
;
Photo: http://www.flickr.com/photos/nicolelee/1798352472/ by Nicole Lee bna
65
Slide 66
Slide 66 text
Yay
• Only one asset
Meh
• CSS clip is cumbersome
• Westing bandwidth
66
Slide 67
Slide 67 text
Up-Res for Hi-DPI Screens
67
Slide 68
Slide 68 text
Up-Res Images with MQ
.
b
a
n
n
e
r {
b
a
c
k
g
r
o
u
n
d
-
i
m
a
g
e
: u
r
l
(
b
a
n
n
e
r
.
p
n
g
)
;
w
i
d
t
h
: 3
2
0
p
x
; h
e
i
g
h
t
: 1
6
0
p
x
;
}
@
m
e
d
i
a (
-
w
e
b
k
i
t
-
m
i
n
-
d
e
v
i
c
e
-
p
i
x
e
l
-
r
a
t
i
o
: 2
)
,
(
m
i
n
-
r
e
s
o
l
u
t
i
o
n
: 2
d
p
p
x
) {
.
b
a
n
n
e
r {
b
a
c
k
g
r
o
u
n
d
-
i
m
a
g
e
: u
r
l
(
b
a
n
n
e
r
-
2
x
.
p
n
g
)
;
b
a
c
k
g
r
o
u
n
d
-
s
i
z
e
: 1
0
0
%
;
}
}
68
Slide 69
Slide 69 text
Yay
• Simple enough to implement
Meh
• Browser-dependent MQ data types / prefix
• Not semantic to use b
a
c
k
g
r
o
u
n
d for contents
• Some browsers download all assets (Tests by Tim
Kadlec)
69
Slide 70
Slide 70 text
Up-Res with CSS image-set()
<
d
i
v i
d
=
"
p
h
o
t
o
0
1
"
>
<
/
d
i
v
>
#
p
h
o
t
o
0
1 {
w
i
d
t
h
: 3
0
0
p
x
; h
e
i
g
h
t
: 2
0
0
p
x
;
b
a
c
k
g
r
o
u
n
d
-
i
m
a
g
e
: u
r
l
(
i
m
a
g
e
s
/
l
o
w
r
e
s
.
j
p
g
)
;
b
a
c
k
g
r
o
u
n
d
-
i
m
a
g
e
:
-
w
e
b
k
i
t
-
i
m
a
g
e
-
s
e
t
(
u
r
l
(
i
m
a
g
e
s
/
l
o
w
r
e
s
.
j
p
g
) 1
x
,
u
r
l
(
i
m
a
g
e
s
/
h
i
r
e
s
.
j
p
g
) 2
x
)
;
}
6* 19* 15bl*
CSS Image Values and Replaced Content Module Level 4
70
Slide 71
Slide 71 text
Yay
• Less hassle syntax
Meh
• Not enough browser supports. Spec is unstable.
• Not semantic to use b
a
c
k
g
r
o
u
n
d for contents
71
Slide 72
Slide 72 text
Vector Graphics FTW!
72
Slide 73
Slide 73 text
SVG
<
i
m
g s
r
c
=
"
l
o
g
o
.
s
v
g
" w
i
d
t
h
=
"4
3
2 "
>
73
Slide 74
Slide 74 text
Web Font Icons
36px 72px 108px
144px 288px
IcoMoon
74
Slide 75
Slide 75 text
Web Font Icons
<
s
p
a
n d
a
t
a
-
i
c
o
n
=
"
&
#
x
e
0
0
0
;
"
>
f
o
r
k m
e
<
/
s
p
a
n
>
@
f
o
n
t
-
f
a
c
e {
f
o
n
t
-
f
a
m
i
l
y
: '
i
c
o
n
s
'
;
s
r
c
: u
r
l
(
'
f
o
n
t
s
/
i
c
o
n
s
.
w
o
f
f
'
) f
o
r
m
a
t
(
'
w
o
f
f
'
)
;
}
[
d
a
t
a
-
i
c
o
n
]
:
:
b
e
f
o
r
e {
f
o
n
t
-
f
a
m
i
l
y
: '
i
c
o
n
s
'
;
c
o
n
t
e
n
t
: a
t
t
r
(
d
a
t
a
-
i
c
o
n
)
;
f
o
n
t
-
s
i
z
e
: 7
2
p
x
;
}
75
Slide 76
Slide 76 text
Other Solutions
• Javascript
• Mobify.js etc.
• Polyfills (Picturefill.js, x-picture/Polymer)
• Server-side
• "Adaptive Images" (PHP)
• Sencha.io Src (UA lookup in Cloud)
• Creative Hacks
• Clown Car Technique
76
Slide 77
Slide 77 text
Responsive ![]()
?
77
Slide 78
Slide 78 text
O NOES! ![]()
was not made for the
responsive design!
78
Slide 79
Slide 79 text
We need a standard solution.
... or a few.
79
Slide 80
Slide 80 text
The srcset attribute
Proposal by Apple & adopted by WhatWG
<
i
m
g a
l
t
=
"
T
h
e B
r
e
a
k
f
a
s
t C
o
m
b
o
"
s
r
c
=
"
b
a
n
n
e
r
.
j
p
e
g
"
s
r
c
s
e
t
=
"
b
a
n
n
e
r
-
H
D
.
j
p
e
g 2
x
,
b
a
n
n
e
r
-
p
h
o
n
e
.
j
p
e
g 1
0
0
w
,
b
a
n
n
e
r
-
p
h
o
n
e
-
H
D
.
j
p
e
g 1
0
0
w 2
x
"
>
WebKit Nightly r154002
The srcset attribute - An HTML extension for adaptive images
80
Slide 81
Slide 81 text
Picture Element
Proposal RespImg CG
<
p
i
c
t
u
r
e w
i
d
t
h
=
"
5
0
0
" h
e
i
g
h
t
=
"
5
0
0
"
>
<
s
o
u
r
c
e m
e
d
i
a
=
"
(
m
i
n
-
w
i
d
t
h
: 4
5
e
m
)
" s
r
c
=
"
l
a
r
g
e
.
j
p
g
"
>
<
s
o
u
r
c
e m
e
d
i
a
=
"
(
m
i
n
-
w
i
d
t
h
: 1
8
e
m
)
" s
r
c
=
"
m
e
d
.
j
p
g
"
>
<
s
o
u
r
c
e s
r
c
=
"
s
m
a
l
l
.
j
p
g
"
>
<
i
m
g s
r
c
=
"
f
a
l
l
b
a
c
k
.
j
p
g
"
>
<
p
>
A
c
c
e
s
s
i
b
l
e t
e
x
t
<
/
p
>
<
/
p
i
c
t
u
r
e
>
Responsive Images Community Group
81
Slide 82
Slide 82 text
HTTP Client-Hints
Proposal from Google: let the server selects the right asset
[
R
e
q
u
e
s
t
]
G
E
T /
k
i
t
t
e
n
.
j
p
g H
T
T
P
/
1
.
1
U
s
e
r
-
A
g
e
n
t
: .
.
.
A
c
c
e
p
t
: i
m
a
g
e
/
w
e
b
p
, i
m
a
g
e
/
j
p
g
C
H
: d
p
r
=
2
.
0
http://www.igvita.com/2013/08/29/automating-dpr-switching-with-client-hints/
82
Slide 83
Slide 83 text
What's
Next?
http://www.flickr.com/photos/barbostick/3581760713/ ba
Slide 84
Slide 84 text
Smart TV
W3C: Web and TV Interest Group
Panasonic Viera Smart TV
84
Slide 85
Slide 85 text
Automotive
proposals for standardizing HTML5-based
vehicle APIs:
• Tizen
• Webinos
• GENIVI
• QNX
W3C: Automotive and Web Platform Business Group
QNX Auto Blog
85
Slide 86
Slide 86 text
Wearable Devices & IoT
http://imgur.com/g/memes/qKH2tM8
86
Slide 87
Slide 87 text
Thank you!
Tomomi Imura
• @girlie_mac
• girliemac.com
• github.com/girliemac
• speakerdeck.com/girlie_mac
Slide: http://girliemac.github.io/presentation-slides/html5-mobile-
approach/rwd.html
87
Slide 88
Slide 88 text
88