Peter Lubbers - Pro HTML 5 Programming

■ J
JägerMonkey, 22
JavaScript
coding Web Worker JavaScript file, 197
loading and executing, 195
logging and debugging, 20–21
JavaScript engine, 22
JavaScript methods, to find elements, 18
JavaScript Object Notation (JSON), 21
JSON object storage, 238–239
JSON.parse() function, 239
just-in-time (JIT) compilation engine, 22
■ K
Kaazing WebSocket Gateway, 147
key attribute, 222
key(index) function, 220
■ L
latency, reduction in with WebSockets, 144
latitude coordinates, 88
length attribute, 220
lineCap property, 38
lineTo(x, y) function, 31, 36
list attribute, 178, 187
load() function, 74
loadData() function, 239
loadDemo() function, 61–62, 104–107, 154,
161, 231
localStorage object, 214, 219
location information, 87–91
■ INDEX
cell phone data, 90–91
GPS data, 89–90
IP address-based, 89
latitude and longitude coordinates, 88
privacy issues and, 95
sources of, 88–89
user-defined data, 91
Wi-Fi data, 90
location tracker application
building, with WebSockets, 158–164
adding Geolocation code, 162
adding WebSocket code, 161–162
code listing, 164–167
coding HTML file, 159–160
logging, JavaScript, 20–21
longitude coordinates, 88
long-polling, 138
loop attribute, 75, 84
■ M
manifest attribute, 246
manifest files, 247–251
markup elements
deprecated, 10
new, 9–13
max attribute, 178
maximumAge attribute, 100
maxLength constraint, 188
media controls, 74, 76
277