Head First Ajax

for the cover images......Page 185
If you need new behavior, you probably need a new event handler function......Page 190
With ONE request object, you can safely send and receive ONE asynchronous request......Page 199
Asynchronous requests don\'t wait on anything... including themselves!......Page 200
If you\'re making TWO separate requests, use TWO separate request objects......Page 201
Asynchrony means you can\'t count on the ORDERING of your requests and responses......Page 207
A monitor function MONITORS your application... from OUTSIDE the action......Page 212
You call a monitor function when action MIGHT need to be taken......Page 213
Status variables let monitors know what\'s going on......Page 215
And now for our last trick.........Page 219
Synchronous requests block ALL YOUR CODE from doing anything......Page 221
Use setInterval() to let JavaScript run your process, instead of your own code......Page 224
the document object model......Page 233
You can change the CONTENT of a page.........Page 234
...or you can change the STRUCTURE of a page......Page 235
Browsers use the Document Object Model to represent your page......Page 236
Here\'s the XHTML that you write.........Page 238
...and here\'s what your browser sees......Page 239
Your page is a set of related objects......Page 241
Let\'s use the DOM to build a dynamic app......Page 248
You start with XHTML.........Page 250
appendChild() adds a new child to a node......Page 259
You can locate elements by name or by id......Page 260
Interiew with a new parent......Page 263
Can I move the clicked tile?......Page 264
You can move around a DOM tree using FAMILY relationships......Page 266
A DOM tree has nodes for EVERYTHING in your web page......Page 276
The nodeName of a text node is \"#text\"......Page 278
Did I win? Did I win?......Page 282
But seriously... did I win?......Page 283
manipulating the DOM......Page 288
Webville Puzzles... the franchise......Page 289
Woggle doesn\'t use table cells for the tiles......Page 293
The tiles in the XHTML are CSS-positioned......Page 294
\"We don\'t want TOTALLY random letters...\"......Page 296
Our presentation is ALL in our CSS......Page 298
We need a new event handler for handling tile clicks......Page 300
We can assign an event handler in our randomizeTiles() function......Page 301
Property values are just strings in JavaScript......Page 302
Use the DOM to change a page\'s structure......Page 305
Use createElement() to create a DOM element......Page 306
You have to TELL the browser where to put any new DOM nodes you create......Page 307
...AND turning OFF the addLetter() event handler......Page 315
Our JavaScript doesn\'t care how the server figures out its response to our request......Page 317
Usability check: WHEN can submitWord() get called?......Page 322
frameworks and toolkits......Page 335
So what frameworks ARE there?......Page 341
Every framework uses a different syntax to do things......Page 342
The syntax may change... but the JavaScript is still the same......Page 343
To framework or not to framework?......Page 346
The choice is up to you.........Page 348
xml requests and responses......Page 350
Classic rock gets a 21st century makeover......Page 351
How should a server send a MULTI-valued response?......Page 354
innerHTML is only simple for the CLIENT side of a web app......Page 360
You use the DOM to work with XML, just like you did with XHTML......Page 366
XML is self-describing......Page 373
json......Page 386
JSON can be text AND an object......Page 388
JSON data can be treated as a JavaScript object......Page 389
So how do we get JSON data from the server\'s response?......Page 390
Use eval() to manually evaluate text......Page 392
Evaluating JSON data returns an object representation of that data......Page 393
JavaScript objects are ALREADY dynamic... because they\'re not COMPILED objects......Page 399
You can access an object\'s members... and then get an object\'s values with those members......Page 400
You need to PARSE the server\'s response, not just EVALUATE it......Page 406
forms and validation......Page 415
Validation should work from the web page BACK to the server......Page 422
You can validate the FORMAT of data, and you can validate the CONTENT of data......Page 428
Don\'t Repeat Yourself: DRY......Page 431
Let\'s build some more event handlers......Page 434
The value of a property can be another JavaScript object......Page 438
Let\'s warn Marcy\'s customers when there\'s a problem with their entry......Page 441
IF there\'s a warning, get rid of it......Page 445
Duplicate data is a SERVER problem......Page 451
post requests......Page 454
GET requests send request parameters across the network as clear text......Page 458
POST requests DON\'T send clear text......Page 459
The data in a POST request is ENCODED until it reaches the server......Page 461
send() your request data in a POST request......Page 463
Always check to make sure your request data was RECEIVED.......Page 465
Why didn\'t the POST request work?......Page 467
The server unencodes POST data......Page 468
We need to TELL the server what we\'re sending......Page 469
Set a request header using setRequestHeader() on your request object......Page 471