HTML and CSS Reference
In-Depth Information
EXPLANATION
1 e
json2
library provides methods to encode JavaScript objects to JSON, and de-
code the resulting text back to JavaScript objects. The original json2 library doc-
umentation can be found at json.org/js.html.
2
This function is where the server's response is handled and parsed. The
XML-
HttpRequest
object, called
httpRequest
in this example, was returned from the
functions not listed but found in Example 18.1.
3
The
XMLHttpRequest
object's
responseText
property contains the response from the
server request, a string of text from the “ajaxCar.json” file (see Figure 18.24).
4
The
JSON.parse
method from the
json2
library takes a string and turns it into a
JavaScript object.
5
The special
for
loop is going through all the properties in the
carObject
, retrieving
both properties and values to be placed in the
div
container on line 7.
6
The JSON file will be requested from the server. It has a .json extension. The URL
might be
http://localhost/ajaxCar.json
, depending on your browser.
7
The <
div
> tag is given an
id
called “data”. See Figure 18.25.
Figure 18.24
The JSON string.
