[A] AJAX + ML + DTD concept
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Scenes:
Synchronous Asynchronous:
Most operations are asynchronous AJAX
status:
&& HTTP status code reading state
Related attributes:
Package:
Expand Note:
XML drawback: the old version of the data type, the case of the same amount of data, XML file format than JSON file size a lot .. ..
Caching: caching based on URL, if the URL unchanged, it will have been cached.
eval function: string in JS content analysis can identify a code,
The essential difference:
Performance difference:
After the GET data transmission limitations, small capacity, restrictions on the nature of the browser's URL (4-10K), not suitable for transferring large data
POST data transmission capacity, about 2G
If you want real security, you need to take https secure transfer protocol
The main difference:
.