what is it : It is JSON with some paddind
ex: JSON: {"name","sreenath"}
JSONP: my({"name","sreenath"})
in the above 'my ( )' is padding
Why[Usage]: To over come problem of same domain origin policy restriction of AJAX [ you cant make a AJAX call to different domain].
How it works:
Its all possible with one condition. < script > tag can access resources in different domain
1.You make request to cross domain resource using script tag passing call back function name.
< script src="htt://mydomain.com/resource?callback=mycallbackfunc"/>
2. Make your server side code to return passed function with data.
mycallbackfunc(JSON DATA) ex: mycallbackfunc({"name","sreenath"})
3. implement your call back funcion in your client side code
function mycallbackfunc(data){
// write your logic here
}
That is it you have done cross domain request.
Limitations:
1. You can not make POST request with this
2. server side code needs to be written to return JSONP data
