ajax definition: it can be synchronous / asynchronous server communication is one of technology
ajax language support: JavaScript
ajax features: page does not refresh
ajax benefits: 1, the user experience is good
2, save bandwidth
The use of native ajax
1, the object creating ajax var xhr = newXMLHttpRequest ();
2, sending a request for service
Create a request: xhr.open ( "get", 'URL');
Send Request: xhr.send (null);
3, to accept the server returns information
Set Event: xhr.onreadystaechange = function () {
if(xhr.readystate==4){
document.body.innerhtml += xhr.responsetext;
}
}
4, get and post
Different: a, the number of servers to deliver, get a 2k, post unlimited
b, post security
c, different forms of data transmission, get back in the transfer function of the address in the request string, post the data to form the form out request to the server in the form of xml
jQuery's ajax grammar
.ajax $ ({
of the type:. "prescribed type of request (GET or POST)",
url:. "sending the request URL specified default is the current page",
the Data: {
"provide for the data sent to the server": ""
},
success: function () {
. "function when a request to run a successful";
}
})
ajax definition: it can be synchronous / asynchronous server communication is one of technology
ajax language support: JavaScript
ajax features: page does not refresh
ajax benefits: 1, the user experience is good
2, save bandwidth
The use of native ajax
1, the object creating ajax var xhr = newXMLHttpRequest ();
2, sending a request for service
Create a request: xhr.open ( "get", 'URL');
Send Request: xhr.send (null);
3, to accept the server returns information
Set Event: xhr.onreadystaechange = function () {
if(xhr.readystate==4){
document.body.innerhtml += xhr.responsetext;
}
}
4, get and post
Different: a, the number of servers to deliver, get a 2k, post unlimited
b, post security
c, different forms of data transmission, get back in the transfer function of the address in the request string, post the data to form the form out request to the server in the form of xml
jQuery's ajax grammar
.ajax $ ({
of the type:. "prescribed type of request (GET or POST)",
url:. "sending the request URL specified default is the current page",
the Data: {
"provide for the data sent to the server": ""
},
success: function () {
. "function when a request to run a successful";
}
})