jQuery ajax() Metode
Voorbeeld
Verander die teks van 'n <div>-element deur 'n AJAX-versoek te gebruik:
$("button").click(function(){
$.ajax({url: "demo_test.txt", success: function(result){
$("#div1").html(result);
}});
});
Definisie en gebruik
Die ajax() metode word gebruik om 'n AJAX (asynchrone HTTP) versoek uit te voer.
Alle jQuery AJAX metodes gebruik die ajax() metode. Hierdie metode word meestal gebruik vir versoeke waar die ander metodes nie gebruik kan word nie.
Sintaksis
$.ajax({name:value, name:value, ... })
Die parameters spesifiseer een of meer naam/waarde-pare vir die AJAX-versoek.
Moontlike name/waardes in die tabel hieronder:
Name | Value/Description |
---|---|
async | A Boolean value indicating whether the request should be handled asynchronous or not. Default is true |
beforeSend(xhr) | A function to run before the request is sent |
cache | A Boolean value indicating whether the browser should cache the requested pages. Default is true |
complete(xhr,status) | A function to run when the request is finished (after success and error functions) |
contentType | The content type used when sending data to the server. Default is: "application/x-www-form-urlencoded" |
context | Specifies the "this" value for all AJAX related callback functions |
data | Specifies data to be sent to the server |
dataFilter(data,type) | A function used to handle the raw response data of the XMLHttpRequest |
dataType | The data type expected of the server response. |
error(xhr,status,error) | A function to run if the request fails. |
global | A Boolean value specifying whether or not to trigger global AJAX event handles for the request. Default is true |
ifModified | A Boolean value specifying whether a request is only successful if the response has changed since the last request. Default is: false. |
jsonp | A string overriding the callback function in a jsonp request |
jsonpCallback | Specifies a name for the callback function in a jsonp request |
password | Specifies a password to be used in an HTTP access authentication request. |
processData | A Boolean value specifying whether or not data sent with the request should be transformed into a query string. Default is true |
scriptCharset | Specifies the charset for the request |
success(result,status,xhr) | A function to be run when the request succeeds |
timeout | The local timeout (in milliseconds) for the request |
traditional | A Boolean value specifying whether or not to use the traditional style of param serialization |
type | Specifies the type of request. (GET or POST) |
url | Specifies the URL to send the request to. Default is the current page |
username | Specifies a username to be used in an HTTP access authentication request |
xhr | A function used for creating the XMLHttpRequest object |
Probeer dit self - voorbeelde
Hoe om die asinkronisering-instelling te gebruik om 'n sinchrone versoek te spesifiseer
Hoe om die dataType-instelling te gebruik om die datatipe vir die versoek te spesifiseer.
Hoe om die foutinstelling te gebruik om foute in 'n AJAX-versoek te hanteer.