Can someone help me understand the following code? I found it here.
It takes advantage of the JQuery UI Autocomplete with a remote source. I've commented the code as best I can and a more precise question follows it.
$( "#city" ).autocomplete({
source: function( request, response ) {
//request is an objet which contains the user input so far
// response is a callback expecting an argument with the values to autocomplete with
$.ajax({
url: "http://ws.geonames.org/searchJSON", //where is script located
dataType: "jsonp", //type of data we send the script
data: { //what data do we send the script
featureClass: "P",
style: "full",
maxRows: 12,
name_startsWith: request.term
},
success: function( data ) { //CONFUSED!
response(
$.map(
data.geonames, function( item ) {
return {
label: item.name+(item.adminName1 ? ","+item.adminName1:"")+","+item.countryName,
value: item.name
}
}
)
);
}
});
}
});
As you can see, I don't understand the use of the success function and the response callback.
I know the success function literal is an AJAX option which is called when the AJAX query returns. In this case, it seems to encapsulate a call to the response callback? Which is defined where? I thought by definition of a callback, it should be called on its own?
Thanks!
