Basic usage of .ajax
would look something like this:
HTML:
<form id="foo"> <label for="bar">A bar</label> <input id="bar" name="bar" type="text" value="" /> <input type="submit" value="Send" /> </form>
jQuery:
// Variable to hold request var request; // Bind to the submit event of our form $("#foo").submit(function(event){ // Prevent default posting of form - put here to work in case of errors event.preventDefault(); // Abort any pending request if (request) { request.abort(); } // setup some local variables var $form = $(this); // Let's select and cache all the fields var $inputs = $form.find("input, select, button, textarea"); // Serialize the data in the form var serializedData = $form.serialize(); // Let's disable the inputs for the duration of the Ajax request. // Note: we disable elements AFTER the form data has been serialized. // Disabled form elements will not be serialized. $inputs.prop("disabled", true); // Fire off the request to /form.php request = $.ajax({ url: "/form.php", type: "post", data: serializedData }); // Callback handler that will be called on success request.done(function (response, textStatus, jqXHR){ // Log a message to the console console.log("Hooray, it worked!"); }); // Callback handler that will be called on failure request.fail(function (jqXHR, textStatus, errorThrown){ // Log the error to the console console.error( "The following error occurred: "+ textStatus, errorThrown ); }); // Callback handler that will be called regardless // if the request failed or succeeded request.always(function () { // Reenable the inputs $inputs.prop("disabled", false); }); });
Note: Since jQuery 1.8, .success()
, .error()
and .complete()
are deprecated in favor of .done()
, .fail()
and .always()
.
Note: Remember that the above snippet has to be done after DOM ready, so you should put it inside a $(document).ready()
handler (or use the $()
shorthand).
Tip: You can chain the callback handlers like this: $.ajax().done().fail().always();
PHP (that is, form.php):
// You can access the values posted by jQuery.ajax // through the global variable $_POST, like this: $bar = isset($_POST['bar']) ? $_POST['bar'] : null;
Note: Always sanitize posted data, to prevent injections and other malicious code.
You could also use the shorthand .post
in place of .ajax
in the above JavaScript code:
$.post('/form.php', serializedData, function(response) { // Log the response to the console console.log("Response: "+response); });
Note: The above JavaScript code is made to work with jQuery 1.8 and later, but it should work with previous versions down to jQuery 1.5.