For some reason, Firefox is throwing "function not defined" errors at this piece of JS:
$(function() { // on document ready
function updateAlerts() {
$.ajax({
url : "/check.php",
type : "POST",
data : {
method : 'checkAlerts'
},
success : function(data, textStatus, XMLHttpRequest) {
var response = $.parseJSON(data);
// Update the DOM to show the new alerts!
if (response.friendRequests > 0) {
// update the number in the DOM and make sure it is visible...
$('#notifications').show().text(response.friendRequests);
}
else {
// Hide the number, since there are no pending friend requests or messages
var ablanknum = '0';
$('#notifications').show().text(ablanknum);
}
}
});
}
function friendRequestAlert() {
$.ajax({
url : "/check.php",
type : "POST",
data : {
method : 'sendFriendAlert'
},
success : function(data, textStatus, XMLHttpRequest) {
var response = $.parseJSON(data);
if (response.theFRAlert !== '0') {
// Display our fancy Javascript notification.
$.jgrowl('' + response.theFRAlert + '');
}
}
});
}
function messageAlert() {
$.ajax({
url : "/check.php",
type : "POST",
data : {
method : 'sendMessageAlert'
},
success : function(data, textStatus, XMLHttpRequest) {
var response = $.parseJSON(data);
if (response.theAlert !== '0') {
// Display our fancy Javascript notification.
$.jgrowl('' + response.theAlert + '');
$('#therearemessages').show().text(response.theAlert);
}
}
});
}
});
I checked through my code and nothing seems to be wrong.
There is no reason to wrap your 3 functions in the document ready wrapper--nothing inside those functions (which may rely on the doc being ready) is executed until they are called. Further, by wrapping them in doc ready, you're forcing them into the scope of that anon function and they cannot be used from outside of it.
Unrelated, you should set your dataType to 'json' on the $.ajax calls and stop making manual calls to $.parseJSON.
New code:
function updateAlerts()
{
$.ajax( {
url: '/check.php',
type: 'POST',
data: {
method: 'checkAlerts'
},
dataType: 'json',
success: function( response )
{
// Update the DOM to show the new alerts!
if( response.friendRequests > 0 )
{
// update the number in the DOM and make sure it is visible...
$( '#notifications' ).show().text( response.friendRequests );
}
else
{
// Hide the number, since there are no pending friend requests or messages
var ablanknum = '0';
$( '#notifications' ).show().text( ablanknum );
}
}
} );
}
function friendRequestAlert()
{
$.ajax( {
url: '/check.php',
type: 'POST',
data: {
method: 'sendFriendAlert'
},
dataType: 'json',
success: function( response )
{
if( response.theFRAlert !== '0' )
{
// Display our fancy Javascript notification.
$.jgrowl('' + response.theFRAlert + '');
}
}
} );
}
function messageAlert()
{
$.ajax( {
url: '/check.php',
type : 'POST',
data: {
method : 'sendMessageAlert'
},
dataType: 'json',
success: function( response )
{
if( response.theAlert !== '0' )
{
// Display our fancy Javascript notification.
$.jgrowl('' + response.theAlert + '');
$('#therearemessages').show().text(response.theAlert);
}
}
} );
}
Scope in javascript is function based.
Since you define the 3 functions inside a function that is run on DOMready and then goes out of scope, so does the funcitons.
In other words: the 3 functions only exist inside the DOmready function, and you cannot use them from anywhere else outside that function.
Related
I am displaying Two or Three DataTables and each of these Tables are Independent of each other and are placed on their own parent container and have their own Ajax Operations. Now my concern is if any of the DataTable's Ajax Operations returns the Failure Response or (Success operations with Failed Data inside it), then all the Tables must be hidden and the Error Message Should display in the Page. How can I do this?
You can use about for cancel XMLHttpRequest are pending status
example
<!-- begin snippet: js hide: false console: true babel: false -->
var requestTable1 = $.ajax({
type: 'POST',
url: 'someurl1',
success: function (result) { }
});
var requestTable2 = $.ajax({
type: 'POST',
url: 'someurl2',
success: function (result) { }
});
var requestTable3 = $.ajax({
type: 'POST',
url: 'someurl3',
success: function (result) { }
});
$( document ).ajaxError(function( event, jqxhr, settings, thrownError ) {
if ( settings.url == "someurl1" ) {
requestTable2.about();// and alert msg
requestTable3.about();
}
else if ( settings.url == "someurl2" ) {
requestTable1.about();// and alert msg
requestTable3.about();
}
else if ( settings.url == "someurl3" ) {
requestTable1.about();// and alert msg
requestTable2.about();
}
});
I think it might help you.
I have a function in JS & jQuery that fires an AJAX call and it has a callback block to let me know when it's finished:
function ajaxCall(url, type, dataType, dataToSend, callback) {
if (dataType == undefined) dataType = "json";
if (dataToSend == undefined) dataToSend = null;
$.ajax({
url: url,
type: type,
dataType: dataType,
contentType: "application/json",
data: dataToSend,
async: true,
success: function (result) {
callback(result);
},
error: function (data, status) {
console.error("Server Error: " + status);
}
});
}
I am accessing it like so, but using external functions like showAjaxLoader() just doesn't work! it says this function is undefined:
function registerUser(data) {
ajaxCall(pathServiceRegister, "POST", undefined, JSON.stringify(data), function (result) {
// SOME CODE THAT RUNS WHEN IT'S COMPLETE
// External method:
showAjaxLoader(false); // Doesn't work
});
});
function showAjaxLoader(show) {
var loader = $('.ajax-loader');
if (show) {
loader.fadeIn("fast");
} else {
loader.fadeOut("fast");
}
}
What am I doing wrong?
Thanks :)
Worked out some sample. this may be good practice. Try this :
$(document).ready(function() {
$("button").click(function() {registerUser();});
});
var Scallback = function(arg) {
alert("Success :"+arg);
showAjaxLoader(true);
}
var Ecallback = function(arg) {
alert("Err :"+arg);
showAjaxLoader(true);
}
function showAjaxLoader(show) {
var loader = $('.ajax-loader');
if (show) {
loader.fadeIn("fast");
} else {
loader.fadeOut("fast");
}
}
function ajaxCall(url, type, Scallback, Ecallback) {
$.ajax({
url : url,
type : type,
async : true,
success : function(result) {
Scallback(result);
},
error : function(data) {
Ecallback(data)
}
});
}
function registerUser()
{
ajaxCall(pathServiceRegister, "GET", Scallback, Ecallback);
}
Have you tried to do something like:
var that = this;
function registerUser(data) {
ajaxCall(pathServiceRegister, "POST", undefined, JSON.stringify(data), function (result) {
// SOME CODE THAT RUNS WHEN IT'S COMPLETE
// External method:
that.showAjaxLoader(false);
});
});
Declare your method like this
var obj = {
showAjaxLoader : function(show) {
var loader = $('.ajax-loader');
if (show) {
loader.fadeIn("fast");
} else {
loader.fadeOut("fast");
}
}
}
Then inside ajax, call obj.showAjaxLoader(false); This may work.
I am submitting form data using Ajax and they are successfully saved in the database and I am able to alert the response data. I now want to use the returned data as response to call another function using Ajax and pass them as parameters so that to the called function they can be used to fetch data and and display them on the web page.
The problem is that when the data have been alerted, the function I call using Ajax is not responding even when I use some functions like window.location.href, window.location.replace, window.location.reload they are not executed
Here is the sample code
submitHandler: function(form) {
/*errorHandler.hide(); */
var el = $(div);
el.block({
overlayCSS: {
backgroundColor: '#fff'
},
message: '<i class="fa fa-refresh fa-spin"></i>',
css: {
border: 'none',
color: '#333',
background: 'none'
}
});
/*Set off for database validation */
$('#name1').removeClass('has-error');
$('#name1 .help-block').empty();
$('#date1').removeClass('has-error');
$('#date1 .help-block').empty();
/*end database validation */
/*ajax options */
var options = {
/*target: '#output2', target element(s) to be updated with server response */
success: function(data, textStatus, XMLHttpRequest) {
el.unblock();
if (!data.success) {
/*append error message on the form for each control and database validation*/
console.log(data);
if (data.errors.name1) {
$('#name1').addClass('has-error');
$('#name1 .help-block').html(data.errors.name1);
}
} else {
var business_id = data.business_id;
var bnm_app_id = data.bnm_app_id;
var name = data.name;
var doc = data.doc;
alert(business_id);
alert(bnm_app_id);
alert(name);
alert(doc);
if (window.XMLHttpRequest) {
myObject = new XMLHttpRequest();
} else if (window.ActiveXObject) {
myObject = new ActiveXObject('Micrsoft.XMLHTTP');
myObject.overrideMimeType('text/xml');
}
myObject.onreadystatechange = function() {
data = myObject.responseText;
if (myObject.readyState == 4) {
//document.getElementById('step-2').innerHTML = data;
window.location.reload(true);
}
}; //specify name of function that will handle server response........
myObject.open('GET', '<?php echo base_url()."bn_application/register";?>?bnm_app_id=' + bnm_app_id + '&doc=' + doc + '&business_id=' + business_id + '&name=' + name, true);
myObject.send();
}
},
error: function(xhr, textStatus, errorThrown) {
el.unblock();
if (xhr.responseText === undefined) {
$.gritter.add({
/* (string | mandatory) the heading of the notification */
title: 'Connection timed out',
class_name: 'gritter-black'
});
} else {
var myWindow = window.open("Error", "MsgWindow", "width=900, height=400");
myWindow.document.write(xhr.responseText);
}
/*clear controls that do not need to keep its previous info */
},
url: home + 'bn_application/save_clearance_name',
/* override for form's 'action' attribute*/
data: {
name1_percent: name1_percent
},
type: 'post',
/* 'get' or 'post', override for form's 'method' attribute*/
dataType: 'json',
/* 'xml', 'script', or 'json' (expected server response type)*/
beforeSend: function() {
},
uploadProgress: function(event, position, total, percentComplete) {
},
complete: function() {
}
};
/*submit form via ajax */
$('#bn_clearance').ajaxSubmit(options);
}
If i understand you right , you need something like this ?
$.ajax({
type: "GET",
url: baseUrl + 'api/cars',
success: function (firstResponse) {
$.ajax({
type: "GET",
url: baseUrl + 'api/cars/' + firstResponse[0].Id,
success: function (secondResponse) {
window.location.href = secondResponse[0].Make;
}
});
}
});
You can use window.open function
$("button").click(function(){
$.ajax({url: "demo_test.txt", success: function(result){
$("#div1").html(result);
window.open("http://www.w3schools.com", "_self");
}});
});
You should put your redirecting url in success function of ajax. (if you are using jQuery). Because javascript runs codes asynchronously and probably your code tries to run before you get response from request.
I want to execute a callback function inside an object. I don't know if there is something wrong in the way I'm doing this.
I've googled for a solution, also searched on stackoverflow but couldn't find anything similar to the way I'm coding this.
PHPGateway.js
var PHPGateway = {
opt_friendlyURL: true,
opt_folder: 'ajax/',
callback_function: null,
useFriendlyURL: function (bool) {
this.opt_friendlyURL = bool;
},
setFolder: function (folder) {
this.opt_folder = folder;
},
send: function (service, method, data, callback) {
var url,
json_data = {};
if (this.opt_friendlyURL) {
url = this.opt_folder + service + '/' + method;
} else {
url = this.opt_folder + 'gateway.php?c=' + service + '&m=' + method;
}
if (data != undefined) {
json_data = JSON.stringify(data);
}
this.callback_function = (callback == undefined) ? null : callback;
$.ajax({
method: 'POST',
url: url,
data: {data: json_data},
success: this.ajax_success,
error: this.ajax_error
});
},
ajax_success: function (returned_object) {
if (this.callback_function != null) {
this.callback_function(returned_object.error, returned_object.data);
}
},
ajax_error: function () {
this.callback_function.call(false, {});
}
};
Then inside the HTML file that loads PHPGateway.js, I've the following code:
<script>
function submit_handler(event) {
event.preventDefault();
form_submit();
}
function form_callback(error, data) {
if(error == null) {
alert(data.text);
}
}
function form_submit() {
var data = {
status: $('#inStatus').val(),
amount: $('#inAmount').val(),
id: $('#inBudgetID'). val()
}
PHPGateway.send('budget', 'status', data, form_callback);
}
$('form').one('submit', submit_handler);
</script>
I get an error on this.callback_function(returned_object.error, returned_object.data);, the error is Uncaught TypeError: Object # has no method 'callback_function'.
What am I doing wrong?
Is this the best way to do it?
Thank You!
Based on minitech answer, I've updated PHPGateway.js like this. I've omitted the parts that weren't updated.
var PHPGateway = {
// Omitted code
send: function (service, method, data, callback) {
var url,
json_data = {},
that = this;
if (this.opt_friendlyURL) {
url = this.opt_folder + service + '/' + method;
} else {
url = this.opt_folder + 'gateway.php?c=' + service + '&m=' + method;
}
if (data != undefined) {
json_data = JSON.stringify(data);
}
this.callback_function = (callback == undefined) ? null : callback;
$.ajax({
method: 'POST',
url: url,
data: {data: json_data},
success: function(data, textStatus, jqXHR) {
that.ajax_success(data, textStatus, jqXHR);
},
error: function(jqXHR, textStatus, errorThrown) {
that.ajax_error(jqXHR, textStatus, errorThrown);
}
});
},
ajax_success: function (data, textStatus, jqXHR) {
if (this.callback_function != null) {
this.callback_function(true, data.data);
}
},
ajax_error: function (jqXHR, textStatus, errorThrown) {
this.callback_function.call(false, {});
}
};
Now it works!!!
In your call to $.ajax, you need to add a context option:
$.ajax({
method: 'POST',
url: url,
data: {data: json_data},
context: this,
success: this.ajax_success,
error: this.ajax_error
});
Your this variable in your Ajax success and error handlers are not pointing to the object you think they are. The context option to $.ajax() sets which object this points to in the Ajax callbacks.
Here’s your problem:
$.ajax({
method: 'POST',
url: url,
data: {data: json_data},
success: this.ajax_success,
error: this.ajax_error
});
When you set success and error to methods on this, they don’t keep their this. When a JavaScript function is called, it gets bound a this:
someFunction(); // this is undefined or the global object, depending on strict
someObject.someFunction(); // this is someObject
The built-in .call, .apply, and .bind of Function objects help you override this.
In your case, I think jQuery binds this to the Ajax object – a good reason to both not use jQuery and always use strict mode.
If you can guarantee or shim ES5 support, bind is an easy fix:
$.ajax({
method: 'POST',
url: url,
data: {data: json_data},
success: this.ajax_success.bind(this),
error: this.ajax_error.bind(this)
});
Which is equivalent to this if you can’t:
var that = this;
$.ajax({
method: 'POST',
url: url,
data: {data: json_data},
success: function() {
that.ajax_success.apply(that, arguments);
},
error: function() {
that.ajax_error.apply(that, arguments);
}
});
And now, a tip for you: don’t namespace, and if you do, don’t use this. this is great for objects that are meant to be constructed. What would seem more appropriate is something like this, if you really have to:
var PHPGateway = (function() {
var callbackFunction;
var options = {
friendlyURL: true,
…
};
…
function send(service, method, data, callback) {
…
}
…
return { send: send };
})();
could you please help with this. I have the following javascript:
$('form').click(function (e)
{
if (e.target.getAttribute('id') === 'SubmitAddLevel')
{
var parent = $('#' + e.target.getAttribute('attr')),
var Data = [];
parent.find('.input').children().each(function (i, e)
{
Data.push(e.getAttribute('id') + ":" + e.value);
console.log(Data);
});
$.ajax({
type: "POST",
url: 'AjaxControls.aspx/CreateUserLevel',
//data: Data, //.join(','),
dataType: "text",
contentType: "application/json; charset=utf-8",
//error: function (er) { alert(er); },
success: function (response)
{
if (response.d === "true")
{
$("#ErrorDivAddLevel").html('Level created successfully!').fadeIn('slow');
}
else
{
$("#SuccessDivAddLevel").html('Level creation failed!').fadeIn('slow');
}
},
});
}
The result of 'Data' I got on the console is :["LevelNameAddLevel:Admin", "PriviledgeIDAddLevels:|1|2|3|4|5|6|7|"]. How do I convert this to what ajax will pass to my web menthod?
Here is the web method
<WebMethod(EnableSession:=True)>
Public Shared Function CreateUserLevel(userLevel As String, userPriviledges As String) As String
return "true"
end function
I think your Data should look something more like this:
[{"LevelNameAddLevel":"Admin"}, {"PriviledgeIDAddLevels":"|1|2|3|4|5|6|7|"}]
So you have key / value pairs inside of an array. In the request, you should then be able to fetch the data via the keys in the request.
But I'm not quite sure what this is supposed to mean : "|1|2|3|4|5|6|7|"