I have this lines of code placed inside an app i am currently developing. I send to the url the valdat variable which is then processed through a php file and then echoed back to the app. How can i append to a variable x the data the alert message displays?
var valdat="foo";
$.ajax({
url: 'http://www.link./file.php',
type: 'POST',
data: {
valdat:valdat
},
error: function(data) {
alert(data);
},
success: function(data) {
alert(data);
},
});
If you mean append the returning value directly to a known variable you can just use +=:
var valdat ="foo";
var x = "Something";
$.ajax({
url: 'http://www.link./file.php',
type: 'POST',
data: {
valdat:valdat
},
error: function(data) {
x += data;
alert(x); //Will output "Something" + the content of `data`
},
success: function(data) {
x += data;
alert(x); //Will output "Something" + the content of `data`
},
});
this resolved it...the ajax call was being performed async which means it runs parallel with the rest of JS, meaning that the compiler does the following things:
1)valdat=foo
2)x=bar
3)h=x
4)ajax call
so the program didn't know who x was because it didn't have one until the end of it
https://stackoverflow.com/a/5936026/5467736
Related
I am working on the jquery to call a function to get the return value that I want to store for the variable email_number when I refresh on a page.
When I try this:
function get_emailno(emailid, mailfolder) {
$.ajax({
url: 'getemailnumber.php',
type: 'POST',
data : {
emailid: emailid,
mailfolder: mailfolder
},
success: function(data)
{
email_number = data;
}
});
return email_number;
}
I will get the return value as 6 as only when I use alert(email_number) after the email_number = data;, but I am unable to get the value outside of a function.
Here is the full code:
var email_number = '';
// check if page refreshed or reloaded
if (performance.navigation.type == 1) {
var hash = window.location.hash;
var mailfolder = hash.split('/')[0].replace('#', '');
var emailid = 'SUJmaWg4RTFRQkViS1RlUzV3K1NPdz09';
get_emailno(emailid, mailfolder);
}
function get_emailno(emailid, mailfolder) {
$.ajax({
url: 'getemailnumber.php',
type: 'POST',
data : {
emailid: emailid,
mailfolder: mailfolder
},
success: function(data)
{
email_number = data;
}
});
return email_number;
}
However, I have been researching and it stated that I would need to use callback via ajax but I have got no idea how to do this.
I have tried this and I still don't get a return value outside of the get_emailno function.
$.ajax({
url: 'getemailnumber.php',
type: 'POST',
async: true,
data : {
emailid: emailid,
mailfolder: mailfolder
},
success: function(data)
{
email_number = data;
}
});
I am getting frustrated as I am unable to find the solution so I need your help with this. What I am trying to do is I want to call on a get_emailno function to get the return value to store in the email_number variable.
Can you please show me an example how I could use a callback function on ajax to get the return value where I can be able to store the value in the email_number variable?
Thank you.
From the jquery documentation, the $.ajax() method returns a jqXHR object (this reads fully as jquery XMLHttpRequest object).
When you return data from the server in another function like this
function get_emailno(emailid, mailfolder) {
$.ajax({
// ajax settings
});
return email_number;
}
Note that $.ajax ({...}) call is asynchronous. Hence, the code within it doesn't necessarily execute before the last return statement. In other words, the $.ajax () call is deferred to execute at some time in the future, while the return statement executes immediately.
Consequently, jquery specifies that you handle (or respond to) the execution of ajax requests using callbacks and not return statements.
There are two ways you can define callbacks.
1. Define them within the jquery ajax request settings like this:
$.ajax({
// other ajax settings
success: function(data) {},
error: function() {},
complete: function() {},
});
2. Or chain the callbacks to the returned jqXHR object like this:
$.ajax({
// other ajax settings
}).done(function(data) {}).fail(function() {}).always(function() {});
The two methods are equivalent. success: is equivalent to done(), error: is equivalent to fail() and complete: is equivalent to always().
On when it is appropriate to use which function: use success: to handle the case where the returned data is what you expect; use error: if something went wrong during the request and finally use complete: when the request is finished (regardless of whether it was successful or not).
With this knowledge, you can better write your code to catch the data returned from the server at the right time.
var email_number = '';
// check if page refreshed or reloaded
if (performance.navigation.type == 1) {
var hash = window.location.hash;
var mailfolder = hash.split('/')[0].replace('#', '');
var emailid = 'SUJmaWg4RTFRQkViS1RlUzV3K1NPdz09';
get_emailno(emailid, mailfolder);
}
function get_emailno(emailid, mailfolder) {
$.ajax({
url: 'getemailnumber.php',
type: 'POST',
data : {
emailid: emailid,
mailfolder: mailfolder
},
success: function(data)
{
// sufficient to get returned data
email_number = data;
// use email_number here
alert(email_number); // alert it
console.log(email_number); // or log it
$('body').html(email_number); // or append to DOM
}
});
}
I'm trying to figure out how to access to all the data from a json provided by movie database api, but I don't understand how to retrieve it.
The console log give me an "data is not defined" error.
So here is my code:
$(document).ready (function(){
var key = 'api key provided';
$.ajax({
type: 'GET',
url : 'http://api.themoviedb.org/3/search/movie'+key+'&query=Minions',
dataType: 'jsonp',
data: {
format:'json'
},
error: $('#result').append("errore"),
success: function(data){$('#result').append("ok")}
});
var jsonData=data.results.original_title;
//this give me a data is not provided
});
Here a portion of json:
Let's assume that I only want to access to the release_date propriety, how can I achieve this?
data not is defined out of $.ajax() closure, you need to move the code to success handler like, then loop through the JSON data.results.
success: function(data){
$('#result').append("ok");
console.log(data);
$.each(data.results, function(i, result) {
console.log('Release date is' + result.release_date);
});
}
alternatively, you can define a variable, then update that variable in success handler of $.ajax()
var ajaxResponse;
$.ajax({
/* skipped lines*/
success: function(data){
ajaxResponse = data
}
});
Hello there I'm trying to create an app to search for recipes. I've tried using the Yummly API and BigOven api, but I can't get either to work.
here is the code i have for bigOven. I can't get any search results to appear in the "results".
$(function() {
$('#searchform').submit(function() {
var searchterms = $("#searchterms").val();
// call our search twitter function
getResultsFromYouTube(searchterms);
return false;
});
});
function getResultsFromYouTube (searchterms) {
var apiKey = "dvxveCJB1QugC806d29k1cE6x23Nt64O";
var titleKeyword = "lasagna";
var url = "http://api.bigoven.com/recipes?pg=1&rpp=25&title_kw="+ searchterms + "&api_key="+apiKey;
$.ajax({
type: "GET",
dataType: 'json',
cache: false,
url: url,
success: function (data) {
alert('success');
console.log(data);
$("#results").html(data);
}
});
}
Can anyone give me instructions on how to do this?? Thank you very much.
The API is returning JSON data, not HTML. I checked the API docs, and JSONP isn't necessary.
However, when you run this code:
$('#results').html(data);
Your code is going to just put the JSON into your HTML, and that isn't going to get displayed properly. You didn't say whether console.log(data) outputs the data correctly, but I'll assume it is.
So, you'll need to transform your JSON into HTML. You can do that programmatically, or you can use a templating language. There are a number of options, including underscore, jquery, mustache and handlebars.
I recommend handlebars, but it's not a straightforward bit of code to add (the main difficulty will be loading your template, or including it in your build).
http://handlebarsjs.com/
It would depend on you which key and values you have to show to your user's and in which manner... For ex. there is even an image link, you could either show that image to your user's or could just show them the image link...
Simple <p> structure of all the key's with there value's
jQuery
$.each(data.Results, function (key, value) {
$.each(value, function (key, value) {
$("#result").append('<p>Key:-' + key + ' Value:-' + value + '</p>');
});
$("#result").append('<hr/>');
});
Your ajax is working, you just need to parse the results. To get you started:
$.ajax({
type: "GET",
dataType: 'json',
cache: false,
url: url,
success: function (data) {
// Parse the data:
var resultsString = "";
for (var i in data.Results){
console.log( data.Results[i] );
resultsString+= "<div>"+data.Results[i].Title+ " ("+data.Results[i].Cuisine+")</div>";
}
$("#results").html(resultsString);
// If you want to see the raw JSON displayed on the webpage, use this instead:
//$("#results").html( JSON.stringify(data) );
}
});
I had created a little recursive function that iterates through JSON and spits out all of the values (I subbed my output for yours in the else condition) -
function propertyTest(currentObject, key) {
for (var property in currentObject) {
if (typeof currentObject[property] === "object") {
propertyTest(currentObject[property], property);
} else {
$('#results').append(property + ' -- ' + currentObject[property] + '<br />');
}
}
}
Then I called it within your AJAX success -
$.ajax({
type: "GET",
dataType: 'json',
cache: false,
url: url,
success: function (data) {
console.log(data);
propertyTest(data); // called the function
}
});
It spits out all of the data in the JSON as seen here - http://jsfiddle.net/jayblanchard/2E9jb/3/
I am trying to assign value I receive from the php file to the jquery variable. The php file runs a loop and echos out a value. I am trying then to store the value in the jquery variable but I am getting NaN result back. How can I assign the value echoed from the php file into the variable in the jquery function?
var increment;
event.preventDefault();
$.ajax({
type: 'POST',
url: 'increment.php',
data: $(this).serialize(),
dataType: 'text',
success: function (data) {
//console.log(data);
data = increment;
}
});
You should be using
increment = data;
instead of
data = increment;
Also one more thing to note here is the request nature. Since the ajax request is asynchronous accessing the variable outside might show unexpected result. You have to access the variable once the ajax request is successful (inside success callback).
do like so,you should assign data recieved to increment var:
var increment;
event.preventDefault();
$.ajax({
type: 'POST',
url: 'increment.php',
data: $(this).serialize(),
dataType: 'text',
success: function (data) {
//console.log(data);
increment = data ;
}
});
Now that every google link in the first 5 pages of results is :visited in my browser, I needed to ask...
How can I get the JSON data working so that I can access it/manipulate it in other methods?
_otherMethod: function() {
// END GOAL OF WHERE I WANT THIS TO BE AVAILABLE
var text = this._requestText();
},
_requestText: function() {
var url = 'http://api.flickr.com/services/feeds/photos_public.gne?format=json';
$.ajax({
type: 'GET',
url: url,
async: false,
dataType: 'jsonp',
success: function(data) {
// works here
console.log(data);
// works here as well & fires local function
testing(data);
// doesnt store
var testvar_1 = data;
}
});
// undefined
console.log(testvar_1);
function testing(data) {
// logs when called from above
console.log(data);
// doesnt store
var testvar_2 = data;
}
// undefined
console.log(testvar_2);
// havent found this yet...
return magicVariableThatLetsMeAccessJSON
}, ...
any ideas? i know theres a lot of other similar questions on stack overflow, but i have found nothing that solves this.
thanks
UPDATE
var storage;
var yourobj = {
_otherMethod: function() {
// END GOAL OF WHERE I WANT THIS TO BE AVAILABLE
var text = this._requestText();
},
_requestText: function() {
var url = 'http://api.flickr.com/services/feeds/photos_public.gne?format=json';
$.ajax({
type: 'GET',
url: url,
async: false,
dataType: 'jsonp',
success: function(data) {
storage = data;
// logs correctly
console.log(storage);
}
});
}
}
//undefined
console.log(storage);
yourobj._requestText();
//undefined
console.log(storage);
Firstly as noted elsewhere, you need a variable that's in scope, secondly you need to make sure it's not evaluated before the callback is called.
The only way to ensure that is to make the call to _otherMethod inside the success call back method
_otherMethod: function(text) {
//...do what ever you need to do with text
},
_requestText: function() {
var url = 'http://api.flickr.com/services/feeds/photos_public.gne?format=json';
$.ajax({
type: 'GET',
url: url,
async: false,
dataType: 'jsonp',
success: function(data) {
_otherMethod(data);
},
}
});
}
callbacks are asyncronous meaning they are called at some point in time that's not determined by the sequence of code lines.
If you know the code using the returned data is never going to be call before the success call back has executed and you need to hold on to the data you can change the code to
_otherMethod: null, //not strictly needed
_requestText: function() {
self = this;
var url = 'http://api.flickr.com/services/feeds/photos_public.gne?format=json';
$.ajax({
type: 'GET',
url: url,
async: false,
dataType: 'jsonp',
success: function(data) {
self._otherMethod = function(data){
return function(){
//do what you need to with data. Data will be stored
//every execution of _otherMethod will use the same data
console.log(data);
}
}
},
}
});
}
Very simple. You need a storage variable outside of the context of the callback function.
var storage;
var yourobj = {
_otherMethod: function() {
// END GOAL OF WHERE I WANT THIS TO BE AVAILABLE
var text = this._requestText();
},
_requestText: function() {
var url = 'http://api.flickr.com/services/feeds/photos_public.gne?format=json';
$.ajax({
type: 'GET',
url: url,
async: false,
dataType: 'jsonp',
success: function(data) {
storage = data;
}
});
}
}
Alternatively, storage can be a property on the same object.
By adding var before your variable name, you create a local variable in the current scope.
This doesn't work:
var a = 2;
(function() {
var a = 3;
})();
console.log(a); // 2
While this does:
var a = 2;
(function() {
a = 3;
})();
console.log(a); // 3
Since the variable that you're trying to set is in an outer scope, get rid of var when working with it in an inner scope.
might be this way:
_requestText: function() {
var url = 'http://api.flickr.com/services/feeds/photos_public.gne?format=json';
var testvar_1;
$.ajax({
type: 'GET',
url: url,
async: false,
dataType: 'jsonp',
success: function(data) {
console.log(data);
testing(data);
testvar_1 = data;
}
});
// should work here
console.log(testvar_1);
Actually you were creating a new instance of that var there.