Images does not show immediately after ajax load - javascript

I'm using an Ajax for partial loading my website. Content of GET data has images but these images appear after few seconds on page. Image size is about 20kB, so this is not a bottleneck.
I'm using php page which returns some content. This page loads in a while with images immediately but with ajax it loads text, but images after few seconds. How can I achieve quick load?
I'm using this function:
function loadMainEvents(resultDiv, cat, limit){
var spinner = new Spinner().spin(mainPageEvents);
$.ajax({
url: "/getMainPageEvents.php?category=" + cat + "&limit=" + limit,
type: "GET",
success: function(data){
resultDiv.innerHTML = data;
spinner.stop();
}
});
};
EDIT:
I created a test.php which is doing same thing
<html>
<head>
<script src='https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js' type="text/javascript"></script>
</head>
<body>
<div id="div" style="float:left;">wait</div>
<div id="div2">wait</div>
<script>
$(function () {
$.ajax({
url: "/getMainPageEvents.php?category=&limit=10&from=29.11.2015&to=29.11.2015&pno=1",
type: "GET",
success: function (data) {
$("#div").html(data).on('load', function () {
$(this).fadeIn(250);
});
}
});
$.ajax({
url: "/getMainPageEvents.php?category=&limit=10&from=29.11.2015&to=29.11.2015&pno=1",
type: "GET",
success: function (data) {
$("#div2").html(data).on('load', function () {
$(this).fadeIn(250);
});
}
});
});
</script>
</body>
getMainPageEvents.php returns only web content.
Network from developer tools:

You may want to try something like this in the success function. Hide the result div first and foremost, then after the data is loaded, show the div.
$(resultDiv).html(data).promise().done(function(){
spinner.stop();
$(this).fadeIn(250);
});
Possible second solution
$(resultDiv).html(data).on('load', function(){
spinner.stop();
$(this).fadeIn(250);
});

Related

Onload Page load extern page

i use this AJAX script to load an extern page (mpt_planningen_overzicht.php) into a div op the mainpage (mainpage.php) when people select or unselect a checkbox.
But i also want to load the data from the extern page in the div when mainpage.php is opened.
How can i do this?
Script:
<script type="text/javascript">
$(document).ready(function(){
$('input[type="checkbox"]').on('click', function(){
var formData = $(":input,:hidden").serialize();
$.ajax({
type: "POST",
url: "mpt_planningen_overzicht.update.php",
data: formData,
success: function(result){ /* GET THE TO BE RETURNED DATA */
$("#resultaat").html(result); /* THE RETURNED DATA WILL BE SHOWN IN THIS DIV */
}
});
});
});
</script>
I thought something like this:
function onLoadSubmit() {
document.nameofForm.submit();
}
But the Ajax script that checks if a selectbox is checked/unchecked is already on mainpage.php, so when i add the script above, it will continue reloading.
If I understood the question correctly, you can try something like this:
<script type="text/javascript">
//separationg the function that loads the page in order to use it multiple times
var loadSepratePage = function(){
var formData = $(":input,:hidden").serialize();
$.ajax({
type: "POST",
url: "mpt_planningen_overzicht.update.php",
data: formData,
success: function(result){ /* GET THE TO BE RETURNED DATA */
$("#resultaat").html(result); /* THE RETURNED DATA WILL BE SHOWN IN THIS DIV */
}
});
}
$(document).ready(function(){
$('input[type="checkbox"]').on('click', loadSepratePage); // without paranthesis () to pass the function as a parameter
loadSepratePage() // with paranthesis () to actually call the function
});
</script>
If this is not what you mean feel free to leave comment

Updating div content after form submit without page reload

alright, I have a popup which displays some notes added about a customer. The content (notes) are shown via ajax (getting data via ajax). I also have a add new button to add a new note. The note is added with ajax as well. Now, the question arises, after the note is added into the database.
How do I refresh the div which is displaying the notes?
I have read multiple questions but couldn't get an answer.
My Code to get data.
<script type="text/javascript">
var cid = $('#cid').val();
$(document).ready(function() {
$.ajax({ //create an ajax request to load_page.php
type: "GET",
url: "ajax.php?requestid=1&cid="+cid,
dataType: "html", //expect html to be returned
success: function(response){
$("#notes").html(response);
//alert(response);
}
});
});
</script>
DIV
<div id="notes">
</div>
My code to submit the form (adding new note).
<script type="text/javascript">
$("#submit").click(function() {
var note = $("#note").val();
var cid = $("#cid").val();
$.ajax({
type: "POST",
url: "ajax.php?requestid=2",
data: { note: note, cid: cid }
}).done(function( msg ) {
alert(msg);
$("#make_new_note").hide();
$("#add").show();
$("#cancel").hide();
//$("#notes").load();
});
});
</script>
I tried load, but it doesn't work.
Please guide me in the correct direction.
Create a function to call the ajax and get the data from ajax.php then just call the function whenever you need to update the div:
<script type="text/javascript">
$(document).ready(function() {
// create a function to call the ajax and get the response
function getResponse() {
var cid = $('#cid').val();
$.ajax({ //create an ajax request to load_page.php
type: "GET",
url: "ajax.php?requestid=1&cid=" + cid,
dataType: "html", //expect html to be returned
success: function(response) {
$("#notes").html(response);
//alert(response);
}
});
}
getResponse(); // call the function on load
$("#submit").click(function() {
var note = $("#note").val();
var cid = $("#cid").val();
$.ajax({
type: "POST",
url: "ajax.php?requestid=2",
data: {
note: note,
cid: cid
}
}).done(function(msg) {
alert(msg);
$("#make_new_note").hide();
$("#add").show();
$("#cancel").hide();}
getResponse(); // call the function to reload the div
});
});
});
</script>
You need to provide a URL to jQuery load() function to tell where you get the content.
So to load the note you could try this:
$("#notes").load("ajax.php?requestid=1&cid="+cid);

AJAX load page and reload/add after success

So I have a page which, when requested, updates my database. For example when I go to database_update.php it just updates the database and doesn't show anything.
Index.php shows user database content.
So I have function in JavaScript called update which must use AJAX to run this page and after the page loads (after all queries run successfully) it must load index.php and show updated page to the user (reload the page without refresh effect).
My code is like:
$.get('ajax_update_table.php', {
// The following is important because page saves to another table
// users nick which call update:
update: UserLogin
}, function (output) {
// The following is unimportant:
$(myDiv).html(output).show();
});
Two suggestions:
Return a "success" or "error" code from your database_update script. Returning a JSON string is very easy. For example:
echo '{"success":"success"}';
Use the $.ajax function. Then add the success, error, and complete parameters. You can call any javascript function(s) when the AJAX request is complete.
$.ajax({
url: 'update_database.php',
dataType: 'json',
success: function (data) {successFunction(data)},
error: function () { error(); },
complete: function () { complete(); }
});
function successFunction(data) {
if ('success' in data) {
// Do success stuff here.
} else {
// Show errors here
}
}
// .... etc
I might be missing something, but I'll try to answer your question.
I would setup a blank page that on loading it sends the index.php to a div on that page. For example, make a page titled blank.php.
blank.php would have the following:
function Index(){
$.ajax({
url:"index.php",
type: "GET",
success:function(result){
$("#web-content").html(result);
}
});
}
<script type="text/javascript">Index();</script>
<div id="web-content"></div>
You would then have your index execute the Index function to update the web-content div with the index.php data without reloading the blank.php page.
Got it to work!
my index.php
<html>
<head>
<script type="text/javascript" language="Javascript" SRC="http://code.jquery.com/jquery-1.8.2.min.js"></script>
<script type="text/javascript" language="Javascript">
function update_and_replace()
{
$.ajax({
url: 'ajax_update_table.php',
dataType: 'json',
success: function (data) {successFunction(data)},
error: function () { error(); },
complete: function () { complete(); }
});
}
function successFunction(data) {
if ('success' in data) {
$("#content").load("index.php");
}
}
</script>
</head>
<body>
<div id='content'>
Now is: <?php echo date("Y-m-d, H:i:s");?>
<br/><br/><br/><br/>
Aktualizuj
</div>
</body>
</html>
Ajax_update_table.php
<?php echo '{"success":"success"}'; ?>
Thank You all for your help.
I know that my English is bad but with your help I made it!

Jquery method executed several time

I'm trying to implement simple Comet chat example and for this I implemented Long polling which calls itself recursively every 30 seconds.
When pressing on button I want another ajax request to send new data on Server using POST.
For now I just put alert to this function to trigger click event
<script src="http://code.jquery.com/jquery-1.6.2.min.js"></script>
<script type="text/javascript">
var polling = function poll(){
$("#postMessage").click(function () {
alert("request");
});
$.ajax({ dataType: 'json',url: "CometServlet", success: function(data){
if (data !=null){
$('#message').append(data.sender+" : " + data.message+"<br />");
}
}, complete: poll, timeout: 30000 });
}
$(document).ready(polling)
</script>
And my HTML is like this:
<div>
<input type="button" id="postMessage" value="post Message">
</div>
<div id ="message" name="message"></div>
When I click on button my alert is shown several times. Why? How can I solve it?
As Dave mentions, that's not what the timeout option is for. Try something using setTimeout instead. Also, you're mixing your polling logic and your click handler (I think). Here's how you would separate them:
function poll() {
$.ajax({
dataType: 'json',
url: "CometServlet",
success: function(data){
if (data !=null){
$('#message').append(data.sender+" : " + data.message+"<br />");
}
},
complete: function () {
setTimeout(poll, 30000);
}
});
}
$(document).ready(function () {
$("#postMessage").click(function () {
alert("request");
});
poll();
});
Example: http://jsfiddle.net/VyGTh/
In your code after every Ajax call you re-bind click event to #postMessage and that's why you had couple of alert messages. You need to bind click only once in page load. You can fix it by doing something like:
<script src="http://code.jquery.com/jquery-1.6.2.min.js"></script>
<script type="text/javascript">
var polling = function poll(){
$.ajax({ dataType: 'json',url: "CometServlet",
success: function(data){
if (data !=null){
$('#message').append(data.sender+" : " + data.message+"<br />");
}
},
complete: poll,
timeout: 30000
});
}
$(document).ready(function(){
// Now Click only binds one time
$("#postMessage").click(function () {
alert("request");
});
polling();
});
</script>

Display 'loading' image when AJAX call is in progress

I have the following jQuery Ajax call:
$.ajax({
type: "POST",
url: "addtobasket.php",
data: "sid=<?= $sid ?>&itemid=" + itemid + "&boxsize=" + boxsize + "&ext=" + extraval,
success: function(msg){
$.post("preorderbasket.php", { sid: "<?= $sid ?>", type: "pre" },
function(data){
$('.preorder').empty();
$('.preorder').append(data);
});
}
});
I want to display an image when the ajax call is in progress. How can I do that?
Thanks,
try this :
<script type="text/javascript">
$(document).ready(function()
{
$('#loading')
.hide()
.ajaxStart(function() {
$(this).show();
})
.ajaxStop(function() {
$(this).hide();
});
});
</script>
<div id="loading">
Loading....
</div>
This will show the loading image each time you are doing an ajax request, I have implented this div at the top of my pages, so it does not obstruct with the page, but you can always see when an ajax call is going on.
Something along these lines (showLoadingImage and hideLoadingImage are up to you):
// show the loading image before calling ajax.
showLoadingImage();
$.ajax({
// url, type, etc. go here
success: function() {
// handle success. this only fires if the call was successful.
},
error: function() {
// handle error. this only fires if the call was unsuccessful.
},
complete: function() {
// no matter the result, complete will fire, so it's a good place
// to do the non-conditional stuff, like hiding a loading image.
hideLoadingImage();
}
});
You can display the image just before this call to $.ajax() and then hide/remove the image in the post handler function (just before your .empty()/.append(data) calls.
It works. I have tested it.
<script type='text/javascript'>
$(document).ready(function(){
$("#but_search").click(function(){
var search = $('#search').val();
$.ajax({
url: 'fetch_deta.php',
type: 'post',
data: {search:search},
beforeSend: function(){
// Show image container
$("#loader").show();
},
success: function(response){
$('.response').empty();
$('.response').append(response);
},
complete:function(data){
// Hide image container
$("#loader").hide();
}
});
});
});
</script>
<input type='text' id='search'>
<input type='button' id='but_search' value='Search'><br/>
<!-- Image loader -->
<div id='loader' style='display: none;'>
<img src='reload.gif' width='32px' height='32px'>
</div>
<!-- Image loader -->
<div class='response'></div>

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