ajax request triggering multiple times when scrolling is fast - javascript

here i am trying to achieve infinite scrolling but what happens when i am scrolling too fast it fire multiple ajax request with same parameter , which cause same data again n again.how overcome from this problem pls help.
(function( $ ){
$.fn.scrollPagination = function(options) {
var opts = $.extend($.fn.scrollPagination.defaults, options);
var target = opts.scrollTarget;
if (target == null){
target = obj;
}
opts.scrollTarget = target;
return this.each(function() {
$.fn.scrollPagination.init($(this), opts);
});
};
$.fn.stopScrollPagination = function(){
return this.each(function() {
$(this).attr('scrollPagination', 'disabled');
});
};
var itr = 2;
$.fn.scrollPagination.loadContent = function(obj, opts){
var target = opts.scrollTarget;
var mayLoadContent = $(target).scrollTop()+opts.heightOffset >= $(document).height() - $(target).height();
if (mayLoadContent){
if (opts.beforeLoad != null){
opts.beforeLoad();
}
$(obj).children().attr('rel', 'loaded');
$.ajax({
type: 'POST',
url: opts.contentPage+"?iteration="+itr,
data: opts.contentData,
success: function(data){
itr++;
$(obj).append(data);
var objectsRendered = $(obj).children('[rel!=loaded]');
if (opts.afterLoad != null){
opts.afterLoad(objectsRendered);
}
}
});
}
};
$.fn.scrollPagination.init = function(obj, opts){
var target = opts.scrollTarget;
$(obj).attr('scrollPagination', 'enabled');
$(target).scroll(function(event){
if ($(obj).attr('scrollPagination') == 'enabled'){
$.fn.scrollPagination.loadContent(obj, opts);
//alert(event.isPropagationStopped());
}
//event.stopPropagation();
//console.log(event.isPropagationStopped());
event.preventDefault();
});
//$.fn.scrollPagination.loadContent(obj, opts);
};
$.fn.scrollPagination.defaults = {
'contentPage' : null,
'contentData' : {},
'beforeLoad': null,
'afterLoad': null ,
'scrollTarget': null,
'heightOffset': 0
};
})( jQuery );

How about firing off the ajax every 10 times the scroll event is triggered?
$.fn.scrollPagination.init = function(obj, opts) {
var target = opts.scrollTarget;
$(obj).attr('scrollPagination', 'enabled');
target.scrollCount = 0;
$(target).scroll(function(event) {
this.scrollCount++;
if (this.scrollCount % 10 == 0) {
if ($(obj).attr('scrollPagination') == 'enabled') {
$.fn.scrollPagination.loadContent(obj, opts);
//alert(event.isPropagationStopped());
}
//event.stopPropagation();
//console.log(event.isPropagationStopped());
event.preventDefault();
}
});
}

I used to call my ajax function when the scroll reaches the bottom of the page.
function nearBottomOfPage() {
return $(window).scrollTop() > $(document).height() - $(window).height() - 200;
}
$(window).scroll(function(){
if (loading) {
return;
}
if(nearBottomOfPage()) {
loading=true;
page++;
$("#place_of_loading_image").show();
$.ajax({
url:'your source',
type: 'get',
dataType: 'script',
success: function() {
$("#place_of_loading_image").remove();
loading=false;
}
});
}
});

Related

Ajax to fire on page load

I'm hoping someone can find what my issue is. my script only fires when scrolled down... I need that functionality. What it doesn't do is fire on page load too which I need it to do initially. So it loads the content first, then I can scroll down the page for more new content.
I tried putting the ajax inside a function with the function name outside and it still didn't fire.
$(document).ready(function() {
$(window).scroll(function() {
if ($(window).scrollTop() >= $(document).height() - $(window).height() - 100) {
flag = true;
first = $('#first').val();
limit = $('#limit').val();
no_data = true;
if (flag && no_data) {
flag = false;
$('#loadmoreajaxloader').show();
$.ajax({
url: "commentedoncontent.php",
dataType: "json",
method: "POST",
cache: false,
data: {
start: first,
limit: limit
},
success: function(data) {
flag = true;
$('#loadmoreajaxloader').hide();
if (data.count > 0) {
first = parseInt($('#first').val());
limit = parseInt($('#limit').val());
$('#first').val(first + limit);
$.each(data.posts, function(i, response) {
//post content here
});
} else {
alert('No more data to show');
no_data = false;
}
},
error: function(xhr, ajaxOptions, thrownError) {
alert(xhr.status);
flag = true;
no_data = false;
}
});
}
}
});
});
You need to separate it as a function, so you can call it on scroll AND on page load:
$(document).ready(function() {
myFunction();
$(window).scroll(function() {
if ($(window).scrollTop() >= $(document).height() - $(window).height() - 100) {
myFunction();
}
});
});
function myFunction(){
/* all the logic goes here */
}
You can place your code in a function and then execute it on page load and on on scrolling.
$(document).ready(function() {
doStuff(); //choose the name that you want
$(window).scroll(function() {
doStuff();
});
});
function doStuff(){
if ($(window).scrollTop() >= $(document).height() - $(window).height() - 100) {
flag = true;
first = $('#first').val();
limit = $('#limit').val();
no_data = true;
if (flag && no_data) {
flag = false;
$('#loadmoreajaxloader').show();
$.ajax({
url: "commentedoncontent.php",
dataType: "json",
method: "POST",
cache: false,
data: {
start: first,
limit: limit
},
success: function(data) {
flag = true;
$('#loadmoreajaxloader').hide();
if (data.count > 0) {
first = parseInt($('#first').val());
limit = parseInt($('#limit').val());
$('#first').val(first + limit);
$.each(data.posts, function(i, response) {
//post content here
});
} else {
alert('No more data to show');
no_data = false;
}
},
error: function(xhr, ajaxOptions, thrownError) {
alert(xhr.status);
flag = true;
no_data = false;
}
});
}
}
}

Ajax call doesn't work after success

I have a problem with ajax call after success.
I am trying to call my following javascript codes:
function imgResize($, sr) {
var debounce = function(func, threshold, execAsap) {
var timeout;
return function debounced() {
var obj = this,
args = arguments;
function delayed() {
if (!execAsap)
func.apply(obj, args);
timeout = null;
};
if (timeout)
clearTimeout(timeout);
else if (execAsap)
func.apply(obj, args);
timeout = setTimeout(delayed, threshold || 100);
};
}
// smartresize
jQuery.fn[sr] = function(fn) {
return fn ? this.bind('resize', debounce(fn)) : this.trigger(sr);
};
};
//CALL ON PAGE LOAD OR ANY TIME YOU WANT TO USE IT
imgResize(jQuery, 'smartresize');
/* Wait for DOM to be ready */
// Detect resize event
$(window).smartresize(function() {
// Set photo image size
$('.photo-row').each(function() {
var $pi = $(this).find('.photo-item'),
cWidth = $(this).parent('.photo').width();
// Generate array containing all image aspect ratios
var ratios = $pi.map(function() {
return $(this).find('img').data('org-width') / $(this).find('img').data('org-height');
}).get();
// Get sum of widths
var sumRatios = 0,
sumMargins = 0,
minRatio = Math.min.apply(Math, ratios);
for (var i = 0; i < $pi.length; i++) {
sumRatios += ratios[i] / minRatio;
};
$pi.each(function() {
sumMargins += parseInt($(this).css('margin-left')) + parseInt($(this).css('margin-right'));
});
// Calculate dimensions
$pi.each(function(i) {
var minWidth = (cWidth - sumMargins) / sumRatios;
$(this).find('img')
.height(Math.floor(minWidth / minRatio))
.width(Math.floor(minWidth / minRatio) * ratios[i]);
});
});
});
/* Wait for images to be loaded */
$(window).load(function() {
$(".photo").each(function() {
var imgGrab = $(this).find('.photo-item');
var imgLength = imgGrab.length;
for (i = 0; i < imgLength; i = i + 3) {
imgGrab.eq(i + 1)
.add(imgGrab.eq(i + 1))
.add(imgGrab.eq(i + 2))
.wrapAll('<div class="photo-row"></div>');
}
$(this).find(".photo-item").each(function() {
if ($(this).parent().is(":not(.photo-row)")) {
$(this).wrap('<div class="photo-row"></div>');
}
});
// Store original image dimensions
$(this).find('.photo-item img').each(function() {
$(this)
.data('org-width', $(this)[0].naturalWidth)
.data('org-height', $(this)[0].naturalHeight);
});
});
$(window).resize();
});
And here is my ajax code for LOAD MORE POST
$('body').on("click",'.morep', function(event) {
event.preventDefault();
var ID = $(this).attr("id");
var P_ID = $(this).attr("rel");
var URL = $.base_url + 'more_post.php';
var dataString = "lastpid=" + ID + "&post_id=" + P_ID;
if (ID) {
$.ajax({
type: "POST",
url: URL,
data: dataString,
cache: false,
beforeSend: function() {
$("#more" + ID).html('<img src="loaders/ajaxloader.gif" />');
},
success: function(html) {
$("div.post-content").append(html);
$("#more" + ID).remove();
imgResize(jQuery, 'smartresize');
}
});
} else {
$("#more").html('FINISHED');
}
return false;
});
The ajax should call imgResize(jQuery, 'smartresize'); but it is not working. What I am missing here anyone can help me here ?

How to handle execution of javascript in infinite scroll?

I am using infinite scroll to load posts and tried to integrate a custom like button for every single posts that needs a small jquery script to work. My problem is I added this Jquery directly after the sucess in ajax load posts. But when I load eg the 3. page my jquery script executes twice and on the posts of the 2nd page the lke buttons are not working correctly. How can I handle this? If I dont execute the code after the ajax request and only call this jquery code globally the like buttons do not work in the new loaded posts of the ajax infinite scroll. Maybe I need to stop the sript of before when eg loadin 3. page through the ajax infinite scroll but how? This is my code:
function load_more_posts(selector){
var url = $(selector).attr('href');
var data;
loading = true;
$.ajax({
url: url,
data: data,
success: function( data ) {
var $items = $( '.loading-content .item', data );
$new_anchor = $( selector, data );
$items.addClass('hidden');
if ( $('#cooked-plugin-page .result-section.masonry-layout .loading-content').length ){
$( '.loading-content').isotope( 'insert', $items );
} else {
$( '.loading-content').append($items);
setTimeout(function() {
$items.removeClass('hidden');
}, 200);
}
if($new_anchor.length) {
$(selector).attr('href', $new_anchor.attr('href'));
} else {
$(selector).remove();
}
loading = false;
$('.like-btn').each(function() {
var $button = $(this),
$icon = $button.find('> i'),
likedRecipes = $.cookie('cpLikedRecipes'),
recipeID = $button.attr('data-recipe-id');
cookied = $button.attr('data-cookied');
userLiked = $button.attr('data-userliked');
if ( cookied == 1 && typeof likedRecipes !== 'undefined' && likedRecipes.split(',').indexOf(recipeID) > -1 || userLiked == 1 ) {
$icon.removeClass('fa-heart-o').addClass('fa-heart');
}
});
$('#cooked-plugin-page .like-btn').on('click', function() {
var $button = $(this),
$icon = $button.find('> i'),
$count = $button.find('.like-count'),
count = parseInt($count.text()),
likedRecipes = $.cookie('cpLikedRecipes'),
recipeID = $button.attr('data-recipe-id'),
cookied = $button.attr('data-cookied'),
likeURL = $button.attr('href'),
likeAction;
if ( $icon.hasClass('fa-heart-o') ) {
$icon.removeClass('fa-heart-o').addClass('fa-heart');
count++;
if (cookied == 1){
if ( typeof likedRecipes === 'undefined' ) {
likedRecipes = recipeID;
} else {
likedRecipes = likedRecipes + ',' + recipeID;
}
$.cookie('cpLikedRecipes', likedRecipes, { expires: 365 } );
}
likeAction = 'like';
} else {
$icon.removeClass('fa-heart').addClass('fa-heart-o');
count--;
if (cookied == 1){
if ( typeof likedRecipes === 'undefied' ) {
return false;
}
}
if (cookied == 1){
var likedSplit = likedRecipes.split(','),
recipeIdx = likedSplit.indexOf(recipeID);
if ( recipeIdx > -1 ) {
likedSplit.splice( recipeIdx, 1 );
likedRecipes = likedSplit.join(',');
$.cookie('cpLikedRecipes', likedRecipes, { expires: 365 } );
likeAction = 'dislike';
}
} else {
likeAction = 'dislike';
}
}
$.ajax({
'url' : likeURL,
'data': {
'action' : 'cp_like',
'likeAction': likeAction
},
success: function(data) {
$count.text(data);
}
});
return false;
});
$('#cooked-plugin-page .tab-links a').on('click', function() {
var tab = $(this).attr('href');
if ( !$(this).is('.current') ){
$(this).addClass('current').siblings('.current').removeClass('current');
$('#cooked-plugin-page.fullscreen .tab').removeClass('current');
$(tab).addClass('current');
$win.scrollTop(0);
}
return false;
});
if($('.rating-holder').length) {
$('.rating-holder .rate')
.on('mouseenter', function() {
var $me = $(this);
var $parent = $me.parents('.rating-holder');
var my_index = $me.index();
var rated = $parent.attr('data-rated');
$parent.removeClass(function(index, css) {
return (css.match (/(^|\s)rate-\S+/g) || []).join(' ');
});
$parent.addClass('rate-' + (my_index + 1));
})
.on('mouseleave', function() {
var $me = $(this);
var $parent = $me.parents('.rating-holder');
var my_index = $me.index();
var rated = $parent.attr('data-rated');
$parent.removeClass(function(index, css) {
return (css.match (/(^|\s)rate-\S+/g) || []).join(' ');
});
if(rated !== undefined) {
$parent.addClass('rate-' + rated);
}
})
.on('click', function() {
var $me = $(this);
var $parent = $me.parents('.rating-holder');
var my_index = $me.index();
$('.rating-real-value').val(my_index + 1);
$parent.attr('data-rated', my_index + 1);
$parent.addClass('rate-' + (my_index + 1));
});
}
setTimeout(function() {
masonry();
}, 500);
}
});
}
There's a great plugin for scrolling. He has methods such as bund, unbind, destroy and e.t.c.:
https://github.com/infinite-scroll/infinite-scroll#methods

JQuery - where to add .on()/.live() to function?

var refreshId = setInterval(function() {
$('#livelist').load('/scripts/livelist.php', { guestlist:'<?php echo $_GET['guestlist']; ?>'});
}, 5000);
$.ajaxSetup({ cache: false });
I know I need to attach the .live() event handler to prevent the function from triggering other events (what's currently happening), but where do I add it?
Full Script:
$(document).ready(function() {
$("input#name").select().focus();
$('#livelist').load('/scripts/livelist.php', { guestlist:'<?php echo $_GET['guestlist']; ?>'});
var refreshId = setInterval(function() {
$('#livelist').load('/scripts/livelist.php', { guestlist:'<?php echo $_GET['guestlist']; ?>'});
}, 5000);
$.ajaxSetup({ cache: false });
$("input#name").swearFilter({words:'bob, dan', mask:"!", sensor:"normal"});
var tagCheckRE = new RegExp("(\\w+)(\\s+)(\\w+)");
jQuery.validator.addMethod("tagcheck", function(value, element) {
return tagCheckRE.test(value);
}, "");
$("#addname").validate({
invalidHandler: function(form, validator) {
var errors = validator.numberOfInvalids();
if (errors) {
$('#naughty').fadeIn('fast');
$('#naughty').delay('1000').fadeOut('fast');
} else {
$('#naughty').hide();
}
}
});
$('#showall').live('click', function() {
$('#showall').hide();
$('div#shownames').slideDown('fast');
});
jQuery(document).ajaxStart(function(){
$("input#name").blur();
$('#working').show();
$('#event-box').fadeTo('fast', 0.5);
})
var names = '';
var dot = '.';
$('#addname').ajaxForm(function() {
var options = {
success: function(html) {
/* $("#showdata").replaceWith($('#showdata', $(html))) */
var value = $("input#name").val().toUpperCase();;
$("span.success").text(value);
if (names == '') {
names = value;
}
else {
names = ' ' + value + ', ' + names;
$("span#dot").text(dot);
}
$("span#name1").text(names);
$('#working').fadeOut('fast');
$('#success').fadeIn('fast');
$('#added-names').fadeIn('fast');
$('#success').delay('600').fadeOut('fast');
$("input#name").delay('1200').select().focus();
$('#event-box').delay('600').fadeTo('fast', 1.0);
$(':input','#addname')
.not(':button, :submit, :reset, :hidden')
.val('')
},
cache: true,
error: function(x, t, m) {
if(t==="timeout") {
$('#working').fadeOut('fast');
$('#fail').fadeIn('fast');
$('#fail').delay('600').fadeOut('fast');
} else {
$('#working').fadeOut('fast');
$('#fail').fadeIn('fast');
$('#fail').delay('600').fadeOut('fast');
alert(t);
}
}
}
$(this).ajaxSubmit(options);
$('body').select().focus();
});
$("input").bind("keydown", function(event) {
var keycode = (event.keyCode ? event.keyCode : (event.which ? event.which : event.charCode));
if (keycode == 13) {
document.getElementById('#submit').click();
return false;
} else {
return true;
}
});
});
The ajaxForm function is being triggered using my current implementation.
The fault:
jQuery(document).ajaxStart(function(){
$("input#name").blur();
$('#working').show();
$('#event-box').fadeTo('fast', 0.5);
})
As .ajaxStart() is a global parameter, it was being triggered during every AJAX call, including .load(), I'm surprised no one spotted it.

Calling jQuery Function from Flash

I'm trying to call an external JS function from flash using the ExternalInterface.call() method in action script. The function should open a modal window that has been written in jQuery. My problem is two fold:
How do I open this modal window without attaching the action to a link? I just want the window open and to pass in the URL.
Is there a better way to do this?
(Code below - I only included the relevent functions. If more if needed, let me know)
ActionScript:
import flash.external.ExternalInterface;
function openMapWindowLink(thingName):Void {
ExternalInterface.call("openMapWindow",locationURL);
}
jQuery:
// Add the action to a link (this works)
function initAjaxPopups() {
$('.ajax-popup').simpleLightbox({
closeLink:'a.btn-close, a.close-popup',
faderOpacity: 0.7,
faderBackground: '#000',
href:true,
onClick: null
});
}
// Open the lightbox from flash with url (not working correctly)
function openMapWindow(locationURL) {
//alert('Clicked '+locationURL);
$simpleLightbox({
closeLink:'a.btn-close, a.close-popup',
faderOpacity: 0.7,
faderBackground: '#000',
href:locationURL,
onClick: null
});
}
/* ajax lightbox plugin */
jQuery.fn.simpleLightbox = function(_options){
var _options = jQuery.extend({
lightboxContentBlock: '.lightbox',
faderOpacity: 0.8,
faderBackground: '#ffffff',
closeLink:'a.close-btn, a.cancel',
href:true,
onClick: null
},_options);
var _popupCounter = 1;
return this.each(function(i, _this){
var _this = jQuery(_this);
if (!_options.href)
_this.lightboxContentBlock = _options.lightboxContentBlock;
else _this.lightboxContentBlock = _this.attr('href');
if (_this.lightboxContentBlock != '' && _this.lightboxContentBlock.length > 1) {
_this.faderOpacity = _options.faderOpacity;
_this.faderBackground = _options.faderBackground;
_this.closeLink = _options.closeLink;
var _fader;
var _lightbox = $(_this.lightboxContentBlock);
if (!jQuery('div.lightbox-fader').length)
_fader = $('body').append('<div class="lightbox-fader"></div>');
_fader = jQuery('div.lightbox-fader');
_lightbox.css({
'zIndex':999
});
_fader.css({
opacity:_this.faderOpacity,
backgroundColor:_this.faderBackground,
display:'none',
position:'absolute',
top:0,
left:0,
zIndex:998,
textIndent: -9999
}).text(' ');
_lightbox.shownFlag = false;
_this.click(function(){
if (jQuery.isFunction(_options.onClick)) {
_options.onClick.apply(_this);
}
var _popupURL = _this.attr('href');
if(jQuery('div[rel*="'+_popupURL+'"]').length == 0) {
$.ajax({
url: _popupURL,
global: false,
type: "GET",
dataType: "html",
success: function(msg){
// append loaded popup
_lightbox = $(msg);
_lightbox.attr('rel',_popupURL).css({
zIndex:999,
position:'absolute',
display:'block',
top: -9999,
left: -9999
});
_lightbox.attr('id','ajaxpopup'+_popupCounter);
jQuery('body').append(_lightbox);
// init js for lightbox
if(typeof initPopupJS == "function"){
initPopupJS(_lightbox);
}
_popupCounter++;
// attach close event
jQuery(_this.closeLink, _lightbox).click(function(){
_lightbox.fadeOut(400, function(){
_fader.fadeOut(300);
_scroll = false;
});
return false;
});
// show lightbox
_lightbox.hide();
_lightbox.shownFlag = true;
jQuery.fn.simpleLightbox.positionLightbox(_lightbox);
_fader.fadeIn(300, function(){
_lightbox.fadeIn(400);
jQuery.fn.simpleLightbox.positionLightbox(_lightbox);
if(typeof VSA_handleResize === 'function') {
VSA_handleResize();
}
});
},
error: function(msg){
alert('ajax error');
return false;
}
});
} else {
_lightbox = jQuery('div[rel*="'+_popupURL+'"]');
_lightbox.hide();
_lightbox.shownFlag = true;
jQuery.fn.simpleLightbox.positionLightbox(_lightbox);
_fader.fadeIn(300, function(){
_lightbox.fadeIn(400);
jQuery.fn.simpleLightbox.positionLightbox(_lightbox);
if(typeof VSA_handleResize === 'function') {
VSA_handleResize();
}
});
}
return false;
});
jQuery(_this.closeLink).click(function(){
_lightbox.fadeOut(400, function(){
_fader.fadeOut(300);
_scroll = false;
});
return false;
});
_fader.click(function(){
_lightbox.fadeOut(400, function(){
_fader.fadeOut(300);
});
return false;
});
var _scroll = false;
jQuery.fn.simpleLightbox.positionLightbox = function (_lbox) {
if(!_lbox.shownFlag) return false;
var _height = 0;
var _width = 0;
var _minWidth = $('body > div:eq(0)').outerWidth();
if (window.innerHeight) {
_height = window.innerHeight;
_width = window.innerWidth;
} else {
_height = document.documentElement.clientHeight;
_width = document.documentElement.clientWidth;
}
var _thisHeight = _lbox.outerHeight();
var _page = $('body');
if (_lbox.length) {
if (_width < _minWidth) {_fader.css('width',_minWidth);} else {_fader.css('width','100%');}
if (_height > _page.innerHeight()) _fader.css('height',_height); else _fader.css('height',_page.innerHeight());
if (_height > _thisHeight) {
if ($.browser.msie && $.browser.version < 7) {
_lbox.css({
position:'absolute',
top: (document.documentElement.scrollTop + (_height - _thisHeight) / 2)+"px"
});
} else {
_lbox.css({
position:'fixed',
top: ((_height - _lbox.outerHeight()) / 2)+"px"
});
}
}
else {
var _fh = parseInt(_fader.css('height'));
if (!_scroll) {
if (_fh - _thisHeight > parseInt($(document).scrollTop())) {
_fh = parseInt($(document).scrollTop())
_scroll = _fh;
} else {
_scroll = _fh - _thisHeight;
}
}
_lbox.css({
position:'absolute',
top: _scroll
});
}
if (_width > _lbox.outerWidth()) _lbox.css({left:((_width - _lbox.outerWidth()) / 2 + 10) + "px"});
else _lbox.css({position:'absolute',left: 0});
}
}
jQuery(window).resize(function(){
if (_lightbox.is(':visible'))
jQuery.fn.simpleLightbox.positionLightbox(_lightbox);
});
jQuery(window).scroll(function(){
if (_lightbox.is(':visible'))
jQuery.fn.simpleLightbox.positionLightbox(_lightbox);
});
jQuery.fn.simpleLightbox.positionLightbox(_lightbox);
$(document).keydown(function (e) {
if (!e) evt = window.event;
if (e.keyCode == 27) {
_lightbox.fadeOut(400, function(){
_fader.fadeOut(300);
});
}
});
}
});
}
If attaching lightBox to something which isn't a link it should be
$.simpleLightbox({...}) // with the "." after $
IF that doesnt work you could alter the lightBox plugin source, but this could be troublesome if you wish to update to a newer versions later.
This is a workaround that should work:
<a class="hidden" id="dummylink" href="#">&nbsp</a>
//on ready
$('#dummylink').simpleLightbox({...});
function openMapWindow(locationURL) {
$("#dummylink").attr("href", locationURL).trigger('click');
}

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