js / jquery function call order not reflected in result - javascript

EDIT:
Alright, to help resolve this, I've put up the example online:
http://lodge323.com/test/index.html
The example works as intended, but it doesn't have the content that I want on it. Note that this apparently only happens on FF13 and not IE9.
Steps to recreate the problem:
-Ctrl+F5 to reload the page (overriding cache).
-Using Firebug (addon for FF), change 1.jpg to head.gif
-Click on the Inventory menu tab on the right
Notice how there's a gap between the menu and the bottom which doesn't happen if 1.jpg is used. So question is, how can I get that gif image to work properly with the page?

jQuery's load is asynchronous.
Instead of calling loadSidebar after loadContent, pass it as a callback to load:
$(document).ready(function() {
$(".tabs a").click(function() {
loadContent('#ContentDiv', this, '.tabs a', 'id', loadSidebar);
});
});
function loadContent(divTarget, elm, selector, attr, callback) {
$(divTarget).load($(elm).attr(attr) + ' #ContentLoad', callback);
}
This will call loadSidebar, when the content has finished loading, instead of immediately after it starts loading.
Check out Understanding Callback Functions in Javascript. It might help you understand why the callback is needed.
Edit
As Eric pointed out it the comments you are also storing a url in an id. You should instead store it in the href attribute of the anchor. Then you can just return false from your click handler to avoid the entire page being loaded:
$(document).ready(function() {
$(".tabs a").click(function() {
loadContent('#ContentDiv', this, '.tabs a', 'href', loadSidebar);
return false;
});
});

Related

How to hide loader when there is no more page to be loaded

In this website that I am building https://vase.ai/blog/ , I am using a script of infinite scrolling to make several pages into one page for scrolling.
I would like to hide the loader(the spinning one) when there is no more page to be loaded. I figured that the following code might be able to help me to detect the error (Failed to load resource: the server responded with a status of 404 (Not Found)) and execute the hiding. However, it does not work. Am I missing something out?
window.addEventListener('error', function(e) {
$('loading').fadeOut()
}, true);
Code that I use to to load more :
//implementing infinite scrolling
$grid.infinitescroll({
// Pagination element that will be hidden
navSelector: '.pagination',
// Next page link
nextSelector: '.pagination a',
// Selector of items to retrieve
itemSelector: '.grid-blog',
},
// Function called once the elements are retrieved
function(new_elts) {
var elts = $(new_elts).css('opacity', 0);
elts.animate({opacity: 1});
$grid.packery('appended', elts);
$('.target-resize').textfill({
maxFontPixels: 36,
changeLineHeight:false
})
$grid.packery({
itemSelector: '.grid-blog',
gutter: 20,
})
});
It's difficult to answer your question without the code that make the http calls in order to load your content. But,
1) you may have an error, and still have contents to be loaded, in that case your loader will disappear even if contents are still loading.
2) You should have something that tel your site what you have to load.
an array of url, or anything, you can maybe use this to hide your loader when all contents has been loaded.
3) You should have somewhere a function that make httpcalls to get your content. This function should have a callback. In this callback, you should be able to catch an error, and then hide your loader.
I cannot give you more informations with the amount of code you show in your exemple.
edit : after looking at your code, you may try to do :
// Function called once the elements are retrieved
function(new_elts) {
if(!new_elts) {
$('loading').fadeOut();
return;
}
...
}
I don't think this is the right solution, your plugin should have a built-in function to stop calling new pages, but since I don't see the function that make the http call, or any array/iterator of URLs, it's difficult top help you.
you should check this demo to : https://codepen.io/desandro/pen/rwwoGe

Ajax loaded part of a page - how do I make links in the loaded content work?

I load a part of my basketpage inside an accordion div in my header. This works great and shows my basket in a nice dropdown.
The last problem I need to solve with this is to get the buttons in the loaded content to work. Is it possible to write an callback that make these works? Im not sure even what to google for this one..
This is how the buttons is setup in the loaded content:
checkout
Script Im using to load the content:
$('.dcjqg-accordion ul.sub-menu').load('/m4n?seid=etailer-basket div#centerbox.itembox.centerbox');
use the callback function of .load().
$('.dcjqg-accordion ul.sub-menu').load('/m4n?seid=etailer-basket div#centerbox.itembox.centerbox', function() {
$("#_ec_oie2").on("click", function() {
if (UI.pb_boolean(this, 'click')) { }
return false;
});
});
checkout
You need to use a child selector for the event. You can attach an event to the .sub-menu element that will fire on the content loaded in through the ajax. Something like the following could work:
$(".dcjqg-accordion ul.sub-menu").on("click", ".action.actionbasket.checkout", function() {
if( UI.pb_boolean(this, 'click') ) {}
return false;
});
Notice the second parameter to the on method. It is a selector that will be used to look at the target of the click event. I used .action.actionbasket.checkout since that is what is on your a tag.
This code may not work exactly, but this should help get you in the right direction.
Here is the link to the jQuery documentation for the on method: https://api.jquery.com/on/

Javascript won't load using jQuery Mobile with navigation-geolocation

I am having an issue with jQuery Mobile, javascript and get geolocaton.
I am currently using following to get the code to load, when I enter the page:
$(document).on('pageinit', function(){
If the user has set visibility to visible, a div with the ID visible is shown, this I use to call the geolocation the first time:
if ($('#visible').length) {
navigator.geolocation.getCurrentPosition(sucessHandler, errorHandler);
}
After this I call the geolocation every 20th second:
setInterval(function() {
if ($('#visible').length) {
navigator.geolocation.getCurrentPosition(sucessHandler);
}
}, 20000);
My issue is, if I leave the page for one of the subpages, and return to this page, these codes won't run again. I have tried the following to load the javascript, instead of pageinit:
$(document).on('pagebeforeshow', '#index', function(){
and
$(document).on('pageinit', '#index', function()
I tried loading it in the body of the index as well.
Any help would be greatly appreciated =)
Regards, Fred
Firstly, you may want to consider replacing navigator.geolocation.getCurrentPosition() with navigator.geolocation.watchPosition(). This will call your success or error handler functions each time the device receives a position update, rather than you needing to ping it every 20 seconds to see if it has changed.
With regard to page changing, so long as you’re using a multi-page template, then the handler function should get called while navigating to and from any sub-pages.
Here’s a JS fiddle illustrating this
Hope this helps!

Ajax inserted content not accessible in DOM

I am working on a pure jquery/js site, mostly to practice some jquery. I am using a load statement to load a menu from a file of common html, like so:
$('#categoryListing').load('../common.html #categoryLinksUL');
which loads:
<ul id="categoryLinksUL">
<li>Anklets</li>
<li>Bracelets</li>
</ul>
The problem is where I am using it now I need to alter the href of the above links, but they are not part of the dom. In previous instances I was able to use .live(click... But not here. Is there a way I can accomplish this?
Specifically I need to load the links and change the href from #anklets to ?category=anklets
What about the following?
$('#categoryListing').load('../common.html #categoryLinksUL', function() {
$('li a[href^="#"']').each(function () {
this.href = '?category=' + this.href.substr(1);
});
});
In my example, after the load is completed, the anonymous function is called. It takes every anchor with a hash HREF and replaces it with an HREF based on your description.
Thank you Dimitry, you solution basically worked. I finally used:
$('#categoryListing').load('../common.html #categoryLinksUL', function() {
$('#categoryListing li a').each(function () {
var hashPos=this.href.indexOf("#");
var tCategory = this.href.substr(hashPos+1,this.href.length );
});
});
So why did jQuery recognize categoryListing there? I tried moving the each function outside of the load function and categoryListing did not contain any links. Is it because maybe the load was not completed when it tried to get categoryListing links? Seems like that is possible.
Thanks,
Todd

jQuery load-event after replaceWith

i'm trying to ajax load some content and then replace existing content on the page with the newly downloaded content. The problem is that I need to bind load(handler(eventObject)) event for replaced data. I need that to trigger when all images are loaded. Here is what I have so far:
$("#mainContentHolder").live("load", function(){
alert("images loaded!")
});
$.get("content.htm", function(data){
$("#mainContentHolder").replaceWith(data);
alert("content is loaded!");
});
I see an alert when the content is loaded, but it happens before images are loaded and alert on images load never happens (I also tried bind() instead of live() before).
Does anyone know a fix for that?
This may or may not be your problem, but it looks like the container you have attached your image load function to is being replaced when you load the ajax content:
$("#mainContentHolder").live("load", function(){ //you are attaching to current and future '#mainContentHolder' elements
alert("images loaded!")
});
$.get("content.htm", function(data){
$("#mainContentHolder").replaceWith(data); //'#mainContentHolder' element is replaced with something else
alert("content is loaded!");
});
Not sure what content is coming back from your AJAX call, but if it doesn't have a #mainContentHolder element, there will be nothing for your image load event handler to attach to.
If that's not it, there's also this bit: (from http://api.jquery.com/load-event/)
It is possible that the load event will not be triggered if the image is loaded from the browser cache. To account for this possibility, we can use a special load event that fires immediately if the image is ready. event.special.load is currently available as a plugin.
Hopefully one of those will help you out.
Is it possible to put the $.get into the live load function?
$("#mainContentHolder").live("load", function(){
alert("images loaded!");
$.get("content.htm", function(data){
$("#mainContentHolder").replaceWith(data);
alert("content is loaded!");
});
});

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