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Load specific parts of (WordPress) next posts page via AJAX

What I'm trying to do exactly
I'm creating a custom WordPress site, it displays a "load more posts" button in the pages blog (main), category and search results. When the user clicks this button, the script retrieves the posts in the next page and appends them inside a container. Here's the code:
<script>
document.addEventListener("DOMContentLoaded", function() {
// display or not the btn when page is loaded
var morePosts = $("#dom-target").text();
if (morePosts != "true") {
$('.load-more').css('display','none');
}
// button functionality
var pageIndex = 1;
var numOfPages = Number($('#numOfPages').text()); // parsed from php
var nextLink = $('#nextLink').text(); // parsed from php
$('.load-more').click(function(){
if (pageIndex < numOfPages) {
var nextPosts;
$.get(nextLink+' .post-card', function(data){
// get articles in next page
nextPosts = data;
// append articles
$('#content').append(nextPosts);
// change value of index and redefine nextLink
pageIndex++;
nextLink = nextLink.replace(pageIndex+'/',pageIndex+1+'/');
// check if button display is still needed
if (pageIndex == numOfPages) {
$('.load-more').css('transition','all 0s');
$('.load-more').fadeOut();
}
});
}
});
});
</script>
The problem: It loads the entire page
I wonder if $.get() has a equivalent for .load('main url .specific-class'), because when I try to apply the analogous syntax
$.get(nextLink+' .post-card')
the console threw me
GET http://localhost/blog/page/2/%20.post-card 404 (Not Found)
Or if there is a way to parse the data (a string) as an HTML document (so I can apply jQuery to the variable that stores the data and get just the post cards instead of the entire page).
Thanks in advance! :)

You have to parse the response yourself which you can do simply by wrapping in $() and using any jQuery method on
$.get(nextLink, function(data){
var nextPosts = $(data).find('.post-card');
$('#content').append(nextPosts);
//.......
});

Email current page button, include part of div

I want to get not just the title and the url from my page when using the recomment by email button, but also part of the content.
I have this function:
function emailCurrentPage(){
var doc = window.document;
var requested_div = document.getElementById('single_page');//the div is called single_page
var requested_div_html = requested_div.innerHTML;
window.location.href="mailto:?subject="+document.title+"&body="+escape(window.location.href)+doc.requested_div_html;
}
</script>
The issue is that I get undefined from doc.requested_div_html. Link and title work well.

I think the error is that doc.requested_div_html is undefined, since you stored the HTML of the requested div in requested_div_html, not doc.request_div_html. It's just wrong variables.

I finally solved it like this:
function emailCurrentPage(){
var log = $('#single_page').find('p')[ 0 ];
var requested_div = log.innerHTML;
window.location.href="mailto:?subject="+document.title+"&body="+"URL Articol: "+escape(window.location.href)+" - Incipit articol:"+requested_div;
}
I didn't need the doc element because it is already said window.location

How to combine ContentFlow and ColorBox

I am trying to combine ContentFlow (http://jacksasylum.eu/ContentFlow/) and ColorBox (http://www.jacklmoore.com/colorbox/): when the user clicks on an image in ContentFlow I want an HTML page to be displayed in ColorBox.
I have tried using the code provided by the ColorBox examples' section to no avail. The HTML page is loaded by the browser as a normal link (not in ColorBox.)
I have even tried creating a ContentFlow addon (using the LightBox addon as an example) without any luck - nothing is displayed, not even simple images:
onclickActiveItem: function (item) {
var content = item.content;
if (content.getAttribute('src')) {
if (item.content.getAttribute('href')) {
item.element.href = item.content.getAttribute('href');
}
else if (! item.element.getAttribute('href')) {
item.element.href = content.getAttribute('src');
}
if (item.caption)
item.element.setAttribute ('title', item.caption.innerHTML);
colorbox.show(item.element);
}
}
Edited on 01/Oct/2013
The problem only manifests itself when an item contains an href. To prove this I changed the code above to show a static web page:
$.colorbox({open:true, href:"http://mysite.gr/colorbox/content/static.html"});
It the item is just a simple image the static web page is displayed in ColorBox. But if the item contains an href to the web page I want displayed in ColorBox the browser follows the link and loads the specified page. Any ideas on how to stop this from happening?
Thank you in advance for your help!

I have finally solved the problem I have described in my question. The solution involves creating a ContentFlow addon as follows:
new ContentFlowAddOn ('colorbox', {
init: function () {
var colorboxBaseDir = this.scriptpath+"../colorbox/";
var colorboxCSSBaseDir = colorboxBaseDir;
var colorboxImageBaseDir = colorboxBaseDir;
this.addScript(colorboxBaseDir+"jquery.colorbox.js");
this.addStylesheet(colorboxCSSBaseDir+"example3/colorbox.css");
},
ContentFlowConf: {
onclickInactiveItem: function (item) {
this.conf.onclickActiveItem(item);
},
onclickActiveItem: function (item) {
var content = item.content; // ContentFlow's content class
var theItem = item.item; // ContentFlow's item class - if you need access to it
var hrefToDisplay = '';
if (content.getAttribute('src')) {
if (content.getAttribute('href')) {
hrefToDisplay = item.content.getAttribute('href');
}
else if (!item.element.getAttribute('href')) {
hrefToDisplay = content.getAttribute('src');
}
$.colorbox({iframe:true, href:hrefToDisplay, title:item.caption});
}
}
}
});
The secret is to open the HTML page in an iframe.
Hope this helps!

Cycle through a list of html files with button

I have a list of products say:
laptops/prod1.html
laptops/prod2.html
laptops/prod3.html
monitors/prod1.html
monitors/prod2.html
monitors/prod3.html
I would like a button on my page that 'cycles' through the available items.
No idea how to do this. Is this possible with javascript?

function nextProduct(incr) {
var href = window.location.href
, offset = (typeof(incr)==='undefined' ? 1 : incr);
window.location = href.replace(/(\d+)\.html/, function(m, g1) {
return (Number(g1) + offset) + '.html'
});
}
Then you can do something like:
var button;
button = document.getElementByID('next-button');
button.addEventListener('click', function() { nextProduct(1); });
button = document.getElementByID('prev-button');
button.addEventListener('click', function() { nextProduct(-1); });

Setup a main page, this should not be a static html page but in your server side language of choice.
Include jquery to a main page using a script tag (you can get jquery from http://jquery.com/).
Your html could look like this:
<div id='content'></div>
<div>
<a href='javascript:void(0)' id='prev' class='btn'>Previous</a>
<a href='javascript:void(0)' id='next' class='btn'>Next</a>
</div>
In your js file you would have something like this:
var currPage = 0;
var pageList = ["laptops/prod1.html","laptops/prod2.html", "laptops/prod3.html"];
var totalPages = pageList.length;
$(".btn").on("click",function(){
//if we are at the last page set currpage = 0 else increment currPage.
currPage = currPage < (totalPages - 1) ? ++currPage : 0;
var page = pageList[currPage];
$('#content').load(currPage);
});
Some points to consider:
You will want to decide if the first page gets loaded on the main page load or on click
You will need to set a js variable to keep track of the currently loaded page
You will need to add some method of storing all the possible pages (think an array). This can get printed out to a script tag on the page on page load.
You need to decide what happens when you hit the end of the line. You can either cycle around or grey out the appropriate link.
jquery on
jquery load

JavaScript previous and next buttons to cycle through an array of .js files

I am having difficulty writing some JavaScript that will cycle through an array of .js files.
I have some JavaScript widgets saved in .js files.
I want to be able to click a "Next" or "Previous" button to cycle through an array of those .js files and have the widgets called and displayed on my HTML page. They can be displayed in an iFrame if that would be a better solution.
I will continue researching until a kind soul helps out. Thanks a bunch in advance!
I have tried:
<script>
function onWindowLoad(){
document.getElementById('js_type').innerHTML = ****.settings.type;
var widget_arr = [1column.js,2column.js,1row.js,modal.js]; //etc..etc..
var currentWidget = 0;
theBtn.onRelease = function(){
currentWidget++;
if(currentWidget == widget_arr.length){
currentWidget=0;
}
var selectedWidget = widget_arr[currentWidget];
//now you have a variable pointing to the next widget..
//what you do with it is up to you.. add the code you need..
}
and this
<SCRIPT LANGUAGE="JavaScript">
<!--
// Use the following variable to specify
// the number of widgets
var NumberOfWidgets = 4
var widget = new Array(NumberOfWidgets)
// Use the following variables to specify the widget names:
widget[0] = "1column.js"
widget[1] = "2column.js"
widget[2] = "1row.js"
widget[3] = "modal.js"
var widgetNumber = 0
function NextWidget()
{
widgetNumber++
if (widgetNumber == NumberOfWidgets)
widgetNumber = 0
document.widgets["VCRWidget"].src = widget[widgetNumber]
}
function PreviousWidget()
{
widgetNumber--
if (widgetNumber < 0)
widgetNumber = NumberOfWidgets - 1
document.widgets["VCRWidget"].src = widget[widgetNumber]
<IMG SRC="modal.js" NAME="VCRWidget">
}
//-->
</SCRIPT>
Code for the previous and next buttons:
<A HREF="javascript:PreviousWidget()">
<IMG SRC="prev.png" BORDER=0></A>
<A HREF="javascript:NextWidget()">
<IMG SRC="next.png" BORDER=0></A>

One idea can be to use the fact thst even a static page can have parameters in the url. You can for example:
create the html page that will be opened in the <iframe> with any js include you need (e.g. jquery)
add to this page a js function that given a widget js filename will create a <script> tag loading the widget creation code.
extract the name of the js file to use to call the function in (2) from document.location.href by looking at the part of the string after ?
in your main page create dinamically the iframe using for example contdiv.innerHTML = "<iframe src=\"widgetpage.html?" + widgetname + ".js\"></iframe>";
With this approach the widgets will be shown in a separate html page without interferring with your main page.