Develop Reference

How can I reuse a cloned element?

I have a Bootstrap modal on my page. Basically, what happens is the user picks some options on the page, clicks a go button and that modal pops up and gets populated with the live output of the job they started.
After the job runs, I'd like for the user to be able to close the modal, choose more options, and run the job again. The problem is, I can't seem to get rid of the output from the previous job.
I tried this answer, which was to clone the div and use replaceWith() to restore the content to it's original state. This works for the first two times (job runs once, then when you start another the modal is back to it's original state), but for any time after that, the modal pops up with the content of the previous run until it's text gets overridden.
I have this at the beginning, to capture the contents before anything is done:
$(document).ready(function() {
modalHold = $("#postModal").clone();
});
And, this runs when the modal closes:
$('#postModal').on('hidden.bs.modal', function (){
$("#postModal").replaceWith(modalHold.clone());
})
I would've expected the replaceWith(modalHold.clone()) to replace it with a new clone of the original element, however it seems that I'm still modifying the original. Any help would be appreciated, or if there's a better way of doing this I'd be glad to hear it.

Bootstrap does some javascript magic with the Modal, so I guess you can't just clone whole the Modal's HTML. As a workaround you may try to play with class="modal-body" node only, clone and replace it.
But the truth is on another way. You need to implement a function which would reset your inputs and call it each time the Modal is being hidden.
var modalDefault = {
input1: '',
input2: 'Hello!'
};
var resetModal = function() {
$('#modalInput1').val(modalDefault.input1);
$('#modalInput2').val(modalDefault.input2);
}
// ...
$('#postModal').on('hidden.bs.modal', resetModal);

Not sure why I didn't think of this to begin with, but dhilt's answer helped point me in the right direction. The idea of creating defaults and just switching back to those could be helpful in some cases, but I had some content (including job info and a loading bar) inside the modal that I'd really like to be displayed each time a job starts, until it is done and the output can be displayed.
Instead of doing any fancy cloning, I placed that content into a div and just grabbed its innerHTML:
$(document).ready(function() {
modalHold = $('#jobOutputHolder').html();
});
When the .load () runs, it will update #jobOutputHolder with the output of the job. Then, on hide of the modal:
$('#postModal').on('hidden.bs.modal', function (){
$('#jobOutputHolder').html(modalHold);
})
With this method, I can run a job, see the loading screen, see the job output, close the modal, and repeat as many times as I need without ever seeing the output of previous jobs.

reload php page with javascript

I have drawn a chess board in a php page. Every piece is set as draggable, and every tile as droppable. Once a piece is dropped on a tile, I'd like to reload the php page so the board can be drawn anew along with new positions.
How can I do that: reloading the php page with javascript, without displaying a window asking for confirmation such as "To display this page, Firefox must send information that will repeat any action (such as a search or order confirmation) that was performed earlier. ->Cancel; Resend" ?
Or perhaps there are better solutions?

If you want to avoid having refresh reporting data (for any reason, including the user clicking the reload button) then use the POST-REDIRECT-GET pattern (http://en.wikipedia.org/wiki/Post/Redirect/Get). Read that, it will explain what to do.
Quick solution: you could try:
window.location.reload(true); //true sets request type to GET
Use GET, instead of POST and the dialog box you are getting will go away.
Good luck!

Make use of
window.location.reload();

will refresh automatically
<script>
var timer = null;
function auto_reload()
{
window.location = 'http://domain.com/page.php'; //your page location
}
</script>
<!-- Reload page every 10 seconds. -->
<body onload="timer = setTimeout('auto_reload()',10000);">
reference http://davidwalsh.name/automatically-refresh-page-javascript-meta-tags

Autorefresh DIV, No PHP

I want to autorefresh a div on this page: http://americanart.si.edu/index_newsplash3r.cfm ("Places to Explore" area). Right now we have 3 different images and text that arbitrarily display when you reload the page. I'd like these elements to change automatically, without reloading the page.
The page is done in Coldfusion 9. Most AJAX autorefresh code assumes you're using PHP.
Does anyone have a link to code I could use to do this without PHP? I don't think it's necessary that it be Coldfusion code.
Thanks.

You can setup an Ajax call to the server side to get the photo path and the text.
Something like this.
$(function(){
function FillDivAtRandom(current){
setTimeout(function(){
//pass the current place to explore id to the server so you don't get the same back, if none then return anyone.
$.post("http://americanart.si.edu/Request/PlacesToExploreNext", current, function(data){
//fill the div with new data return from server
//you don't seem to have an ID on that div or elements so put one on it first then use it as a selector
//set the image
$('#placestoexplore_image').attr('src', data.image);
//set the text
$('#placestoexplore_description').html(data.description);
});
//call the function again
FillDivAtRandom(current);
}, 10000);
}
}

Adding an extra button in facebook post using google chrome extension

I was successful to track all "uiStreamSource" that holds the link associated with each facebook post (status, image, etc) to add one extra button next to the date to do some other tasks using google chrome extensions. This button does a predefined job which not important to mention in this context.
I wrote this content script:
contentscript.js
var nodeslist=document.getElementsByClassName("uiStreamSource");
alert(nodeslist.length);
Each time a facebook page is loaded, the alert shows me 10 detected classes (i.e., 10 posts). But when I scroll down, new posts show up and this code fails to detect them. Since I need to update all uiStreamSource nodes in all posts, how can I solve this?
UPDATE
I tried this code in contentscript.js:
load();
document.addEventListener("DOMNodeInsertedIntoDocument", load, false);
function load(){
var nodeslist=document.getElementsByClassName("uiStreamSource");
alert(nodeslist.length);
}
The first time it runs, I get the correct number of the current nodes (current facebook posts) but once I scroll down and more posts are fetched, the alert shows up indicating that load function is called but the number of nodes printed is 0. Why is that?
Thanks on advance.

You can add a DOMNodeInserted event and check if the element that is going to be inserted is a post by checking its classes.
Or an easy solution is to use the jcade plugin. It can call a callback function when an element with specified selector is inserted.

Listen to the scroll event and add any new posts to nodeslist. You could use setInterval as well to catch any posts that are added when the user is not scrolling.

jQuery code repeating problem

I have a piece of code in jQuery that I use to get the contents of an iFrame after you click a link and once the content is completed loading. It works, but I have a problem with it repeating - at least I think that is what it is doing, but I can't figure out why or how.
jQuery JS:
$(".pageSaveButton").bind("click",function(){
var theID = $(this).attr("rel");
$("#fileuploadframe").load(function(){
var response = $("#fileuploadframe").contents().find("html").html();
$.post("siteCreator.script.php",
{action:"savePage",html:response, id: theID},
function(data){
alert(data);
});
});
});
HTML Links ( one of many ):
<a href="templates/1000/files/index.php?pg=0&preview=false"
target="fileuploadframe" class="pageSaveButton" rel="0">Home</a>
So when you click the link, the page that is linked to is opened into the iframe, then the JS fires and waits for the content to finish loading and then grabs the iframe's content and sends it to a PHP script to save to a file. I have a problem where when you click multiple links in a row to save multiple files, the content of all the previous files are overwritten with the current file you have clicked on. I have checked my PHP and am pretty positive the fault is with the JS.
I have noticed that - since I have the PHP's return value alerted - that I get multiple alert boxes. If it is the first link you have clicked on since the main page loaded - then it is fine, but when you click on a second link you get the alert for each of the previous pages you clicked on in addition to the expected alert for the current page.
I hope I have explained well, please let me know if I need to explain better - I really need help resolving this. :) (and if you think the php script is relevant, I can post it - but it only prints out the $_POST variables to let me know what page info is being sent for debugging purposes.)
Thanks ahead of time,
Key

From jQuery .load() documentation I think you need to change your script to:
$(".pageSaveButton").bind("click",function(){
var theID = $(this).attr("rel");
var lnk = $(this).attr("href");//LINK TO LOAD
$("#fileuploadframe").load(lnk,
function(){
//EXECUTE AFTER LOAD IS COMPLETE
var response = $("#fileuploadframe").contents().find("html").html();
$.post("siteCreator.script.php",
{
action:"savePage",
html:response,
id: theID
},
function(data){alert(data);}
);
});
});
As for the multiple responses, you can use something like blockui to disable any further clicks till the .post call returns.

This is because the line
$("#fileuploadframe").load(function(){
Gets executed every time you press a link. Only add the loadhandler to the iframe on document.ready.

If a user has the ability via your UI to click multiple links that trigger this function, then you are going to run into this problem no matter what since you use the single iframe. I would suggest creating an iframe per save process, that why the rendering of one will not affect the other.