Develop Reference

How to set a maximum amount of clicks on an order button for each item specifically? (JavaScript)

I'm trying to implement a functionality where the user can only order a set amount of times (let's take 5 times for example) before an alert shows up saying that the product he is trying to order has ran out of stock.
He can still of course, order other product that haven't been clicked on 5 times.
The problem I'm facing is that I don't know how to keep count of each order button (an anchor acting as a button) specifically.
I tried implementing that functionality and it does show an alert, but it takes count of all order buttons clicked.
This is how my functions looks:
let counter = 0; //global variable
function order_func() {
let every_product= document.querySelectorAll(".all_prods");
for (let each_prod = 0; each_prod < every_product.length; each_prod++) {
every_product[each_prod].addEventListener("click", function (e) {
if(count_stuff < 10){
add_it(e, each_prod); //e to preventDefault() and console.log "each_prod"
count_stuff++;
}else{
out_of_stock(e); //shows the alert it takes the event as argument to prevent default behavior.
}
});
}
}
add_it() is just a function that console.log()'s the product.
I'm only using vanilla JS, I don't want to use any other libraries for this :)

you can use data attribute to store temp values in page. take a look on this example using JQuery.
<!-- index.html -->
Order
<script>
$('#order-btn').click(function() {
var maxCounts = this.data('maxCounts');
var count = this.data('count');
if (count >= maxCount) {
alert('you cant order any more');
return;
}
this.data('count',count++);
// other logic .e.g Ajax call
})
</script>
you can do it using vanilla JS also:
<script>
let counter = 0; //global variable
function order_func() {
let every_product= document.querySelectorAll(".all_prods");
for (let each_prod = 0; each_prod < every_product.length; each_prod++) {
every_product[each_prod].addEventListener("click", function (e) {
var count_stuff = e.target.dataset.count; // or this.dataset.count
var max_count = e.target.dataset.maxCounts; // or this.dataset.maxCounts
if(count_stuff < max_count){
add_it(e, each_prod);
e.target.dataset.count = count_stuff++;
}else{
out_of_stock(e);
}
});
}
}
</script>

Delay Display of Text in Qualtrics using Javascript

(This is related to the unanswered question https://stackoverflow.com/questions/26745762/delaying-presentation-of-text-in-qualtrics)
I am working on a Qualtrics survey. I want to delay some text (say, text) being displayed - it should be hidden for 5 seconds, then display.
I found a resource here - Javascript for Qualtrics - that I can't get to work.
Drawing from this example, I try to replicate it by delaying the display of a photo. I do this to see if I can get this working before I go on to delaying the display of text as opposed to a photo.
In the HTML part, I put:
Time: <span id="time1">30</span><br>
<img src="https://upload.wikimedia.org/wikipedia/commons/thumb/1/19/%C3%81guila_calva.jpg/1280px-%C3%81guila_calva.jpg" style="width: 133px; height: 115px;" class='pic1' />
In the Javascript part, I have:
started = false;
function countDown1() {
if (!started)
started = true;
else {
var value1 = parseInt($('time1').innerHTML);
$('time1').innerHTML = value1 - 1;
if (value1 == 26) {
var styling1 = document.getElementsByClassName('pic1')[0];
styling1.style.display = "none";
}
}
setTimeout(countDown1, 1000);
}
Event.observe(window, 'load', countDown1);
For some reason, nothing happens at all with the timer or the photo.
Do I need to wrap the above Javascript in:
Qualtrics.SurveyEngine.addOnload(function()
{
});
I tried this as well, but no change.
So I really have two questions. 1. How do I modify the above code to get it working. And 2. How do I modify the working version of the code to display text after a certain amount of time?

You're making it more complex than need be.
Here is example html for the question:
This is a question. <span id="hiddentext" style="display:none">This text
will display after five seconds.</span>
Here is the javascript for the question:
Qualtrics.SurveyEngine.addOnload(function()
{
setTimeout("$('hiddentext').style.display = 'inline'",5000);
});

This hides the radiobuttons or Choices in a multiple choice question for 2 seconds. If you need to hide the next button as well you can add a Timing question from the ones already provided in Qualtrics and set it to "Enable submit after (seconds)".
Qualtrics.SurveyEngine.addOnload(function() {
var QID = this.questionId;
console.log(QID);
for (var i = 1; i < 4; i++) {
document.getElementById( QID + "-" + i + "-label" ).style.display="none";
}
(function(delay_container){
for (var i = 1 ; i < 4 ; i ++){
document.getElementById(QID + "-" + i + "-label").style.display="block";
}
}).delay(2,this.questionContainer);
});
Let's say you have two sentences that are two separate Descriptive text boxes. And you want the second box to appear some seconds after the first. The following worked for me when assigned for the second box. The same code works for following boxes as well. You can again put a Timing question at the end of the page to hide Next button.
Qualtrics.SurveyEngine.addOnload(function() {
var QID = this.questionId;
console.log(QID);
for (var i = 1; i < 4; i++) {
document.getElementById( QID).style.display="none";
}
(function(delay_container){
for (var i = 1 ; i < 4 ; i ++){
document.getElementById(QID).style.display="block";
}
}).delay(2,this.questionContainer);
});

Reload a content almost invisibly and no blinking effect using JAVASCRIPT

I'm writing a small progam wherein I'm getting data using $.get then display the data so far so good and then there's this part then when I click a certain link it refresh the page but it has this blinking effect. Is there a way on how to reload the content get the new updated content then replace the previously loaded data.
NOTE: I didn't use setInterval or setTimeout function because it slows down the process of my website. any answer that does not include those functions are really appreciated.
Here's the code
function EmployeeIssues(){
$('#initial_left').css({'display' : 'none'});
var table = $('#table_er');
$.get('admin/emp_with_issues', function(result){
var record = $.parseJSON(result);
var data = record.data,
employees = data.employees,
pages = data.pages;
if(employees){
$('#er_tab_label').html('<b>Employees with Issues</b>');
for (var i = 0; i < employees.length; i++) {
$('#table_er').fadeIn('slow');
table.append(write_link(employees[i])); // function that displays the data
}
if(pages){
$('#pagination').html(pages);
}
}else{
$('#er_tab_label').html('<b>No employees with issues yet.</b>');
}
});
table.html('');
}
then this part calls the function and display another updated content
$('#refresh_btn').on('click', function(e){
e.preventDefault();
var tab = $('#tab').val();
if(tab == 'er'){
EmployeeIssues();
}
});
What should I do to display the content without any blinking effect?
thanks :-)

This section might be the issue :
if(employees){
$('#er_tab_label').html('<b>Employees with Issues</b>');
for (var i = 0; i < employees.length; i++) {
$('#table_er').fadeIn('slow');
table.append(write_link(employees[i])); // function that displays the data
}
if(pages){
$('#pagination').html(pages);
}
} else ...
It seems you're asking table_er to fade in once per run of the loop whereas s there can only be one such table, you only need to do it once ?
first try re-arringing it like this:
if(employees){
$('#er_tab_label').html('<b>Employees with Issues</b>');
$('#table_er').hide(); // hide it while we add the html
for (var i = 0; i < employees.length; i++) {
table.append(write_link(employees[i])); // function that displays the data
}
$('#table_er').fadeIn('slow'); // only do this after the table has all its html
if(pages){
$('#pagination').html(pages);
}
} else ....
Another possibility is that you're running through a loop and asking jquery to do stuff while the loop is running. It might be better to work out the whole HTML for the new page data in a string and then get the screen to render it in one line. I cna't do this for you as I don't know what's in write_link etc but something like this ..
if(employees){
$('#er_tab_label').html('<b>Employees with Issues</b>');
var sHTML ="";
$('#table_er').hide(); // hide it while we add the html
for (var i = 0; i < employees.length; i++) {
sHTML+=write_link(employees[i]); // maybe this is right ? if write_link returns an HTML string ?
}
table.append(sHTML); // add the HTML from the string in one go - stops the page rendering while the code is running
$('#table_er').fadeIn('slow'); // now show the table.
if(pages){
$('#pagination').html(pages);
}
} else ...

Accessing a specific control located in the footer template of a column using client side

I need to access a label (lblTotalWeight) that is located in the footer template of a gridtemplatecolumn. From there I want to change the forecolor, though I want to do this all clientside. You can see in my function below that I have already accessed each row successfully, though it seems that doing so for the footer is not as straight forward. My research thus far keeps leading to server side solutions, or in once case a hardcoded row[] cell[] situation.
get_masterTableViewFooter has yet to return anything.
Oh my code behind is in C#.
JavaScript:
function GridCreated(sender, eventArgs) {
grid = $find("<%=rgActivities.ClientID %>");
var masterTable = grid.get_masterTableView();
var rows = masterTable.get_dataItems();
var total = 0.0;
for (var row = 0; row < rows.length; row++) {
var rcb = rows[row].findControl("rcbWeight");
total += parseInt(rcb.get_value());
}
if (total== 100) {
//lblTotalWeight = black;
}
else {
//lblTotalWeight = Red;
}
}
(As a sidenote rcb is RadComboBox.)
Thanks!

You might need to tweak it a bit, but something like this should get you close:
var footerLabelID = '<%= ((GridFooterItem)rgActivities.MasterTableView.GetItems(GridItemType.Footer)[0]).FindControl("lblTotalWeight").ClientID %>';
var footerLabel = document.getElementById(footerLabelID);
if (footerLabel){
footerLabel.innerText = "Hello World!";
}

document.forms[i] code works in the page but gives "undefined" error in Greasemonkey

So there is a page with about 50 forms.
The first form is a search, so I skip that form.
The remaining 49, I care about.
Out of those 49, I am only looking for forms with the go value equal to renew.
I wrote the code in scratch pad and it works fine.
I paste it into Greasemonkey and I get "document.forms[i].go is undefined"
Here is my code:
var i=1 ;
var total = document.forms.length -1;
while (i<=total) {
var go_val = document.forms[i].go.value;
if(go_val == "renew"){
document.forms[i].setAttribute('target','_blank');
}
i++;
}
I have also tried this, to check if the go element exists and the form generates no errors, but does not run setattribute.
var i=0 ;
var total = document.forms.length -1;
while (i<=total) {
if(document.forms[i].go){
var go_val = document.forms[i].go.value;
if(go_val == "renew"){
document.forms[i].setAttribute('target','_blank');
}
}
i++;
}
Why does it work in scratch pad, but not in Greasemonkey?

I have found: "Pitfall #3: Named Forms and Form Elements" and figured it out...
var i=0;
var total = document.forms.length -1;
while (i<=total) {
var form = document.forms[i];
if(form.elements.namedItem("go")){
var input = form.elements.namedItem("go");
var go_val = input.value;
if(go_val == "renew"){
document.forms[i].setAttribute('target','_blank');
}
}
i++;
}