Develop Reference

Display element next to another from different parts of the DOM tree

I have two forms, one larger and one smaller. I would like to display the smaller form next to a specific input of the larger form. It's not valid html to embed one form within another in the DOM, but is there a way to display one form over / inside another form next to a specific input using CSS or JS?
<!-- Main Form -->
<form action="action1" method="post">
Name <input type="text" name="name" value="">
Job Title <input type="text" name="job_title" value="">
Cell Number <input type="tel" name="mobile" value=""> <!-- SMALLER FORM SHOULD DISPLAY NEXT TO CELL # INPUT -->
Favorite Sport <input type="text" name="favorite_sport" value="">
Hobbies <input type="text" name="hobbies" value="">
<input type="submit" value="Save">
</form>
<!-- Smaller form loaded via js -->
<form id="optin_js_loaded_form"></form>
<!-- js -->
<script src="external_js_library.js"></script>
<script>
// js code to load form into #optin_js_loaded_form using external_js_library.js
</script>
NOTES
The forms need to be separate because the smaller form is created via an external js library from a marketing service.
I know I could make the data from the larger form submit via ajax, but I'm hoping I can save some work by just changing where the smaller form displays.
EDIT 2020-02-05 14:40
Found a webpage that suggests some possible solutions, but doesn't give much direction on how to implement them. https://discourse.wicg.io/t/position-an-element-relatively-to-another-element-from-anywhere-in-the-dom/968

You could make use of the form attribute to avoid the nesting of form elements. You move the controls from the main form outside of that form element, and add the form attribute to all of them.
Now you can place the small form at its desired position, without violating the HTML rule that form elements should not be nested.
You would still need to apply some CSS on that small form element, so it does not flow to the left. Something like display: inline-block or similar could be useful.
Here is the suggested HTML part:
<form id="mainform" action="action1" method="post"></form>
<div>
Name <input type="text" name="name" form="mainform" value="">
Job Title <input type="text" name="job_title" form="mainform" value="">
Cell Number <input type="tel" name="mobile" form="mainform" value="">
<!-- Smaller form loaded via js -->
<form id="optin_js_loaded_form">
</form>
Favorite Sport <input type="text" name="favorite_sport" form="mainform" value="">
Hobbies <input type="text" name="hobbies" form="mainform" value="">
<input type="submit" form="mainform" value="Save">
</div>

Validate two forms inside one form element with ParsleyJS

I'm building two forms which will live on a single page on a Kentico website. kentico websites are wrapped in one single form field so I can't create individual form elements for each form on the page. The problem is parsleyJS will only allow you to pass a form to initialise it e.g. $("#form").parsley(); and I need to validate the forms independent of each other. Has anyone had this issue before? Can anyone recommend a workaround.
$("#form").parsley();
input{
display:block;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/parsley.js/2.8.1/parsley.min.js"></script>
<form action="" id="form">
<div class="form1">
<label for="fname">First Name</label>
<input type="text" name="fname" required>
<label for="lname">Last Name</label>
<input type="text" name="lname" required>
<input type="submit" value="submit">
</div>
<div class="form2">
<input type="text" name="anotherInput" required>
<input type="submit" value="submit">
</div>
</form>

You may be able to get the results you want using the group option to validate only part of the fields in your form. This is used in this example of a multi step form.

Initialize the forms independent of one another by using the class selector.
$(".form1").parsley();
$(".form2").parsley();

Move data from on input field to another and submit form

I am trying to get one input field that is higher up the page, move it's content to a form field at the bottom of the page and submit the form.
Please see what I have done here (doesn't work):
$('#move_down').click(function() {
$('#input_1').val($('#input_2').val())
});
<input type="text" id="input_1" value="">
<br>
<button id="move_down">Click Here</button>
<br>
<input type="text" id="input_2" value="">
<script src="//code.jquery.com/jquery-3.2.0.js"></script>
Moving the data is just the first part, I am also trying to get it to take the user down to the main form and submit it - is this possible with jQuery?
Updated the question to fix my silly error of omitting the ID selectors. Just need to figure out how to submit the form now.

You are right; just correct your query selector:
$('#move_down').click(function() {
$('#input_2').val($('#input_1').val())
});
http://jsfiddle.net/82x28ryr/4/

Missing the # prefix for id selector
Works fine doing
$('#move_down').click(function() {
$('#input_2').val($('#input_1').val())
});
<input type="text" id="input_1" value="">
<br>
<button id="move_down">Click Here</button>
<br>
<input type="text" id="input_2" value="">
<script src="//code.jquery.com/jquery-3.2.0.js"></script>
As for "moving down" you have only provided html in demo for 2 inputs. You need to update question with all relevant html in order to implement additional features

How to make an alert when a form item is not answered?

I'm very new to JS. But basically, I'm creating a form. Using JavaScript, how do I take a form so that you must fill in form data?
Thanks!
HTML:
<form>
<p>First Name:</p>
<input type="text" name="firstname" class="form">
<p>Last Name:</p>
<input type="text" name="lastname" class="form">
<p>Email:</p>
<input type="text" name="email" class="form">
<p>Questions / Concerns:</p>
<textarea name="concerns" rows="5" cols="30"></textarea>
<br>
<input type="submit" name="submit" value="Submit">
<input type="reset" name="reset" value="Reset">
</form>

There are multiple ways of solving this particular problem.
The easiest way would be to use the required tag in elements:
<input type="text" name="firstname" class="form" required>
Edit: This may not work in very old browsers.But I don't believe you need to worry about that now.
Use required tag in all of your input elements which you need filling compulsorily.
Once you have your basic problem solved, look at using javascript functions for validation. Ref: https://www.w3schools.com/js/js_validation.asp
Once you know this, you can safely progress to reading on how validation is done on large projects- https://validatejs.org/

use document.getElementByTagName to get the input tag
Use addEventListner with first parameter as blur to detect input leave
Use this.value within if statement to check if empty
Alert something
var element=document.getElementByTagName(input);
element.addEventListner("blur",myFunction);
function myFunction(){
if(this.value==''){
alert ("write something");
}
}

Onclick function not working with CFINPUT validation

I am trying to validate the fields using CFINPUT and then calls a popup window function to do more stuff BEFORE submitting the form but it's not working. The onclick function seems to take precedent over the CFINPUT validation. As soon as I click on the Submit button it's calling the popup window function first without validating the fields. I need it to:
first validate the fields
call the popup function
then submit the form after the popup closes itself
(p.s. I see other similar case on here but there is no answer given)
The code looks like this:
<cfform action="register.cfm" method="post">
<cfinput type="text" name="username" size="50" maxlength="100" required="yes" autofocus="on" validate="noblanks">
<cfinput type="text" name="address" size="50" maxlength="100" required="yes" validate="noblanks">
....
<input type="submit" value=" Send " onclick="popup()">
....
Please help. Thank you.

This is an old blog posting so not sure how accurate things are today but it shows how you can run the CFFORM validation via the _CF_checkTaskForm() function. So it seems like if you change the submitting of the form to a button via <input type="button" value="Send" onclick="popup(this.form)" /> then change the popup function to first validate the form via the _CF_checkTaskForm() and if that passes to proceed with the other JS you are doing.
http://www.neiland.net/blog/article/triggering-cfform-validation-when-using-ajax/
To expand on that, I just looked at a CF8 and CF11 installations and looks like the function in those is _CF_checkCFForm_1 if using that version of CF then something like this should get you in the correct direction:
<script>
popup = function(formreference) {
var check = _CF_checkCFForm_1(formreference);
if (!check) {
//if the rules failed then do not submit the form
return false;
} else {
// Do the popup
}
}
</script>
<cfform action="register.cfm" method="post">
<cfinput type="text" name="username" size="50" maxlength="100" required="yes" autofocus="on" validate="noblanks">
<cfinput type="text" name="address" size="50" maxlength="100" required="yes" validate="noblanks">
<input type="button" value=" Send " onclick="popup(this.form)" />
</cfform>

The cfinput validation you're attempting to do is the client-side equivalent to
<cfif len(trim(string)) gt 0>
(Edit: That is not to imply that you should depend wholly on client side validation. Client-side validation is more of a feature to help your visitors. Server side validation is still important.)
Which I have to say is really weak validation. Anything consisting of at least 1 non-whitespace character will pass the test. People will be able to have usernames like "!" which isn't fanstastic, but that's just some information.
On the jQuery Validate link you provided, they show an example form (along with a link of the same form in action)
<form class="cmxform" id="commentForm" method="get" action="">
<fieldset>
<legend>Please provide your name, email address (won't be published) and a comment</legend>
<p>
<label for="cname">Name (required, at least 2 characters)</label>
<input id="cname" name="name" minlength="2" type="text" required>
</p>
<p>
<label for="cemail">E-Mail (required)</label>
<input id="cemail" type="email" name="email" required>
</p>
<p>
<label for="curl">URL (optional)</label>
<input id="curl" type="url" name="url">
</p>
<p>
<label for="ccomment">Your comment (required)</label>
<textarea id="ccomment" name="comment" required></textarea>
</p>
<p>
<input class="submit" type="submit" value="Submit">
</p>
</fieldset>
</form>
<script>
$("#commentForm").validate();
</script>
This very basic example shows how simple Validate can be to install, and a simple format of
<input name="ele" type="text" required>
is exactly the same level of validation you're attempting. So, to begin with, you can almost copy and paste the code. (Aside from from the different requirements you can make, setting minlength requires a certain number of characters and requires that at least one not be whitespace).
jQuery Validate can get quite extensive but is very easy to basically install and once you become familiar, make custom classes as needed
As a final note, don't disregard the disdain for CFForm elements. It may seem like others are disregarding your question, but that's not the case.
To be honest, they began to be introduced at a different time in the life of the internet, but have always been kind of finicky to work with. Expansion to them, in the opinions of many, have not been done well and have frequently exasperated the flaws.
It's super attractive to be able to say <cfinput...required> but the tags become a nuisance and you don't easily have the fine control over them that you might desire. They're a crutch, and a rusty crutch at that.
You might check out CFUI The Right Way # Github or this hosted version for some great insight and examples.