Develop Reference

How to add multiple values via prompt to textarea without removing and changing other texts?

I created this fiddle so that you can see the struggle I have.
My HTML
<form action="" method="post" role="form" name="my-form-name">
<button class="html-button">Link me</button>
<textarea name="x" id="post-text" rows="17" required="required"></textarea>
<button type="submit" class="submit-button-form">submit form</button>
</form>
JS:
$(".html-button").on("click", function () {
var urls = prompt("Add a link", "http://");
var setText = $("#post-text").val(urls);
// Adding prompt text into my input field
$("#post-text").val(urls);
});
This code works, but it only works once. Meaning: if I add a hyperlink it works the first time, but when I want to add another link, it doesn't insert it. Instead, it just changes whatever I had put in first + the additonal plain text I am adding to the textarea.
My question: how can I make this link addition independent of what I type in the textarea (plain text) and make sure that I can add more links without it changing the other ones in the textarea?
Fiddle: https://jsfiddle.net/vaxqsztj/1/

You need to append data instead of replacing
$("#post-text").val(urls); <-- here you're replacing data with url only
instead you need to add previous text along with url
var setText = $("#post-text").val(urls);
$("#post-text").val(setText + urls); <-- adding url along with previous value
$(".html-button").on("click", function() {
var urls = prompt("Add a link", "http://");
var setText = $("#post-text").val();
// Adding prompt text into my input field
$("#post-text").val(setText + urls);
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form action="" method="post" role="form" name="my-form-name">
<button class="html-button" type='button'>Link me</button>
<textarea name="x" id="post-text" rows="17" required="required"></textarea>
<button type="submit" class="submit-button-form">submit form</button>
</form>

The issue is you are resetting the value of the textarea in the following line with the current prompt value:
var setText = $("#post-text").val(urls);
You can use jQuery's .append() to insert content in the textarea.
You can remove that and add newline (\n) in each click to appear each link in separate line like the following way:
$(".html-button").on("click", function () {
var urls = prompt("Add a link", "http://");
$("#post-text").append(urls + '\n');
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<button class="html-button">Link me</button>
<textarea name="x" id="post-text" rows="17" required="required"></textarea>

Javascript concat clearing input fields

function js() {
document.getElementById("example").innerHTML = document.getElementById("example").innerHTML+"<input type=\"text\" name=\"name\" />";
}
<div id="example">
<input type="text" name="name[]" />
</div>
<button type="button" onclick="js();">Click</button>
I have a form, which need variable number of input types.
<form action="" method="">
[...]
<div id="mezok">
<div id="input_id">
<input type="text" name="name" />
</div>
</div>
[...]
</form>
I add and remove further inputs (along with their divs!) via an ajax call. Javascript calls a php which generates a new input_id div, and then concatenates to the rest of the div id="mezok". Adding and removing inputs are fine as long as everything is empty. However, when I add a new div when there is something in the input, it clears the rest of the inputs.
document.getElementById("mezok").innerHTML = document.getElementById("mezok").innerHTML+http.responseText;
document.getElementById("mezok").innerHTML += http.responseText;
document.getElementById("mezok").innerHTML.concat(http.responseText);
(The last one is not working at all...)
TL;DR: concat input to input, values of inputs disappear. :'(

Don't use innerHTML. What you are doing is redrawing the entire container contents, deleting existent inputs and creating new inputs each time. My experience says that when you are accessing innerHTML, recheck your code as you are probably doing something weird.
What you have to do is to create inputs individually and append them to the container, without touching the rest of the inputs. Is like appending elements to an array.
This way the code is more self-explanatory, and better, is way more performant:
function js() {
var input = document.createElement("input"); // Create a new input element. Is like "<input>".
input.setAttribute("type", "text"); // Set the 'type' attribute to 'text'. Is like having '<input type="text">'
input.setAttribute("name", "name[]"); // Set the 'name' attribute to 'name[]'. Is like having '<input name="name[]">' but because you already have set the type, now is like having '<input type="text" name="name[]">'
document.getElementById("example").appendChild(input); // Push it to the container
}
<div id="example">
<input type="text" name="name[]" />
</div>
<button type="button" onclick="js();">Click</button>

The code below could be a solution for you. In this way you're not going to overwrite the existing inputs with the associated values while you're adding new inputs.
function js() {
var inputElementToAppend = document.createElement('input');
inputElementToAppend.innerHTML = "<input type=\"text\" name=\"name\" />";
document.getElementById("example").appendChild(inputElementToAppend.firstChild);
}
<div id="example">
<input type="text" name="name[]" />
</div>
<button type="button" onclick="js();">Click</button>
Let me know if this worked for you.

Following working fine for me.
<button onclick="myFunction()">Try it</button>
<p id="demo">ABC</p>
<script>
function myFunction() {
var x = document.getElementById("myP").innerHTML;
document.getElementById("demo").innerHTML += `<input type=\"text\" name=\"name\" />`;
}
<script>
I would recommend to use appendChild and removeChild instead of innerHTML

I need to dynamically update an iframe using an input from a user

I have been searching for the right information for days and weeks now, and I must just be missing it. I have a simple problem, so it would seem. I have an iframe, which loads with a default URL. I also have a text box, and a submit button. What I want to do now, is to let the user input a URL, and then have the URL displayed in the iframe. Please don't suggest I simply do other things, or ask why I want to do this. It is a ongoing learning process.
I have a java-script function that works when I use the "onclick" function. Here is the java-script:
<script>
function setURL(url){
document.getElementById('myframe').src = url;
}
This works with a set url function such as this:
<input type="button" id="mybutton" value="Home Page" onclick="setURL('includes/guests.php')" />
The function works in that kind of scenario just fine. But, I want to instead, replace "onclick="setURL('includes/guests.php')" with the url entered by the user in this line:
<input type="text" name="sendurl" size="100">
I am unsure exactly how to get this to work right. I want the iframe to be loaded with the url the user inputs. If i use a standard submit, and submit the form to itself, the post info for the url can be checked, and i even verified it works.
if($_POST['sendurl'] != null) {
$tisturl = $_POST['sendurl'];
}
echo $tisturl;
echo $tisturl is simply to show me that it is carrying the url over correctly.
My problem is, how do I now dynamically update the iframe to the new url value?

Here is working code for something that will take what is typed by the user into a text box and use that as the src for the iFrame. Check your console to see if there are further errors (like Mixed Content security warnings, etc.).
<script>
function myFunction() {
url = document.getElementById('newURL').value;
url = url.replace(/^http:\/\//, '');
url = url.replace(/^https:\/\//, '');
url = "https://" + url;
document.getElementById('myframe').src = url;
};
</script>
<input type="button" id="mybutton" value="Home Page" onclick="myFunction()" />
<input type="text" id="newURL" />
<iframe id="myframe" src="">
</iframe>
I've updated the script to remove http:// and https://prefixes before prepending https:// to ensure it tries to fetch secure resources.

This will work. It will show the loaded URL of the iframe n the text box and it will load the URL typed in the text box to the iframe using the button in the page or the enter key on your computer.
NOTE: You do not need to have a URL, you can have anything you want, this is just an example.
JavaScript
<script language="JavaScript">
function handleKeyPress(e)
{
var key=e.keyCode || e.which;
if (key==13){
event.preventDefault();
GoToURL();
}
return false;
}
function GoToURL()
{
var URLis;
URLis = document.URLframe.u.value
test1 = document.URLframe.u1.value
test2 = document.URLframe.u2.value
// just add more of these above the more text boxes you want to use for it, or you can just have one.
{
var location= ("http://" + URLis + test1 + "anything_you_want" + test2 + ".com"); // delete or add the name of the text boxes of above.
window.open(location, 'iframefr');
}
}
</script>
Boby HTML
<form name="URLframe" id="URLframe" method="post">
<iframe name="iframefr" id="test" src="https://www.4shared.com/privacy.jsp" onload="loadurl();" width="100%" height="528px"></iframe>
<input type="text" name="u" size="71" value="" placeholder=" URL " id="SeekBox" onkeypress="handleKeyPress(event)">
<br>
<input type="text" name="u1" size="71" value="" placeholder=" U1 " onkeypress="handleKeyPress(event)">
<br>
<input type="text" name="u2" size="71" value="" placeholder=" U2 " onkeypress="handleKeyPress(event)">
<input type="button" id="SeekButton" onclick="GoToURL(this);" value=" go ">
<script type="text/javascript">
function loadurl() {
document.getElementById('SeekBox').value = document.getElementById('test').src;
}
</script>
</form>
NOTE: It is important that the function loadurl() is last in the <form>code and not in the head code as the rest of the javascript.

Populating Textbox on website using javascript

I am working on a project that i would need to populate textbox's inside of BMC Web Remedy with information with JavaScript/HTA File. -- Essentially I just need to Push text into textbox's on the site
I can't seem to figure out how to populate the information onto the page itself though, was wondering if I could get some guidance of if this is possible/how i would go about doing this, or just pointed in the right direction.
Just to clarify as an example on the web site:
http://www.brivers.com/resume/scripts/tutorial-hta-textbox.php
Having data push into the name/address/city field
Something like this only I'm not sure how to push it to the website field itself
**sorry just to clarify the field I am wanting to push this to is external of the application, is there a way to push this to a text field on (literally any) website? for example a username/password textbox on any site
<script language="javascript" type="text/javascript">
function PushData_NSO(){
var userinput = txtPhoneNum.value;
document.getElementById('txtName').value = userinput;
}
</script>
<body>
<p> <input id="txtPhoneNum" type="text" value=""> </p>
<p> <input type="button" onclick="PushData_NSO()"> </p>
</body>

You're trying to do getElementById('txtName') where the html is <input id="txtPhoneNum" />. This will never work because the id isn't the same as the one you're trying to access.
For errors like this, you could use the developer tools (Chrome, IE, Firefox shortcut F12) to see if there are errors in the console.
Furthermore the variable txtPhoneNum isn't defined. If you'd want it to be the input-element you should first do txtPhoneNum = document.getElementById('txtPhoneNum').
I've created a plunker to illustrate.

Get the data from HTML like this,
var userinput = document.getElementById('txtPhoneNum').value;
// do something with userinput
To display data in HTML you should use,
document.getElementById("whateverID").innerHTML = "changed user input";

try this:
<script type="text/javascript">
function PushData_NSO(){
var userinput = document.getElementById('txtPhoneNum').value;
document.getElementById('txtName').value = userinput;
}
</script>
<body>
<p> <input id="txtPhoneNum" type="text" value=""> </p>
<input type="text" id="txtName" value="" />
<input type="button" onclick="PushData_NSO()" value="push "/>
</body>

When you use getElementById('ValueOfID'), the javascript searches all the elements in the html where the id attribute is the same value as "ValueOfID" (in this case).
The .value after getElementById means you are going to do something with that value, in this case you change it to whatever is in the "userinput" variable.
So in your case you need to do:
<script language="javascript" type="text/javascript">
function PushData_NSO(){
var userinput = txtPhoneNum.value;
document.getElementById('txtPhoneNum').value = userinput;
}
</script>

Please try this:
<script language="javascript" type="text/javascript">
function PushData_NSO(){
//First get the value or text, for an instance, just say "sampleText".
var userinput = document.getElementById('txtPhoneNum').value;
//Secondly get the id of the textbox and using that append the value to that textbox.
document.getElementById('txtName').value = userinput;
}
</script>

I think this is what your after
<form>
<input id="txtPhoneNum" type="text" value=""/>
<input type="button" onclick="PushData_NSO()" value="Add Number to Div"/>
</form>
<br/>
<div id="txt">The number will replace this text</div>
<script>
function PushData_NSO(){
var userinput = document.getElementById('txtPhoneNum').value
document.getElementById('txt').innerHTML = userinput;
}
</script>
Here is a JSFIDDLE showing it in action, if you have any questions about this feel free to ask

Grabbing value and appending to textarea with Javascript?

I'm stuck!
I have this simple form:
<p><input type="text" name="hometown" id="hometown" size="22" /></p>
<p><textarea name="comment" id="comment"></textarea></p>
What I need is to append the input value from #hometown to textarea! It mustn't replace text already written there. In the best case, it'd just print at the end of whatever is written on ''submit'' click.
This is how far I've got with my Javascript, but nothing seems to work.
function addtxt(input) {
var hometown = document.getElementById('hometown').value;
var obj=document.getElementById(comment)
var txt=document.createTextNode(lol)
obj.appendChild(txt)
}

Textarea has value property to operate with its contents. Just use += to append text:
document.getElementById("comment").value +=
document.getElementById("hometown").value;

Try this
var oldval=$('#comment').val();
var newval=$('#hometown').val();
S('#comment').val(oldval+' '+newval);

Here's an example for you I've put on JSFiddle, using pure javascript and the onClick listener
http://jsfiddle.net/vyqWx/1/
HTML
<input type="text" name="hometown" id="hometown" size="22" />
<textarea name="comment" id="comment"></textarea>
<input type="submit" onClick="doMagic();">
JS
function doMagic(){
var homeTown = document.getElementById("hometown").value;
document.getElementById("comment").value += homeTown;
}