Develop Reference

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

accessing values from an input filed in html + jquery

here is my fiddle
I am looking at getting the values from an inpt form in html. for example I want to get the value that is entered in the Cat name: input form.
<div id="admin-form">
<form>
Cat name:<input id="admin-cat-name" type="text" name="cat-name" placeholder="10" value="10"><br>
Source: <input id="admin-source" type="text" name="source"><br>
Count: <input id="admin-count" type="text" name="count">
<button id="save-button" type="button">Save</button>
<button id="cancel-button" type="button">Cancel</button>
</form>
</div>
I am thinking along the lines of something like the below:
var form = $('form');
var form2 = $('form #admin-cat-name');
//alert(form)
console.log(form)
console.log(form2) // i think this is an array that has the value that I want?
but I just can't quite get the value from the input form. Can anyone advise how I do this? And if I am going about it the right way?

You are actually looking for .val(). Use the following code:
var form2 = $('form #admin-cat-name').val();
From the docs:
Get the current value of the first element in the set of matched elements or set the value of every matched element.

You can use this $("#admin-cat-name").val()

Trouble with getting right value from html input using jquery

I have this at the end of my PHP file:
<script type="text/javascript>"
$("#id").on("click", "#otherId", function(e)
{
var html = "<input class='id' type='text' size='5' />";
var row = $(this).closest("#addoid").html(html);
row.find("input").focus();
row.find('input').change( function(e)
{
var value = $(this).val();
var fid = $("input#idName").val();
$.ajax({
type: "POST",
url: "page.php",
data: { entryId: fid, val: value }
})
.done(function( msg ) {
alter("data: " + msg);
});
});
</script>
</body>
The html is something like this:
<div id="id">
<div id="otherId">
<input id="idName" type="hidden" value="1234" />
<button type="button" id="otherId">Add</button>
</div>
<div id="otherId">
<input id="idName" type="hidden" value="1235" />
<button type="button" id="otherId">Add</button>
</div>
<div id="otherId">
<input id="idName" type="hidden" value="1236" />
<button type="button" id="otherId">Add</button>
</div>
</div>
I left the earlier jquery code out, but basically, when the Add button is pressed, it is changed to an input field, if the user puts an id into the input field, it will display a link (on blur) or go back to the add button if nothing is entered.
So far it is working, however
var fid = $("input#idName").val();
is taking the next id (instead of 1234, it is posting 1235).
I am new to jquery. I have searched around and tried several different things but I am getting nowhere.
Thanks.
ADDITION
To make this more clear, I have a table that is being populated with a foreach loop (using php) it is pulling records from a database.
looks something like this:
<div id="list">
<table>
<?php foreach ($data as $value):?>
<tr>
<td>
<div class="row">
<button class="add">Add</button>
<input class="hiddenId" type="hidden" name="hiddenName" value="<?php echo $value['id']?>" />
</div>
</td>
</tr>
<?php endforeach?>
</table>
</div>
Like I explained earlier, when the "Add" button is clicked, it turns into an input field.
On change (of the input field), I need the ajax to send a request containing the values of the two input fields.
The problem I am having is I am not able to get the correct value of the hidden input. jquery is grabbing a value from another row, not the correct row.
I can't seem to figure this out and have honestly tried many different ways, including some that would probably be considered unconventional.
Thanks for any help.

Please first rename input ids, since ID has to be unique.

one textbox value in another textbox

I want to get value of one textbox and put the same in another textbox.
my code is :
<input type="text" value="Keyword" id="one" />
<input type="text" value="Search" id="two" />
button
jquery:
var input = $("#one");
$('#btn').click(function(){
alert('dgdhjdgj');
var oneValue = $('#one').val();
alert("one value "+ oneValue);
var twoVal = $('#two').val($(input).attr('value'));
alert('two Val' + twoVal);
});
demo is here.
Issue : when I change the value of textbox #one, it does not change the value of #two.
thanks in advance.

$(input).attr('value') gets the value of the value attribute, which is the initial value, not the current value.
You had it right two lines earlier. Use val().

Try this
HTML
<input type="text" placeholder="Keyword" id="one" />
<input type="text" placeholder="Search" id="two" />
button
Script
$('#btn').click(function() {
var oneValue = $('#one').val();
$('#two').val(oneValue)
})
Fiddle

write textarea and check it. JSFIDDLE
$("#add").click(function(){
var thenVal = $("#textarea_first").val();
$("#textarea_second").val(thenVal);
});

if all that you want to change the text of second textbox, as soon as you change the text of first textbox, just use jQuery's change event.
just try this then:
$('#one').on("change",function(){
$('#two').val($(this).val());
});

input text change onclick button value

Actually i want to create a page switcher, all i need for this is an input with type text where will be entered the number of the page, and i have the second input with type button and onclick value:
<input type="text" value="#number of the page#" />
<input type="button" onclick="_go_page_('cf_pages_form_name1','#number of the page#');" />
I cant figure it out how to take this #number of the page# and put it in onclick dynamically using javascript... please smb help!

<input type="text" id="txtPageNumber" value="2" />
<input type="button" id="btn" value="click" onclick="_go_page_('cf_pages_form_name1','#number of the page#');" />
$(document).ready(function(){
$("#btn").click(function(){
var $val = $("#txtPageNumber").val();
alert($val);
_go_page_('cf_pages_form_name1',$val);
});
});
});

Assuming number is the id of the text field.
You can get the value of the text field like this:
$('#number').val();
And pass that is the onclick event

You can use an ID on the page selector input to get the value.
function goToPage(pageNumber) {
// go to pageNumber
}
<input type="text" id="pageSelector" value="#number of the page#" />
<input type="button" onclick="goToPage($('#pageSelector').val())" />
You've tagged this with jQuery so I'm assuming you're using jQuery.

lets your input type is like this
then in jquery try something like this...
$('#pageNo').keyup(function(){
pageNo = $(this).val()
}
then pass this to your button onclick function

i will answer in "very easy to understand" without jquery:
you have to get the value of the first inputfield. this should your function do. but first the inputfield needs an id(f.g. 'number').
code in function:
var pagenumber = document.getElementById('number').value;
then you have to put the number into the url (document.href).