Create dynamic name of newly appended child - javascript

I have the following form inputs in a particular td tag.
<input type="text" value="" name="form_data[1][1][text]"><br>
<input type="text" value="" name="form_data[1][2][text]"><br>
<input type="text" value="" name="form_data[1][3][text]"><br>
Also I have the code for appending new form. But i need to change its name like this form_data[1][4][text] that is array name with next index for text should come.
i.e.
<input type="text" value="" name="form_data[1][4][text]"><br>

Add a class to your input, get the number of elements with this class:
var nbElt = document.getElementsByClassName('yourclass').length;
var newInp = document.createElement('input');
newInp.name = "form_data[1]["+parseInt(nbElt+1)+"][text]";
document.body.appendChild(newImp);
And it's done.

Related

Output Contents of Input in div

I am creating a contact form that creates something like a cart view depending on the inputs.
I managed to get all the checkboxes to output when they are checked; I am having trouble getting the same to work with text and number inputs. So input type text, number and textarea.
<input id="form_name" type="text" name="name" class="form-control"
placeholder="Please enter your firstname *" required="required"
data-error="Pflichtfeld" data-validate="true">
<input type="number" id="age" name="age" min="16" max="99"
class="form-control" required="required"
data-error="Pflichtfeld" data-validate="true">
<div id="descript11" style="display:none;">Vorname:
<b id="vorname"></b>
</div>
<div id="descript12" style="display:none;">Alter:
<b id="alter"></b>
</div>
So I tried the method with $(document).change() but that did not work. I want to grab the contents of the input or textarea and output it to the div with the corresponding id. So "age" should output to "alter" and so on. I'm not sure how to achieve this and w3schools or other sites don't offer an answer.
You can do this by adding an input event listener to your input text boxes. In the example below, I loop through all your input text boxes (as I gave them a class of text-input) using a forEach loop. You can then grab the text from the textbox using this.value and place it into its associated div. To help with this I created a mapping object which is used to map the id of the input to the id of where the text should be placed into.
See example below:
const input_map = {
form_name: "vorname",
age: "alter"
}
document.querySelectorAll(".text-input").forEach(elem => {
elem.addEventListener('input', function() {
const textbox_value = this.value; // get text from input bpx
const target = input_map[this.id]; // get location (ie: the id) of where the text should be placed
document.getElementById(target).innerText = textbox_value; // place the text in that location
});
});
<input id="form_name" type="text" name="name" class="form-control text-input" placeholder="Please enter your firstname *" required="required" data-error="Pflichtfeld" data-validate="true">
<input type="number" id="age" name="age" min="16" max="99" class="form-control text-input" required="required" data-error="Pflichtfeld" data-validate="true">
<div id="descript11">Vorname:<b id="vorname"></b></div>
<div id="descript12">Alter: <b id="alter"></b></div>
Note: In the example above I removed the style="display: none;" from your divs so that you can see the output
You can do it like this:
$('input').on('input',function(){
let text = $(this).val();
let id = $(this).attr('id');
$('div.'+id).text(text)
});
This snippet checks changes on inputs and sets their value to the div with class that matches each input's id .

Javascript capture form text field onChange to hidden field

I have a form with a simple text field for a person's full name.
After a user enters their name and moves/tabs to the next field, I want to be able to capture the full name, extract only the first name, and attach to a separate hidden form field.
If the user goes back and corrects their full name, the extraction should repeat to get the correct first name. The full name text field would still be passed along during form submittal.
I'm thinking plain JS would be the best approach (I'm not using JQuery).
<form>
<input type="text" name="fullname" value="">
<input type="hidden" name="firstname" value="">
</form>
you can try this
this is your html
<form>
<input type="text" name="fullname" value="" id="fullname">
<input type="hidden" name="firstname" value="" id="firstname">
</form>
this is your javascript
<script>
let fullName = document.getElementById("fullname");
let firstName = document.getElementById("firstname");
fullName.addEventListener("blur", function() {
let names = fullName.value.split(" ");
if (names.length > 0) {
firstName.value = names[0];
}
});
</script>
https://jsfiddle.net/3k8kur9u/

Get value from muti dimensional-array textbox using javascript

I have a list of textbox which is dynamically generated and and named with multi-dimensional array for posting to php later.
<input type="text" name="node['A11']['in']">
<input type="text" name="node['A11']['out']">
<input type="text" name="node['X22']['in']">
<input type="text" name="node['X22']['out']">
<input type="text" name="node['C66']['in']">
<input type="text" name="node['C66']['out']">
However, before the values get posted, i am trying to get the value of the specific textbox and do the validation.
var nodeValue = document.getElementsByName("node['X22']['in']").value;
alert(nodeValue);
Tried the above but it is not working. May i know is there a good way to parse trough the textbox list and get the specific textbox's value, let's say for 'X22' -> 'in'?
getElementsByName returns not a single element, but array-like object. Access the [0] indexed element of the result.
If you have unique elements, it will be better to get them by id (getElementById) which returns a single element.
var nodeValue = document.getElementsByName("node['X22']['in']")[0].value
// ----^^^----
alert(nodeValue);
<input type="text" name="node['A11']['in']">
<input type="text" name="node['A11']['out']">
<input type="text" name="node['X22']['in']" value='SomeValue'>
<input type="text" name="node['X22']['out']">
<input type="text" name="node['C66']['in']">
<input type="text" name="node['C66']['out']">
you need a value to get one
<html>
<head></head>
<body>
<input type="text" name="node['A11']['in']">
<input type="text" name="node['A11']['out']">
<input type="text" name="node['X22']['in']">
<input type="text" name="node['X22']['out']">
<input type="text" name="node['C66']['in']">
<input type="text" name="node['C66']['out']">
</body>
<script>
parse = function(){
var nodeValue = document.getElementsByName("node['X22']['in']");
console.log(nodeValue[0]);//to demonstrate that a nodelist is indeed returned.
}
parse()
</script>
</html>
You could use the id attribute and give it an identifier.
var nodeValue = document.getElementById("X22in").value;
console.log(nodeValue);
<input type="text" id="X22in" name="node['X22']['in']" value="foo">
<!-- ^^^^^^^^^^ -->

Finding last entered input

<div class="input-group">
<input type="password" maxlength="1" value="1" readonly="">
<input type="password" maxlength="1" value="2" readonly="">
<input type="password" maxlength="1" value="3" readonly="">
<input type="password" maxlength="1" value="" readonly="">
</div>
I'm trying to get the last entered input:
document.querySelector('.input-pin input[value!=""]:last-child')
... so last-child of input with value not empty, but its an invalid selector.
If you want to base the selection on the attribute value, then you could use the :not() pseudo class to negate the input element with an empty value.
In this case the selector would be:
input[value]:not([value=""])
From there, you can select all the matching elements and retrieve the last one:
var inputs = document.querySelectorAll('input[value]:not([value=""])');
var lastInputWithValue = inputs[inputs.length - 1];
...or:
var inputs = document.querySelectorAll('input[value]:not([value=""])');
var lastInputWithValue = Array.from(inputs).pop();
If the value can change and you want to check based on current property value (rather than the attribute value), then you would need to filter the elements:
var inputs = document.querySelectorAll('input');
var lastInputWithValue = Array.from(inputs).filter(i => i.value).pop();
As a side note, the :last-child pseudo class will only return the last child element inside of the parent element based on their order. It will not filter the selected elements and select the last one by their attribute or class as you are expecting. Also, [value!=""] is not a valid attribute selector as you pointed out. However, you can use input[value]:not([value=""]) like I pointed out above.
You could simply do document.querySelector('.input-group input:last-child');

Replicating the values to another textbox

I have a question regarding JSP. I have two textboxes. When I type the value in the first text box, it should replicate automatically in the second text box.
<input type="text"
class="formtext"
name="List.lItemList<c:out value='[${status.index}]'/>.value1"
value="0.0"
onChange="validateOnChange(this,'desc','minvalue','maxValue','float')">
<input type="text"
class="formtext"
name="List.clItemList<c:out value='[${status.index}]'/>.value2"
value="0.0"
onChange="validateOnChange(this,'desc','minvalue','maxvalue','float')">
Assuming that the first box has ID input1 and the second input2 (so you'll have to add those IDs), you can do it like this:
document.getElementById('input1').onkeyup = function () {
document.getElementById('input2').value = this.value;
};
You can do this using JavaScript. Attach an keyup event handler on the first textbox which should copy its value to the second one.
<input type="text" id="t1" onkeyup="document.getElementById('t2').value=this.value" />
<input type="text" id="t2" />

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