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Remove values from input fields when creating a new table row

I'm trying to create a new role but I want a row where there isn't any value in the textfield.
<form action="Fruits" method="Post" enctype="multipart/form-data">
<table id="myTable">
<c:forEach items="${fruits}" var="val" varStatus="count">
<thead>
<tr>
<th>Fruit</th>
<th>Color</th>
</thead>
<tbody>
<td><input type="text" name="name" id="name" value="${val.name}"></td>
<td><input type="text" name="color" id="color" value="${val.color}"></td>
</tbody>
</table>
<button type="button" class="btn btn-default json-editor-btn-add" onclick="myFunction()">Add</button>
</form>
For now whenever I create a new role, it gives me the values of the first row and fill the text field. Is there a way where I just create a row where it doesnt have any values.
function myFunction(){
var table = document.getElementById("myTable");
var first_tr = table.firstElementChild;
var second_tr = first_tr.nextElementSibling;
var tr_clone = first_tr.cloneNode(true);
var tb_clone = second_tr.cloneNode(true);
table.append(tr_clone);
table.append(tb_clone);
}
I'm expecting a blank field text for all of the column upon creating a row

Instead of cloning previous rows create a row template using a template/string literal that you can insert before the end of the tbody element.
Note: you don't have any rows in your current table's - you just have two cells. You also can't have multiple cells with the same id. Ids are supposed to be unique within a document. If you have to identify cells separately you should use a data attribute instead.
const rowTmpl = `<tr>
<td><input type="text" name="name"></td>
<td><input type="text" name="color"></td>
</tr>`;
const tbody = document.querySelector('tbody');
const button = document.querySelector('button');
button.addEventListener('click', handleClick);
function handleClick(e) {
tbody.insertAdjacentHTML('beforeend', rowTmpl);
}
<table>
<thead>
<tr><td>Fruit</td><td>Color</td></tr>
</thead>
<tbody>
<tr>
<td>
<input type="text" value="Apple" name="name"></td>
<td>
<input type="text" value="Red" name="color">
</td>
</tr>
</tbody>
</table>
<button type="button">Add row</button>

Add below lines in your function.
let array_of_input = tb_clone.querySelectorAll('input');
array_of_input.forEach(cur => {
cur.value = '';
})
Your final function looks like this.
function myFunction() {
var table = document.getElementById("myTable");
var first_tr = table.firstElementChild;
var second_tr = first_tr.nextElementSibling;
var tr_clone = first_tr.cloneNode(true);
var tb_clone = second_tr.cloneNode(true);
table.append(tr_clone);
table.append(tb_clone);
let array_of_input = tb_clone.querySelectorAll('input');
array_of_input.forEach(cur => {
cur.value = '';
})
}

How to Create dynamic tbody onclick of button using javascript or jquery

I have this code:
$(document).ready(function() {
//Try to get tbody first with jquery children. works faster!
var tbody = $('#myTable').children('tbody');
//Then if no tbody just select your table
var table = tbody.length ? tbody : $('#myTable');
$('button').click(function() {
//Add row
table.append('<tr>\n\
<td><input name="product_name[]" type="text"/></td>\n\
<td><input name="qty[]" type="text"/></td>\n\
<td><input name="price[]" type="text"/></td>\n\
</tr>');
})
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input name="row_no" type="text" placeholder="Type Your Number of row" />
<button>Add row</button>
<table id="myTable">
<tbody>
<tr>
<th class="column-title">Product name</th>
<th class="column-title">Quantity</th>
<th class="column-title">Price</th>
</tr>
</tbody>
</table>
When I click on the button Add row, it appends a row to the table.
But now, I have a textbox in the HTML. I want to append the table to generate rows based on the value of:
<input name="row_no" type="text" placeholder="Type Your Number of row" />
How do I achieve this?

Here's what you're looking for:
$(document).ready(function() {
//Try to get tbody first with jquery children. works faster!
var tbody = $('#myTable').children('tbody');
//Then if no tbody just select your table
var table = tbody.length ? tbody : $('#myTable');
$('[name=row_no]').text();
$('button').click(function() {
var rows = $('[name=row_no]').val();
// If rows are at maximum 10,
if (!(rows > 10)) {
// then add rows
for (var i = 0; i < rows; i++) {
table.append('<tr>\n\
<td><input name="product_name[]" type="text"/></td>\n\
<td><input name="qty[]" type="text"/></td>\n\
<td><input name="price[]" type="text"/></td>\n\
</tr>');
}
}
else {
alert("Error: Too many rows!\n" +
"Maximum allowed: 10\n" +
"- Inserted: " + rows);
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<body>
<input name="row_no" type="number" placeholder="Type Your Number of row" />
<button>Add row</button>
<table id="myTable">
<tbody>
<tr>
<th class="column-title">Product name</th>
<th class="column-title">Quantity</th>
<th class="column-title">Price</th>
</tr>
</tbody>
</table>
</body>
What changed?
You needed to get the value inserted in the textfield, this can be achieved using, in this case: $('[name=row_no]').val();, so I valorised it as rows variable and then the only thing to add was a cycle that creates as many rows as the user inserts.
I also changed<input name="row_no" type="text" placeholder="Type Your Number of row" />to <input name="row_no" type="number" placeholder="Type Your Number of row" />. This little change allows the user to insert only integers and this is a nice solution to avoid time-loss because of writing a new function to validate values inserted.
Edit:
Added a control on about how many rows the user can insert with if (!(rows > 10)) condition (if you need more or less rows, the only thing to edit is the number)

Clone table and display after button

Great day Community,i'm facing clone whole table problem, if it have solution of clone several row it will be helping a lots.
If using document.getElementsByTagName("table")[2]; it can clone the table and put it in body because i'm using document.body.appendChild(myClone) to do it.
Here is some code:
Solution 1:
function myFunction() {
myTable = document.getElementsByTagName("table")[2]; // doesn't use any table id
myClone = myTable.cloneNode(true);
var y = document.body.appendChild(myClone);
}
Solution 2:
function myFunction() {
var x = document.getElementById("0"); // using this to find auto genereate id for table
test = x.cloneNode(true);
}
Html Display:
<table>
<tr>
<td>
<table id="0">
<tr>
<td><span></span>Name:<input type="text" value="Tom"/> </td>
<td><span> </span>Age:<input type="text" value="25"/> </td>
<td><span> </span>Email:<input type="text" value="tom#gmail.com"/> </td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<table id="1">
<tr>
<td><span></span>Name:<input type="text" value="Alice"/> </td>
<td><span> </span>Age:<input type="text" value="22"/> </td>
<td><span> </span>Email:<input type="text" value="alice#gmail.com"/> </td>
</tr>
</table>
<input type="button" onclick="myFunction()"/>
</td>
</tr>
</table>
Expected result clone the table after the button, the table inside will not have more than 5.
Please help thank you.

Although Dominic Amal Joe F's answer was on the right track, it had some flaws, as well as the structure of the OP table. I think this code would work properly:
function myFunction(){
// get main table body
var tableBody = document.getElementById('mytable').children[0];
// get existing rows
var rows = tableBody.children.length;
// clone the last row (which contains the last table)
var newRow = tableBody.children[rows-1].cloneNode(true);
// get the new row table
var newTable = newRow.children[0].children[0]
// change the table id
newTable.setAttribute('id', rows);
// reset the inputs values
var cells = newTable.children[0].children[0].children;
for (var i=0; i<cells.length; i++) {
cells[i].children[1].value = "";
}
// append the new row to the main table body
tableBody.appendChild(newRow);
}
<table id="mytable">
<tr>
<td>
<table id="0">
<tr>
<td><span>Name:</span><input type="text" value="Tom"/></td>
<td><span>Age:</span><input type="number" value="25"/></td>
<td><span>Email:</span><input type="email" value="tom#gmail.com"/></td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<table id="1">
<tr>
<td><span>Name:</span><input type="text" value="Alice"/></td>
<td><span>Age:</span><input type="number" value="22"/></td>
<td><span>Email:</span><input type="email" value="alice#gmail.com"/></td>
</tr>
</table>
</td>
</tr>
</table>
<button onclick="myFunction()">Clone</button>

I feel the following code will help you.
HTML
<table>
<button onclick="myFunction()">clone</button>
<tr>
<table id="parent-table">
<tr id="parent-row">
<td><span></span>Name:<input type="text" value="Tom"/> </td>
<td><span> </span>Age:<input type="text" value="25"/> </td>
<td><span> </span>Email:<input type="text" value="tom#gmail.com"/></td>
</tr>
</table>
</tr>
</table>
JavaScript
function myFunction(){
let parentTable = document.getElementById("parent-table");
let parentRow = document.getElementsByTagName('tr')
let clone = parentRow[1].cloneNode(true);
parentTable.appendChild(clone)
}

When I use insertrow, does it add row to the table or the tbody tag?

I am using this Script to insert row to HTML table. I use table.insert because I do want to keep the original row in the HTML page, but just want to add further rows.
The table contains a tag <tbody>. I do the insertrow function at the end, which element I should call - table or tbody? In other words, is the code below, for adding rows dynamically, correct?
Script:
var addButton=document.getElementById("add-button");
addButton.addEventListener('click', addRow, false);
function addRow(){
event.preventDefault();
var newData= document.getElementById("inputname").value;
var newLevel = document.getElementById("inputlevel").value;
console.log("new data "+newData);
console.log("new level "+newLevel);
var table = document.getElementById("mytable");
var tableLength = (table.rows.length)-1;
console.log("table lenght: "+tableLength);
var htmltext= "<tr id= 'row"+tableLength+"'> <td id='inputname"+tableLength+"'>"+newData+"</td> \
<td id='inputlevel"+tableLength+"'>"+newLevel+"</td>\
<td><input type='button' id='edit-button"+tableLength+"' value='Edit' class='edit' onclick='editRow("+tableLength+")'> \
<input type='button' id='save-button"+tableLength+"' value='Save' class='save' onclick='saveRow("+tableLength+")'> \
<input type='button' id= 'delete-button"+tableLength+"' value='Delete' class='delete' onclick='deleteRow("+tableLength+")'>\
</td>\
</tr>";
table.insertRow(tableLength).innerHTML=htmltext;
}//end addRow
HTML:
<html>
<head>
<meta charset="UTF-8">
</head>
<body id="body">
<div id="wrapper">
<table align='center' cellspacing=1 cellpadding=1 id="mytable" border=1>
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Action</th>
</tr>
</thead>
<tbody id="tbody">
<tr>
<td><input type="text" id="inputname"></td>
<td>
<select name="levels-list" id="inputlevel">
<option value="High" id="option-1">High</option>
<option value="Mid" id="option-2">Mid</option>
<option value="Low" id="option-3">Low</option>
</select>
</td>
<td><input type="button" class="add" id="add-button" value="Add"></td>
</tr>
</tbody>
</table>
</div>
<!-- <button onclick='display()'> Display</button> -->
<script src="get-text.js"></script>
</body>
</html>

Calling the table is ok. Also you can use createTextNode(text) method before you insert. Check out the snippet and view the docs on MDN (HTMLTableElement.insertRow()) for further reading:
function addRow(tableID, text) {
// Get a reference to the table
var tableRef = document.getElementById(tableID);
// Insert a row in the table
var newRow = tableRef.insertRow();
// Insert a cell in the row
var newCell = newRow.insertCell();
// Append a text node to the cell
var newText = document.createTextNode(text);
newCell.appendChild(newText);
}
// Call addRow(text) with the ID of a table
addRow('TableA', 'Brand new row');
addRow('TableA', 'Another new row');
<table id="TableA" border="1">
<tr>
<td>1. Old top row</td>
</tr>
<tr>
<td>2. second row</td>
</tr>
</table>

How to set value in dynamically added rows form using jquery?

I have a form in php with dynamically added rows (after clicking button the row is added). I want to fill the field with value "xx" and i want to do it in jquery.
This loop create the dynamically added rows in jquery. I want to fill added fields with value "xx":
while($personsArrayLength>2){
echo '
<script>
$(document).ready(function(){
var i = 2;
var rowTemplate2 = jQuery.format($("#template2").html());
rowTemplate2.value = "xx";
addRow2();
function addRow2(){
var ii = i++;
$("#app_here2").append(rowTemplate2(ii));
$("#delete_" + ii).click(function(){
$("#row_" + ii).remove();
});
}
});
</script>
';
Here is html for that:
function addRows2(){
global $personsError_css;
$personsArray = $_POST['persons'];
JB_var_dump($_POST['whichRow']);
$html = '<table id="template2" align="right" style="display:none; ">
<tr id="row_{0}">
<td><input type="text" size="52" id="persons" name="persons[]" maxlength="100"></td>
<td><img src="/../_img/row_del.png" id="delete_{0}" alt="usun"></td>
</tr>
</table>
<table id="list2" style="margin-left:200px;">
<thead >
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td><input type="text" size="52" name="persons[]" maxlength="100" style="'.$personsError_css.';" value="'.$personsArray[1].'"></td>
<td></td>
</tr>
<tr>
<td colspan="2" id="app_here2"></td>
</tr>
</tbody>
</table>';
return $html;
}
This is properly filled form
In this epty fields I want to add values "xx"
Sorry for my english.
How can i set values in added rows? What i should change in my code?
Thanks for help.

Change your 'addRow2' to this:
function addRow2(){
var ii = i++;
$("#app_here2").append(rowTemplate2(ii));
//UPDATE: var rowTemplate2 is not a jQuery Object, as i thought
$("#template2").find("input:empty").val("xx");; // added this row
$("#delete_" + ii).click(function(){
$("#row_" + ii).remove();
});
}