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Using same JS function for multiple HTML tables?

I have function which adds and delete rows of a table on click of a button i.e add_row. Now i have multiple tables and for which i want to use the same function on the same page.
So below function is for table1, how do i reuse the same function for table2,table3 .. etc? Each table will have its own add_row button i.e, add_row,add_row1, add_row2 etc..
<script type="text/javascript">
$(document).ready(function() {
var rowIdx = 0;
$('#add_row').on('click', function () {
$.each($("#table1 tr"), function() {
if (parseInt($(this).data("id")) > rowIdx) {
rowIdx = parseInt($(this).data("id"));
console.log(rowIdx)
}
});
rowIdx++;
$('#table1').append(`<tr id="addr${rowIdx}" data-id="${rowIdx}" class="hidden">
<td data-name="id">
<input type="text" name='id${rowIdx}' placeholder='ID' value=""`);
});
$('#table1').on('click', '.remove', function () {
var child = $(this).closest('tr').nextAll();
child.each(function () {
var id = $(this).attr('id');
var idx = $(this).children('.row-index').children('p');
var dig = parseInt(id.substring(4));
idx.html(`Row ${dig - 1}`);
$(this).attr('id', `addr${dig - 1}`);
});
$(this).closest('tr').remove();
rowIdx--;
}
);
});
</script>

You mean this?
Don't add and subtract from rowIndex. It is different per table. Use the actual number of rows in the specific table
$(function() {
$('.add_row').on('click', function() {
const $table = $(this).closest("table");
const $rows = $table.find("tr");
let rowIndex = $rows.length;
$table.append(`<tr id="addr${rowIdx}" data-id="${rowIdx}" class="hidden">
<td data-name="id"><input type="text" name='id${rowIdx}' placeholder='ID' value=""</td></tr>`);
});
$(document).on('click', '.remove', function() {
var child = $(this).closest('tr').nextAll();
child.each(function() {
var id = $(this).attr('id');
var idx = $(this).children('.row-index').children('p');
var dig = parseInt(id.substring(4));
idx.html(`Row ${dig - 1}`);
$(this).attr('id', `addr${dig - 1}`);
});
$(this).closest('tr').remove();
});
});

How to search table with multiple column inputs using jQuery?

Table search functionality for multiple columns using jQuery?
<table>
<tr>
<th><input type="text" id="search" placeholder=" live search"></input></th>
<th><input type="text" id="search" placeholder=" live search"></input></th>
</tr>
<tr><th>Unique ID</th><th>Random ID</th></tr>
<tr><td>214215</td><td>442</td></tr>
<tr><td>1252512</td><td>556</td></tr>
<tr><td>2114</td><td>4666</td></tr>
<tr><td>3245466</td><td>334</td></tr>
<tr><td>24111</td><td>54364</td></tr>
</table>
<br />
<script>
$("#search").on("keyup", function() {
var value = $(this).val();
$("table tr").each(function(index) {
if (index !== 0) {
$row = $(this);
var id = $row.find("td:first").text();
if (id.indexOf(value) !== 0) {
$row.hide();
}
else {
$row.show();
}
}
});
});
</script>
I am trying to implement the search functionality without using jquery plugins..
jsfiddle Link here
http://jsfiddle.net/y9Lxdvps/1/

Use https://api.jquery.com/index/
var inputs = $('table tr:first th input[type=text]');
var trs = $('table tr + tr + tr');
inputs.keyup(function()
{
trs.each(function()
{
var tr = $(this);
var show = inputs.toArray().every(function(input, index)
{
var value = $(input).val();
if (value === '')
{
return true;
}
var number = index + 1;
var td = tr.children('td:nth-child(' + number + ')');
var text = td.text();
return text.indexOf(value) != -1;
});
tr[show ? 'show' : 'hide']();
});
});

Find value in all TD with Highlighting

I have this script for searching in table with Highlighting value from "input". But only for first TD in all TR.
Function remove Highlighting
function removeHighlighting(highlightedElements){
highlightedElements.each(function(){
var element = $(this);
element.replaceWith(element.html());
})
}
Function add Highlighting
function addHighlighting(element, textToHighlight){
var text = element.text();
var highlightedText = '<em>' + textToHighlight + '</em>';
var newText = text.replace(textToHighlight, highlightedText);
element.html(newText);
}
Searching in table but only in first TD in TR
$("#search").on("keyup", function() {
var value = $(this).val();
removeHighlighting($("table tr em"));
$("table tr").each(function(index) {
if (index !== 0) {
$row = $(this);
var $tdElement = $row.find('td:first');
var id = $tdElement.text();
var matchedIndex = id.indexOf(value);
if (matchedIndex != 0) {
$row.hide();
}
else {
addHighlighting($tdElement, value);
$row.show();
}
}
});
});
I don´t know how can I searching in all TD and How can I write e.g. some alert if "matchedIndex == -1" (if not found some value from input)

Try looping in all TDs of TR
$("table tr").each(function(index) {
if (index !== 0) {
row = $(this);
$("td", this).each(function(idx) {
var id = $(this).text(); //or $(this).innerText
var matchedIndex = id.indexOf(value);
if (matchedIndex != 0) {
$row.hide();
}
else {
addHighlighting($tdElement, value);
$row.show();
}
}
}
});

A short way
$("table tr > td em").each(function(){
$( this ).replaceWith( $( this ).text() );
});

Adding a span tag with a highlight class is the way to go like suggested in the comments.
Please find a working demo below and in this jsFiddle.
There is a really useful function to remove all the wrapping of the spans. You can do this with $('span.highlight').contents().unwrap().
For finding the text you can use string.search(searchText) or string.match(searchText). The search method will return -1 if nothing is found and the position of the text if found. And match would return occurences in the searchText.
For testing that it finds the first occurence I have added TestY in the table. The flag matched is responsible for this behavior. If you would remove it, it would highlight both TestY elements.
(function () {
var removeHighlight = function () {
$('span.highlight').contents().unwrap();
};
var wrapContent = function (index, $el, text) {
var $highlight = $('<span class="highlight"/>')
.text(text.substring(0, index));
//console.log(text.substring(0, index));
var normalText = document.createTextNode(text.substring(index, text.length));
//console.log(index, $highlight.text(), normalText);
$el.html($highlight).append(normalText);
};
var highlightTextInTable = function ($tableElements, searchText) {
// highlights if text found (during typing)
var matched = false;
//remove spans
removeHighlight();
$.each($tableElements, function (index, item) {
var $el = $(item);
if ($el.text().search(searchText) != -1 && !matched) {
//console.log("matched", $el, $el.html());
wrapContent(searchText.length, $el, $el.html());
//console.log(searchText, $el.text());
if (searchText == $el.text()) {
// found the entry
//console.log("matched");
matched = true;
}
}
});
};
$(function () {
//load table into object
var $tableRows = $('table tr');
var $tableElements = $tableRows.children();
//console.log($tableRows, $tableElements);
$('#search').on('keyup', function (e) {
var searchText = $(this).val();
if (searchText.length == 0) {
// catches false triggers with empty input (e.g. backspace delete or case lock switch would trigger the function)
removeHighlight(); // remove last remaining highlight
return;
}
highlightTextInTable($tableElements, searchText);
});
});
})();
.highlight {
background-color: #00FFFF;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" id="search" />
<table>
<tr>
<td>TestX</td>
<td>Test1.2</td>
<td>Test1.3</td>
<td>Test1.4</td>
</tr>
<tr>
<td>Test2.1</td>
<td>TestY</td>
<td>Test2.3</td>
<td>Test2.4</td>
</tr>
<tr>
<td>Test3.1</td>
<td>TestY</td>
<td>Test3.3</td>
<td>Test3.4</td>
</tr>
</table>

How to get th when child td is clicked?

I trying to get the <th> content of the clicked <td> item.
here is the fiddle: http://jsfiddle.net/zrccq447/
the thing is, the <th> can have colspan 2 or 3, this is the point where I am stuck. this is my code
$('#table9').on('click', 'td:not(:nth-child(1))', function () {
var td = $(this);
var clicked_pos = td.index();
var x = $('#headerx9 th:nth-child(' + (clicked_pos) + ')').text();
var xy = td.text();
alert(x);
});
i want x to be the <th> of clicked td. the problem is now that if you click on some td that shares the th with other tds, i am getting the wrong th.
appreciate any help

I've updated your JsFiddle with the answer found here: Finding a colSpan Header for one of the cells or td's is Spans
JsFiddle: http://jsfiddle.net/zrccq447/4/
$('#table9').on('click', 'td:not(:nth-child(1))', function () {
var td = $(this);
var clicked_pos = td.index();
var x = $('#headerx9 th:nth-child(' + thLocator[clicked_pos] + ')').text();
var xy = td.text();
alert(x);
});
var thLocator = [], colCount = 1;
$('#table9').find('tr:first th').each(function () {
for (var i = 0; i < this.colSpan; i++) {
thLocator.push(colCount);
}
colCount++;
});

Following on from my comment you need to sum up the colspans (or default 1) for each TH until you get enough to match the column you desire:
http://jsfiddle.net/TrueBlueAussie/zrccq447/5/
$('#table9').on('click', 'td:not(:nth-child(1))', function () {
var td = $(this);
var clicked_pos = td.index();
var cols = 0;
var $table = td.closest('table');
var $ths = $table.find('tr th');
for (var i = 1; i < $ths.length; i++) {
var $th = $ths.eq(i);
cols += ~~$th.attr('colspan') || 1;
if (cols >= clicked_pos) {
var x = $th.text();
alert(x);
break;
}
}
});
I tried to keep it generic, so it finds the appropriate table and headers on the fly.

One approach is to get store a reference to each TH, in order, in an array and call the text from the array based on the location of the td.
var thholder = $('table th'),
th = [];
for(var i = 0; i < thholder.length; i++) {
var thi = $(thholder[i]);
for(var j = 0; j < (thi.attr('colspan') || 1); j++) {
th.push(thi);
}
}
$('#table9').on('click', 'td:not(:nth-child(1))', function () {
var td = $(this);
var clicked_pos = td.index();
alert(th[clicked_pos].text());
});
http://jsfiddle.net/zrccq447/3/
This code is not optimised, but shows the approach:
Loop through all the TH in the table.
If the TH does not have the attribute 'colspan', then set the attribute to a value of 1.
Create a loop for each value of colspan and save a reference to the current TH in the array.
When you click on a TD, get it's clicked position and retrieve the text of the TH at that position in the array and alert it :)

Dynamically calculate and display the sum of all tr element

JsFiddle
I am trying to dynamically calculate and display the sum of all tr element whenever a user enters the value of quantity field in my case.
Can someone fix error in my code.
Jquery code:
$("table input").on('change blur input', function() {
var val = this.value;
$(this).closest('tr').find('td:eq(4)').text(function(){
return (+$.trim($(this).siblings(':eq(3)').text()) * +val)
})
$('table tr td:nth-of-type(5)').each(function() {
sum += parseFloat($(this).text().slice(1));
});
$('.sum').text(sum);
});

you need to declare the sum variable
the parseFloat($(this).text().slice(1)) will return NaN when there is not text
why do you use the slice(1) ? you need to parse the whole text.
So
$("table input").on('change blur input', function () {
var val = this.value;
var sum = 0;
$(this).closest('tr').find('td:eq(4)').text(function () {
return (+$.trim($(this).siblings(':eq(3)').text()) * +val)
});
$('table tr td:nth-of-type(5)').each(function () {
sum += parseFloat($(this).text()) || 0;
});
$('.sum').text(sum);
});
Demo at http://jsfiddle.net/KrN7Z/18/
Better Approach
But you should give some classes to some elements in your HTML and it would simplify everything a lot..
<tr>
<td>someno</td>
<td>
<input type="text" placeholder="Some Name" />
</td>
<td>
<input type="text" class="quantity" placeholder="Quantity" />
</td>
<td class="price">50</td>
<td class="total"></td>
<td>something</td>
</tr>
and
$("table input").on('change blur input', function () {
var row = $(this).closest('tr'),
quantity = +row.find('.quantity').val(),
price = parseFloat(row.find('.price').text());
row.find('.total').text(quantity * price);
var sum = 0;
$('.total').each(function () {
sum += parseFloat($(this).text()) || 0;
});
$('.sum').text(sum);
});
Demo at http://jsfiddle.net/KrN7Z/22/

Try this. You need to declare sum, and you need to handle the NaN case.
var sum = 0;
$('table tr td:nth-of-type(5)').each(function() {
var m = parseFloat($(this).text().slice(1));
if (!isNaN(m)) {
sum += m;
}
});
console.log(sum);

As already noted you need to declare sum, handle NaN cases and update the total value on every input. Try this:
$("table input").on('change blur input', function () {
var val = this.value;
var sum = 0;
$(this).closest('tr').find('td:eq(4)').text(function () {
return (+$.trim($(this).siblings(':eq(3)').text()) * +val);
});
$('table tr td:nth-of-type(5)').each(function () {
var k = parseFloat($(this).text());
sum += isNaN(k)?0:k;
$('.sum').text(sum);
});
});