This question already has answers here:
Click event doesn't work on dynamically generated elements [duplicate]
(20 answers)
Closed 2 years ago.
I have a html table like so -
<table class="table" id="myTable">
<thead>
<th>Email</th>
<th>Delete</th>
</thead>
<tbody>
</tbody>
I can dynamically add to the table doing this:
var tbody = $('#myTable').children('tbody');
var table = tbody.length ? tbody : $('#myTable');
table.append("<tr><td>"+user_email+"</td><td><input type='button' value='Del' id ='"+user_id+"'class='btn btn-danger btn-sm'></td></tr>");
But when I try to remove a row doing this:
$('input[type="button"]').click(function(e){
$(this).closest('tr').remove()
})
The row don't remove. How do I resolve this?
You were pretty close, since the TR and the button are dynamically generated,
use the .on() method:
$("#myTable").on("click", "input[type='button']", function(e){
$(this).closest('tr').remove()
});
Sometimes not using jQuery may help you understand what's actually happening. Here's a snippet that may be helpful.
// add the listener to the document (event delegation)
document.addEventListener("click", deleteRow);
// add a first row
addRow(document.querySelector("#myTable"));
function deleteRow(evt) {
// read data-property (data-delete or data-add)
if (evt.target.dataset.delete) {
// retrieve the row to delete
const row2Delete = evt.target.closest("tr");
// remove that from *its parent* (the table)
row2Delete.parentNode.removeChild(row2Delete);
} else if (evt.target.dataset.add) {
addRow(document.querySelector("#myTable"));
}
return true;
}
function addRow(toTable) {
// create a row
const row = document.createElement("tr");
// create 2 cells
const cell1 = document.createElement("td");
const cell2 = cell1.cloneNode(true);
//create a button for the second cell
const bttn = document.createElement("button");
bttn.dataset.delete = "1";
bttn.textContent = "delete";
// fill the first cell with a random e-mailaddress
cell1.appendChild(document.createTextNode(`someUser${
Math.floor(1 + Math.random() * 10000000)}#somewhere.net`));
// append button to cell2
cell2.appendChild(bttn);
// append cells to row
row.appendChild(cell1);
row.appendChild(cell2);
// append row to table
toTable.appendChild(row);
}
<button data-add="1">Add a row</button>
<table class="table" id="myTable">
<thead>
<th>Email</th>
<th>Delete</th>
</thead>
<tbody>
</tbody>
So I am having trouble deleting all of the data in an HTML table with js WITHOUT deleting the header. Here is my HTML:
<html>
<title>Z80 Opcodes</title>
<body>
<input type="text" id = "input" value = "">
<button onClick = "hex()">Hex</button>
<button onClick = "bin()">Bin</button>
<button onClick = "assem()">Assembly</button>
<button onClick = "find()">Find</button>
<table id = "out" style="width:100%">
<thead>
<th align="left">Binary</th>
<th align="left">Hex</th>
<th align="left">Assembly</th>
<th align="left">Description</th>
</thead>
<tbody id="tb">
</tbody>
<script src = "js/script.js">
</script>
</body>
</html>
And here is script.js:
var id = document.getElementById("out");
var ab = "";
var row;
var table = ['0000000000nopno operation', '0000000101ld (bc), **loads ** into BC'];
var bin = ['00000000', '00000001'];
var hex = ['00', '01'];
var assembly = ['nop', 'ld (bc), **'];
var description = ['no operation', 'loads ** into BC'];
l = table.length;
function find() {
row = id.insertRow(0);
for (i=0;i <=l-1;i++) {
ab = table[i];
if (ab.includes(document.getElementById("input").value)) {
row = id.insertRow(-1);
cell1 = row.insertCell(0);
cell2 = row.insertCell(1);
cell3 = row.insertCell(2);
cell4 = row.insertCell(3);
cell1.innerHTML = bin[i];
cell2.innerHTML = hex[i];
cell3.innerHTML = assembly[i];
cell4.innerHTML = description[i];
}
}
}
I have omitted A LOT of array entries because they contained almost the FULL instruction set of thee z80 microprocessor.
What this code does (basically) is it gets an input from the user and if the array table contains that input then it gets the corresponding values from bin, hex, assembly and description and assigns each a column in the table out, then adds a row with the for the data. However, I cannot seem to find a way to delete all of the rows in tbody before another set of values are appended to the table without deleting thead. I have searched around on the web and found several solutions, none of which worked. They either deleted the thead or caused some kind of error (I'll give examples if you ask). I am using Google Chrome version 63.0.3239.132 web browser to run my code.
As you may be able to see I am quite new to js and HTML
Any ideas what I have done wrong?
~Jachdich
First You have to close your <table> tag </table>
This is how you can clear your table.
$('#remove').on('click', ()=>{
$('#tb').empty()
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table id = "out" style="width:100%">
<thead>
<th align="left">Binary</th>
<th align="left">Hex</th>
<th align="left">Assembly</th>
<th align="left">Description</th>
</thead>
<tbody id="tb">
<tr>
<th>01010101</th>
<th>1231:sdf:sdf42</th>
<th>213123</th>
<th>description</th>
</tr>
</tbody>
</table>
<button id="remove">
clear
</button>
Assuming you want to keep the tbody element intact instead of just removing it and all its children at once:
// get a reference to the tbody element
var tb = document.querySelector('#out tbody');
// while tb has children, remove the first one
while (tb.childNodes.length) {
tb.removeChild(tb.childNodes[0]);
}
// tb is now empty
From a semantic perspective, it would make the removal of rows much easier if you added them to the <tbody> element instead of the <thead> element. This way, you could target the rows within the body and remove them whilst preserving your <thead> (sibling node to ):
var body = document.querySelector('tbody');
while (body.firstChild) {
// This will remove all children within tbody which in your case are <tr> elements
body.removeChild(body.firstChild);
}
body.removeChild(rowsWithinBody)
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/tbody#examples
with jQuery you can do it simply in a single line of code.
$("#table_id tbody tr").remove();
it will remove all rows in a table except the header.
I would like to split this entire table into three sub tables using Javascript. Each table should retain it's header information.
I cannot adjust the id's or classes as they are generated by a web application, so I need to make do with what is available.
I've been trying to crack this with Jfiddle for quite awhile and am getting frustrated. I'm pretty new to Javascript, but can't image this would require a lot of code. If anyone knows how to split this apart by row size as well (i.e. Split Table up, but selectively), that would be appreciated as well.
I'm limited to Javascript and Jquery 1.7.
<div id="serviceArray">
<table border="1" class="array vertical-array">
<thead>
<tr>
<th>#</th>
<th>Savings</th>
<th>Expenses</th>
<th>Savings</th>
<th>Expenses</th>
<th>Savings</th>
<th>Expenses</th>
</tr>
</thead>
<tbody>
<tr>
<td>Sum</td>
<td>$180</td>
<td>$500</td>
<td>$300</td>
<td>$700</td>
<td>$600</td>
<td>$1000</td>
</tr>
<tr>
<td>Home</td>
<td>$100</td>
<td>$200</td>
<td>$200</td>
<td>$300</td>
<td>$400</td>
<td>$500</td>
</tr>
<tr>
<td>Work</td>
<td>$80</td>
<td>$300</td>
<td>$100</td>
<td>$400</td>
<td>$200</td>
<td>$500</td>
</tr>
</tbody>
</table>
</div>
Did you mean like this?
var tables = $('#serviceArray table tbody tr').map(function () { //For each row
var $els = $(this).closest('tbody') //go to its parent tbody
.siblings('thead').add( //fetch thead
$(this) //and add itself (tr)
.wrap($('<tbody/>')) //wrapping itself in tbody
.closest('tbody')); //get itself with its tbody wrapper
return $els.clone() //clone the above created steps , i.e thead and tbody with one tr
.wrapAll($('<table/>', { //wrap them all to a new table with
'border': '1', //attributes.
'class': 'array vertical-array'
})
).closest('table'); //get the new table
}).get();
$('#serviceArray table').remove();
$('body').append(tables); //append all to the table.
Demo
Or just simply clone the table and remove all other trs from tbody except this one and add it to DOM (Much Shorter Solution).
var tables = $('#serviceArray table tbody tr').map(function (idx) {
var $table = $(this).closest('table').clone().find('tbody tr:not(:eq(' + idx + '))').remove().end();
return $table;
}).get();
Demo
Each of the methods used has documentation available in web and you can use this to work out something yourself to what you need.
You can use simple Javascript for table creation and it will generate rows according to your returned response from api.
var tableHeader = this.responseJsonData.Table_Headers;
var tableData = this.responseJsonData.Table_Data;
let table = document.querySelector("table");
function generateTableHead(table, data) {
//alert("In Table Head");
let thead = table.createTHead();
let row = thead.insertRow();
for (let key of data) {
let th = document.createElement("th");
let text = document.createTextNode(key);
th.appendChild(text);
row.appendChild(th);
}
}
function generateTable(table, data) {
// alert("In Generate Head");
for (let element of data) {
let row = table.insertRow();
for (key in element) {
let cell = row.insertCell();
let text = document.createTextNode(element[key]);
cell.appendChild(text);
}
}
}
using php to echo json array inline i want js/jquery to populate table according to these data.
HTML table
<table>
<thead>
<tr>
<th>Time</th>
<th data-day='2013-03-15'>15-3</th>
<th data-day='2013-03-16'>16-3</th>
<th data-day='2013-03-17'>17-3</th>
</tr>
</thead>
<tbody>
<tr data-time='09'>
<td>9am</td>
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<script>
var arr=[
{"date":"2013-03-15","id":"4","time_booked":"09:00:00"},
{"date":"2013-03-15","id":"1","time_booked":"09:10:00"},
{"date":"2013-03-17","id":"5","time_booked":"09:30:00"}
];
$.each(arr,function(){
console.log('id:'+this.id+'inside:'+this.date+'|'+this.time_booked);
});
</script>
i want to loop thro arr and according to its date and time_booked write id inside td.
for example first row will go to td with date-day='2013-03-15' and data-time='09'
so how can i do this using javascript ?
im thinking should i include data-day,data-time inside each td in tbody ? or is there a better way to do it ?
current approach:
include data-day inside each tr so html of tbody is
<tr data-time='09'>
<td data-day='2013-03-15'></td>
<td data-day='2013-03-16'></td>
etc..
</tr>
then use js
$.each(arr,function(){
var rday=this.date;
var rtime=this.time_booked;
var sel='tr[data-hr="'+rtime.substr(0,2)+'"]';
var dom=$(sel).find('td[data-day="'+rday+'"]').first();
if(dom.length)dom.append(this.id);
});
but i have a feeling its stupid ! there must be a way to map table using x,y (table head,row head) or there is none ?
I think the jQuery index function is what you're looking for. In the code sample below, I've used it to fetch the colIndex for the date. In this case, it fetches all of the th cells within the table, and uses .index(..) with a selector seeking the required date. This gives the column index of the date you're seeking, and from there it's all pretty straight-forward.
var arr=[
{"date":"2013-03-15","id":"4","time_booked":"0900"},
{"date":"2013-03-15","id":"1","time_booked":"0910"},
{"date":"2013-03-17","id":"5","time_booked":"0930"}
];
$.each(arr,function(){
var cell = GetCellByDateAndTime(this.date, this.time_booked);
$(cell).text(this.id);
});
function GetCellByDateAndTime(date, time) {
var colIndex = $("#BookingsTable th").index($("[data-day='" + date + "']"));
var row = $("#BookingsTable tr[data-time='" + time + "']")
var cell = $(row).children($("td"))[colIndex];
return cell;
}
And a Fiddle.
How can I delete all rows of an HTML table except the <th>'s using Javascript, and without looping through all the rows in the table? I have a very huge table and I don't want to freeze the UI while I'm looping through the rows to delete them
this will remove all the rows:
$("#table_of_items tr").remove();
Keep the <th> row in a <thead> and the other rows in a <tbody> then replace the <tbody> with a new, empty one.
i.e.
var new_tbody = document.createElement('tbody');
populate_with_new_rows(new_tbody);
old_tbody.parentNode.replaceChild(new_tbody, old_tbody)
Very crude, but this also works:
var Table = document.getElementById("mytable");
Table.innerHTML = "";
Points to note, on the Watch out for common mistakes:
If your start index is 0 (or some index from begin), then, the correct code is:
var tableHeaderRowCount = 1;
var table = document.getElementById('WRITE_YOUR_HTML_TABLE_NAME_HERE');
var rowCount = table.rows.length;
for (var i = tableHeaderRowCount; i < rowCount; i++) {
table.deleteRow(tableHeaderRowCount);
}
NOTES
1. the argument for deleteRow is fixed
this is required since as we delete a row, the number of rows decrease.
i.e; by the time i reaches (rows.length - 1), or even before that row is already deleted, so you will have some error/exception (or a silent one).
2. the rowCount is taken before the for loop starts
since as we delete the "table.rows.length" will keep on changing, so again you have some issue, that only odd or even rows only gets deleted.
Hope that helps.
This is an old question, however I recently had a similar issue.
I wrote this code to solve it:
var elmtTable = document.getElementById('TABLE_ID_HERE');
var tableRows = elmtTable.getElementsByTagName('tr');
var rowCount = tableRows.length;
for (var x=rowCount-1; x>0; x--) {
elmtTable.removeChild(tableRows[x]);
}
That will remove all rows, except the first.
Cheers!
If you can declare an ID for tbody you can simply run this function:
var node = document.getElementById("tablebody");
while (node.hasChildNodes()) {
node.removeChild(node.lastChild);
}
Assuming you have just one table so you can reference it with just the type.
If you don't want to delete the headers:
$("tbody").children().remove()
otherwise:
$("table").children().remove()
hope it helps!
I needed to delete all rows except the first and solution posted by #strat but that resulted in uncaught exception (referencing Node in context where it does not exist). The following worked for me.
var myTable = document.getElementById("myTable");
var rowCount = myTable.rows.length;
for (var x=rowCount-1; x>0; x--) {
myTable.deleteRow(x);
}
the give below code works great.
It removes all rows except header row. So this code really t
$("#Your_Table tr>td").remove();
this would work iteration deletetion in HTML table in native
document.querySelectorAll("table tbody tr").forEach(function(e){e.remove()})
Assing some id to tbody tag. i.e. . After this, the following line should retain the table header/footer and remove all the rows.
document.getElementById("yourID").innerHTML="";
And, if you want the entire table (header/rows/footer) to wipe out, then set the id at table level i.e.
How about this:
When the page first loads, do this:
var myTable = document.getElementById("myTable");
myTable.oldHTML=myTable.innerHTML;
Then when you want to clear the table:
myTable.innerHTML=myTable.oldHTML;
The result will be your header row(s) if that's all you started with, the performance is dramatically faster than looping.
If you do not want to remove th and just want to remove the rows inside, this is working perfectly.
var tb = document.getElementById('tableId');
while(tb.rows.length > 1) {
tb.deleteRow(1);
}
Pure javascript, no loops and preserving headers:
function restartTable(){
const tbody = document.getElementById("tblDetail").getElementsByTagName('tbody')[0];
tbody.innerHTML = "";
}
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.1.1/dist/css/bootstrap.min.css" rel="stylesheet"/>
<table id="tblDetail" class="table table-bordered table-hover table-ligth table-sm table-striped">
<thead>
<tr>
<th>Header 1</th>
<th>Header 2</th>
<th>Header 2</th>
<th>Header 2</th>
</tr>
</thead>
<tbody>
<tr>
<td>
a
</td>
<td>
b
</td>
<td>
c
</td>
<td>
d
</td>
</tr>
<tr>
<td>
1
</td>
<td>
2
</td>
<td>
3
</td>
<td>
4
</td>
<tr>
<td>
e
</td>
<td>
f
</td>
<td>
g
</td>
<td>
h
</td>
</tr>
</tr>
</tbody>
</table>
<button type="button" onclick="restartTable()">restart table</button>
If you have far fewer <th> rows than non-<th> rows, you could collect all the <th> rows into a string, remove the entire table, and then write <table>thstring</table> where the table used to be.
EDIT: Where, obviously, "thstring" is the html for all of the rows of <th>s.
This works in IE without even having to declare a var for the table and will delete all rows:
for(var i = 0; i < resultsTable.rows.length;)
{
resultsTable.deleteRow(i);
}
this is a simple code I just wrote to solve this, without removing the header row (first one).
var Tbl = document.getElementById('tblId');
while(Tbl.childNodes.length>2){Tbl.removeChild(Tbl.lastChild);}
Hope it works for you!!.
Assign an id or a class for your tbody.
document.querySelector("#tbodyId").remove();
document.querySelectorAll(".tbodyClass").remove();
You can name your id or class how you want, not necessarily #tbodyId or .tbodyClass.
#lkan's answer worked for me, however to leave the first row, change
from
for (var x=rowCount-1; x>0; x--)
to
for (var x=rowCount-1; x>1; x--)
Full code:
var myTable = document.getElementById("myTable");
var rowCount = myTable.rows.length;
for (var x=rowCount-1; x>1; x--) {
myTable.deleteRow(x);
}
This will remove all of the rows except the <th>:
document.querySelectorAll("td").forEach(function (data) {
data.parentNode.remove();
});
Same thing I faced. So I come up with the solution by which you don't have to Unset the heading of table only remove the data..
<script>
var tablebody =document.getElementById('myTableBody');
tablebody.innerHTML = "";
</script>
<table>
<thead>
</thead>
<tbody id='myTableBody'>
</tbody>
</table>
Try this out will work properly...
Assuming the <table> element is accessible (e.g. by id), you can select the table body child node and then remove each child until no more remain. If you have structured your HTML table properly, namely with table headers in the <thead> element, this will only remove the table rows.
We use lastElementChild to preserve all non-element (namely #text nodes and ) children of the parent (but not their descendants). See this SO answer for a more general example, as well as an analysis of various methods to remove all of an element's children.
const tableEl = document.getElementById('my-table');
const tableBodyEl = tableEl.querySelector('tbody');
// or, directly get the <tbody> element if its id is known
// const tableBodyEl = document.getElementById('table-rows');
while (tableBodyEl.lastElementChild) {
tableBodyEl.removeChild(tableBodyEl.lastElementChild);
}
<table id="my-table">
<thead>
<tr>
<th>Name</th>
<th>Color</th>
</tr>
</thead>
<tbody id="table-rows">
<tr>
<td>Apple</td>
<td>Red</td>
</tr>
<!-- comment child preserved -->
text child preserved
<tr>
<td>Banana</td>
<td>Yellow</td>
</tr>
<tr>
<td>Plum</td>
<td>Purple</td>
</tr>
</tbody>
</table>
Just Clear the table body.
$("#tblbody").html("");
const table = document.querySelector('table');
table.innerHTML === ' ' ? null : table.innerHTML = ' ';
The above code worked fine for me. It checks to see if the table contains any data and then clears everything including the header.