sdbbs sdbbs - 1 year ago 114
Javascript Question

Replacing a jQuery selected range of cells?

In the code below, let's call it

, upon load I get rendered a table:


Then, if I click on any of the header cells, a script runs that iterates over the table rows with the jQuery selector "
#mytable > tbody > tr
", and then it uses a chained filter, "
", to select a range of
cells in each row. So, if our columns are indexed
, then
will select
- and the chained
will be applied to 0:
, and so only 0:
will remain, or in terms of original column indexes,
are selected.

To this selection, I want to toggle a class that changes background color, but I would also like to replace the content of the two cells. So I'm trying:

$( "td:gt(0):lt(2)", $thisRow ).toggleClass( "viol" );
$( "td:gt(0):lt(2)", $thisRow ).html("<td>AAAAA</td><td>BBBB</td>");

and the toggling of the class (standalone) works, but the replacement doesn't:


So, instead of replacing the two cells with two other cells - I end up splitting each of the cells, because
gets applied to each element of the collection, and furthermore it changes the inner HTML of the element.

So, assuming in a row iteration loop, I have access to replacement strings like
for a range of cells, how can I replace a range of cells with the content described by this HTML string? To be clear, in the context of this example I'd want the result to be:


The code for

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<!-- <script type="text/javascript" src="../jquery-1.12.3.min.js"></script> -->
<script type="text/javascript" src=""></script>
<style type="text/css">
.a1 {
border-style: solid;
border-width: 1px;
font-size: 1em;
.viol { background-color: #DCE0FF; }
<script type="text/javascript">
function TableHeadListener(inevobj) {
console.log("TableHeadListener", inevobj);
function ToggleTdRangeClass() {
$('#mytable > tbody > tr').each(function() {
$thisRow = $(this);
$( "td:gt(0):lt(2)", $thisRow ).toggleClass( "viol" );
$( "td:gt(0):lt(2)", $thisRow ).html("<td>AAAAA</td><td>BBBB</td>"); // AAA/BBB becomes html of each matched cell individually;!
createTable = function() {
var htmlTblString = '<table border="1" id="mytable">\n\
<th>Row h, cell h1</th>\n\
<th>Row h, cell h2</th>\n\
<th>Row h, cell h3</th>\n\
<th>Row h, cell h4</th>\n\
<th>Row h, cell h5</th>\n\
<td>Row d1, cell d1-1</td>\n\
<td>Row d1, cell d1-2</td>\n\
<td>Row d1, cell d1-3</td>\n\
<td>Row d1, cell d1-4</td>\n\
<td>Row d1, cell d1-5</td>\n\
<td>Row d2, cell d2-1</td>\n\
<td>Row d2, cell d2-2</td>\n\
<td>Row d2, cell d2-3</td>\n\
<td>Row d2, cell d2-4</td>\n\
<td>Row d2, cell d2-5</td>\n\
// add events:
var mtb = $("#mytable");
mtb.find('th').each(function() { $(this).on('click', null, this, TableHeadListener); });

ondocready = function() {

<h1>Hello World!</h1>

<div id="content" class="a1"></div>


Answer Source

One way you can do this is store the values you want on an array[] and then set it to each td element based on the order of the array. Check this:

$('#mytable > tbody > tr').each(function() {
  var txt = ['AAAA','BBBB'],
      count = 0;
  $thisRow = $(this);
  $("td:gt(0):lt(2)", $thisRow).toggleClass("viol");
  $("td:gt(0):lt(2)", $thisRow).each(function(){
.a1 {
  border-style: solid;
  border-width: 1px;
  font-size: 1em;
  height: auto;
.viol {
  background-color: #DCE0FF;
<script src=""></script>
<table border="1" id="mytable">
      <th>Row h, cell h1</th>
      <th>Row h, cell h2</th>
      <th>Row h, cell h3</th>
      <th>Row h, cell h4</th>
      <th>Row h, cell h5</th>
      <td>Row d1, cell d1-1</td>
      <td>Row d1, cell d1-2</td>
      <td>Row d1, cell d1-3</td>
      <td>Row d1, cell d1-4</td>
      <td>Row d1, cell d1-5</td>
      <td>Row d2, cell d2-1</td>
      <td>Row d2, cell d2-2</td>
      <td>Row d2, cell d2-3</td>
      <td>Row d2, cell d2-4</td>
      <td>Row d2, cell d2-5</td>

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