I am trying to execute a function for each "tr" child element of my "table" with jquery, but this code does not identify the children. I've used this code for "div" based designs before and it works perfectly if I change the "table" and "tr" tags to "div" but it doesn't run here!
This is simple design:
<table id="tblSearch" border="1px">
<tr>
<td>Hello</td>
</tr>
<tr>
<td>Hey</td>
</tr>
<tr>
<td>Hi</td>
</tr>
<tr>
<td>There!</td>
</tr>
</table>
<table>
<tr align="center">
<input id="btnSearch" type="button" value="Search" />
</tr>
</table>
And this is jquery:
$(function () {
$('#btnSearch').click(function () {
var a = $("#tblSearch").children("tr").each(function(){
alert($(this).text);
});
});
});
jsfiddle:
Note that the alert is run just once! And I have also removed the "tr" for children in my jsfiddle to make the code runnable...
could anyone help me?
The tr elements are not children of table, the are children of tbody (or thead or tfoot). The tbody element is automatically created if you don't specify it. You can figure this out easily for yourself if you inspect the generated DOM.
Long story short, either search for all descendants, with .find
$("#tblSearch").find("tr")
// simpler:
$("#tblSearch tr")
or include tbdoy in your selector:
$("#tblSearch").children("tbody").children("tr")
// simpler:
$("#tblSearch > tbody > tr")
That being said, you also have to add the actual content inside td elements, as noted in the other answers.
If you are new to HTML and tables, read the MDN documentation.
There are 2 problems, an invalid html and the selector is wrong
<table id="tblSearch" border="1px">
<tr>
<td>Hello</td>
</tr>
<tr>
<td>Hey</td>
</tr>
<tr>
<td>Hi</td>
</tr>
<tr>
<td>There!</td>
</tr>
</table>
then
$(function () {
$('#btnSearch').click(function () {
var a = $("#tblSearch").find(">tbody > tr").each(function () {
alert($(this).text());
});
});
});
Demo: Fiddle
Problems were:
tables automatically have tbody elements inserted into the DOM, so you should not reference TR's as children of a TABLE element.
You referenced a non-existant text property instead of the jQuery text() function.
You probably want to reference the tds anyway (and probably only a specific TD in each row), as returning the text of an entire row (TR) seldom makes sense in HTML.
JSFiddle: http://jsfiddle.net/TrueBlueAussie/TdGKj/1/
$(function () {
$('#btnSearch').click(function () {
var a = $("#tblSearch td:first-child").each(function () {
alert($(this).text());
});
});
});
The #tblSearch td:first-child selector basically says: "Find the element with id=tblSearch then search for any td elements that are the first child of their parent. Note I added a second column of dummy TDs cells to the JSFiddle so you could see this in practice.
There any many selectors for choosing specific children, which will vary based on your specific needs, but that just needs a little research of jQuery selectors
You don't need to use children at all. You can just create a selector -
$('#tblSearch tr td')
WORKING DEMO - http://codepen.io/nitishdhar/pen/Aiwgm
First you need to fix your HTML structure, place the child td elements inside each tr -
<table id="tblSearch" border="1px">
<tr>
<td>Hello</td>
</tr>
<tr>
<td>Hey</td>
</tr>
<tr>
<td>Hi</td>
</tr>
<tr>
<td>There!</td>
</tr>
</table>
<div>
<input id="btnSearch" type="button" value="Search"/></td>
</div>
Now you can alert each value using this javascript snippet -
$(function () {
$('#btnSearch').click(function () {
$("#tblSearch tr td").each(function(){
alert($(this).text());
});
});
});
Note - This will alert each value separately as you needed.
First of all fix up your html and add the correct tags around the cell data
Then this should do what you're wanting:
$('table#tblSearch tr').children().each(function(){
alert($(this).text());
});
You have multiple problems in the question you provided:
Your HTML is not valid; Place a td element inside each tr
Call the correct jQuery function. Instead of using children('tr'), which it won't find because there are no tr that are children to the table element (only tbody,thead, etc), you will need to call the find() jQuery function (e.g. find('td')) and from there you will be able to get the text of the cell; however, you may also be able to find tr and get text of the whole row in that case.
Related
I'm using Jquery V1.11.1 in my application. I have a HTML table which looks like this:
<table id="permissions">
<tr>
<td></td>
<th>Administrators</th>
<th>Moderators</th>
</tr>
<tr>
<th class="aco">controllers/users/display</th>
<td class="permission">Allowed</td>
<td class="permission">Denied</td>
</tr>
</table>
When you click on "Allowed" or "Denied" I want to select the TH tag which contains the ACO.
I thought this would do it, but it doesnt. $(this).parent('th').text();
What is the best way to select the TH tag using Jquery in this situation?
Use
$(this).closest('tr').find('th.aco').text();
DEMO
or
$(this).siblings('th.aco').text();
DEMO
Use .siblings() in jquery
$(this).siblings('th.aco').text();
$('.permission').on('click', function(){
$(this).siblings('.aco').text();
})
or if more than one siblings has this class .aco
$('.permission').on('click', function(){
$(this).siblings('th.aco').text();
})
will select the th that is parallel to the clicked td and display it's text. You can perform a different function on selected th instead of .text().
Given,
<table id=ThisTable>
<tbody>
<tr>
<td id="ThisCell">
</td>
</tr>
<tr>
<td id="NotThis">
</td>
</tr>
<tr>
<td id="NorThis">
</td>
</tr>
</tbody>
</table
How can I use JQuery/Javascript to assign the ID of the first table cell in #ThisTable to the variable "Selected"?
The result in this case should look like:
var Selected = "ThisCell";
I need to get the first cell's ID without having any knowledge of what the ID is, probably using the :first selector. In addition, this isn't the only table on the page, so it must be referenced with its ID.
var Selected = $('#ThisTable td:first').attr('id');
This selects the first td element that is a descendant of the element with ID ThisTable, returns its id attribute and assigns it to Selected.
JSFiddle
Just:
$("#ThisTable tbody tr:first td:first").attr("id");
This code gets the first td of your table, then stores its id in a variable Selected.
var Selected = document.querySelector("#ThisTable td").id;
Pure DOM methods, fastest method here, and works on 91.71% of browsers according to Can I use.
$(function () {
console.log($($('#ThisTable').find('td')[0]).attr('id'))
});
http://jsfiddle.net/E9mPw/17/
I am trying to use .on to bind an event only to direct children of an element.
The dom looks like this:
table > tbody > tr+ > td > table > tbody > tr+
So far I have tried:
table.find(">tbody").on("dbclick", ">tr", listenerFunction);
table.on("dbclick", "> tbody > tr", listenerFunction);
None of these works as expected and using table.on("dbclick", "tr", listenerFunction) collides with the nested table causing double triggers and the likes because both tables have this listener.
Any ideas most appreciated.
<table>
<tbody>
<tr><!--Selectable row, adds the row after with sub table --></tr>
<tr>
<td>
<table>
<tbody>
<tr></tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
In your listener function use event.stopPropagation to stop the event bubbling back up to a parent tr.
function listenerFunc(e) {
e.stopPropagation();
// Do your thing...
}
My suggestion would be to either add an id or class to the child table. This would ensure that it doesn't conflict with any other element on the page or any modification that happens in future. Suppose you add a class nested-table to child table. The code will look like this:
$('table.nested-table tr').dblclick(listenerFunc)
As you have indicated that you reference to table, this should work:
table.on('dblclick', 'tr', listenerFunc)
If your first <table> is not nested itself, you can provide a selector that only matches <tr> elements that are not descendants of other <tr> elements:
table.on("dbclick", "tr:not(tr tr)", listenerFunction);
Try
var table = $('#tbl')
table.on("click", "> tbody > tr", listenerFunction);
function listenerFunction(e){
if(!$(this).children().filter($(e.target).closest('td')).length){
return;
}
console.log('direc tr')
}
Demo: Fiddle
It turns out that this is in part me forgetting to prevent event bubbling and in part a bug/missing feature in jquery 1.7.
The same code in two jsfiddles
jQuery 1.7.2
jQuery 1.9.1
In jQuery 1.7.2 passing ">tr" as the selector to .on does not work, I do not know if this is a bug or something that's just not implement in 1.7.2 however the .on method was added in 1.7.
The following code reproduces the error. I've tested this on Chrome running on Mountain Lion and Chrome running on window 7
HMTL:
<table id="outer">
<tbody>
<tr id="outer-row">
<td>Hello</td>
<td>World</td>
</tr>
<tr id="outer-row-1">
<td>
<table id="inner">
<tbody>
<tr id="inner-row">
<td>nested
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
JS:
$(function() {
var handle = function(e) {
console.dir(this.id);
};
$("#outer").children("tbody").on("dblclick", ">tr", handle);
$("#inner").children("tbody").on("dblclick", ">tr", handle);
});
I'm working on a code for a form contained within a table. I'm writing (with jQuery) a function to highlight the parent <td> of each <input> element. That part is simple - the code is just:
$('.myForm input').click(function(){
$(this).parent().addClass('active');
})
The more complicated part is that some text fields are inside of a second table nested within a <td> of the first table. It would look like:
<table>
<tr>
<td> <--cell I want to add the class to
<table>
<tr>
<td><input type='text'></td>
</tr>
</table>
</td>
</tr>
</table>
So my question is this: is there a way to use one jQuery statement to find the highest parent <td> of the <input> element? So in other words, can I combine:
$('.myForm input').click(function(){
$(this).parent().addClass('active');
})
and
$('.myForm input').click(function(){
$(this).parent().parent().addClass('active');
})
into one function?
The best solution is to add a class to the table you actually want to target. This means that you could update the markup in future without necessarily breaking the JS, by doing something like $(this).closest('.targetElement').addClass('active').
If you can't do that, you can use parents('td').last(). This selects all td parent elements and then gets the last one.
$('.myForm input').click(function(){
$(this).parents('td').last().addClass('active');
})
See the jQuery manual:
closest
parents
last
Try doing this:
$('.myForm input').click(function(){
$(this).parents('td').last().addClass('active');
})
I'd suggest trying:
$(this).parents("td").last()
It will find all table cell ancestors of the current element. The last one should contain the highest level table cell element.
you can try:
$(this).parents('td:last');
or
$(this).parents('td').last();
Give your top-level td element a class name:
<table>
<tr>
<td class="topTD"> <--cell I want to add the class to
<table>
<tr>
<td><input type='text'></td>
</tr>
</table>
</td>
</tr>
</table>
$('.myForm input').click(function(){
$(this).closest('td.topTD').addClass('active');
});
Quick&dirty :)
$(this).parents('td')[--$(this).parents('td').length]
I have a table and I am highlighting alternate columns in the table using jquery
$("table.Table22 tr td:nth-child(even)").css("background","blue");
However I have another <table> inside a <tr> as the last row. How can I avoid highlighting columns of tables that are inside <tr> ?
Qualify it with the > descendant selector:
$("table.Table22 > tbody > tr > td:nth-child(even)").css("background","blue");
You need the tbody qualifier too, as browsers automatically insert a tbody whether you have it in your markup or not.
Edit: woops. Thanks Annan.
Edit 2: stressed tbody.
Untested but perhaps: http://docs.jquery.com/Traversing/not#expr
$("table.Table22 tr td:nth-child(even)").not("table.Table22 tr td table").css("background","blue");
Here is some code I used to do nested checkbox highlighting within a table. I needed to be able to do a "check all/uncheck all" but only within at a single level within the nesting; that is, I didn't want child elements getting selected as well.
var parentTable = $(this).parents("table:first");
var exclusions = parentTable.find("table :checkbox.select");
var checkboxes = parentTable.find(":checkbox.select").not(exclusions);
I'd get the first table above the current one I was in, get all the checkboxes below this newly found parent table, then exclude them from the complete list of checkboxes I could find. Basically, I was finding every checkbox, but then excluding any child checkboxes I found.
The same could be adapted in your case; replace the checkbox selection with columns instead.
Why not to use the advantages of html ?
Instead of
<table>
<tr>
<td>
...
</td>
</tr>
</table>
Try
<table>
<tfoot>
<tr>
<td>
...
</td>
</tr>
</tfoot>
<tbody>
<tr>
<td>
...
</td>
</tr>
</tbody>
</table>
You can use the <thead> tag too to manipulate headers.
And now you can call the selector on
$("table.Table22 tbody tr td:nth-child(even)").css("background","blue")
Did you test the following?
$("table.Table22 tr td:nth-child(even):not(:last-child)").css("background","blue")
This page defines a nice function for selecting a column
http://programanddesign.com/js/jquery-select-table-column-or-row/