In JavaScript, everything is 'truthy' or 'falsy', and for numbers 0
means false
, everything else true
. So you could write:
if ($(selector).length)
You don't need that >0
part.
The approach you suggest is not guaranteed to give you the result you're looking for - what if you had a tbody
for example:
<table id="myTable">
<tbody>
<tr>...</tr>
<tr>...</tr>
</tbody>
</table>
You would end up with the following:
<table id="myTable">
<tbody>
<tr>...</tr>
<tr>...</tr>
</tbody>
<tr>...</tr>
</table>
I would therefore recommend this approach instead:
$('#myTable tr:last').after('<tr>...</tr><tr>...</tr>');
You can include anything within the after()
method as long as it's valid HTML, including multiple rows as per the example above.
Update: Revisiting this answer following recent activity with this question. eyelidlessness makes a good comment that there will always be a tbody
in the DOM; this is true, but only if there is at least one row. If you have no rows, there will be no tbody
unless you have specified one yourself.
DaRKoN_ suggests appending to the tbody
rather than adding content after the last tr
. This gets around the issue of having no rows, but still isn't bulletproof as you could theoretically have multiple tbody
elements and the row would get added to each of them.
Weighing everything up, I'm not sure there is a single one-line solution that accounts for every single possible scenario. You will need to make sure the jQuery code tallies with your markup.
I think the safest solution is probably to ensure your table
always includes at least one tbody
in your markup, even if it has no rows. On this basis, you can use the following which will work however many rows you have (and also account for multiple tbody
elements):
$('#myTable > tbody:last-child').append('<tr>...</tr><tr>...</tr>');
Best Answer
In JavaScripts, the events triggered on each HTML Element are propagated to their parents, so, to solve your problem and make any element be capable to handle the custom event without do something wrong like
$('*').bind('custom-event')
is to bind the listener to a common parent for all elements, thebody
orhtml
elements :]So, you only need to bind the event to
body
orhtml
element. Then, when any element, inside the choosen parent element, trigger the custom event, it will be propagated to this parent element.And then, in the event handler, you can access the element that has triggered the event by accessing
target
attribute for the event object:event.target
So, the code should be: