How to check the table has value using Jquery

Question

I have a table.and I need to check the table has at-least one value.and if the text in the table named Test set some alert

my table structure is

<table id="chk-table">
<tbody>
<tr>
<td>Check 
</td>
</tr>
<tr>
<td>Test
</td>
</tr>
<tr>
<td>Check1
</td>
</tr>
</tbody>
</table>

I tried something tlke

if ($('#chk-table tr').length >0) {
            if ($('#chk-table td:contains("Unknown")')) {
                alert("Test");
            }
        }

but when the table has no value the alert is showing Can anyone help?

By values do you mean text? Because the way you're doing it will alert as long as there's a <tr> tag, even if there's no text within it. You should try if ($("#chk-table tr").text() != "") { — cohenadair
– cohenadair, Commented Jun 6, 2014 at 12:55
A jQuery selector ($('#chk-table td:contains("Unknown")')) always returns a jQuery object; because it returns an object this is a 'truthy' value therefore the if assessment always evaluates to true. — David Thomas
– David Thomas, Commented Jun 6, 2014 at 13:02

Pete · Accepted Answer · 2014-06-06 13:03:59Z

3

You need a .length on the end of your selector if you are testing if it exists:

if ($('#chk-table td:contains("Unknown")').length) {
    alert("Test");
}

answered Jun 6, 2014 at 13:03

Pete

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1 Comment

if the given string match any where it will be matched

cohenadair · Accepted Answer · 2014-06-06 13:08:27Z

1

Try:

if ($('#chk-table tr').text().trim() != "") {
    alert("Test");
}

That should alert if there is any text in any of the table's <tr> tags.

answered Jun 6, 2014 at 13:02

cohenadair

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it would be better if you use $('#chk-table tr').text().trim()