jquery 'attribute contains' selector with a dynamic value

Question

Let's say that i have a variable questionId which is an integer, and i want to find tr elements that have the fragment ("question_"+questionId) in their id. How can i do this? I thought that i would be able to do it with the jquery 'attribute contains' selector.

Eg, this works, for a non-dynamic value,

$("tr[id*='quiz_question_7674']")

but, i can't work out how to plug the variable value in there. This doesn't work for example:

questionId = 7674;
$("tr[id*='quiz_question_'+questionId]")

Any ideas anyone? Is there a better way than 'attribute contains' to do it? I have the feeling i'm missing something obvious.

thanks, max

EDIT - SOLVED. doh, i am indeed missing something obvious. I keep forgetting that it's just a string, nothing more:

$("tr[id*='quiz_question_"+questionId+"']")

Sagi · Accepted Answer · 2010-03-05 14:58:25Z

15

You have error:

var questionId = 7674;
$("tr[id*='quiz_question_" + questionId + "']");

Notes:

Please use var to declare variables.
questionId is a variable. It is not part of the selector. You should concatenate questionId to the string.

answered Mar 5, 2010 at 14:58

Sagi

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Jerod Venema · Accepted Answer · 2010-03-05 14:58:32Z

4

Yep, you almost had it:

var selector = "tr[id*='quiz_question_" + questionId + "']";
$(selector)

answered Mar 5, 2010 at 14:58

Jerod Venema

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