Question

I am trying to assign div id to a variable in jQuery .

 var tbdiv = null;
    tbdiv= $('#mydiv');

But this is throwing error in my jQuery file as ‘ Invalid argument ‘.

I am trying to do the following code which is in javascript

var tbdiv =document.getElementById('mydiv');

Answer 1

You can use attr:

var tbdiv= $('#mydiv').attr('id');
// or: var tbdiv = $('#mydiv')[0].id; 

I would though simply do:

var tbdiv= '#mydiv'

to assign id.

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If you MEANT assigning element itself, this should work fine:

var tbdiv = $('#mydiv');

Or with vanilla JS:

var tbdiv = document.getElementById('mydiv');