Check if textbox has empty value

Question

I have the following code:

var inp = $(\"#txt\");

if(inp.val() != \"\")
// do something

Is there any other way to check for empty textbox

Answer 1

var inp = $("#txt").val();
if(jQuery.trim(inp).length > 0)
{
   //do something
}

Removes white space before checking. If the user entered only spaces then this will still work.