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 using the variable 'inp'

Answer 1

if ( $("#txt").val().length > 0 )
{
  // do something
}

Your method fails when there is more than 1 space character inside the textbox.

Answer 2

if (inp.val().length > 0) {
    // do something
}

if you want anything more complicated, consider regex or use the validation plugin which takes care of this for you

Answer 3

var inp = $("input:text");

this should give you all textboxes

Answer 4

how do I check if a field has a string value tht contains letters 'abc' containing in it using Jquery ??