[jquery] Check if textbox has empty value

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'

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

I had to add in the == to get it to work for me, otherwise it ignored the condition even with empty text input. May help someone.

Use the following to check if text box is empty or have more than 1 white spaces

var name = jQuery.trim($("#ContactUsName").val());

if ((name.length == 0))
{
    Your code 
}
else
{
    Your code
}

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.

The check can be done like this:

if (!!inp.val()) {

}

and even shorter:

if (inp.val()) {

}

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

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

$('input:text').filter(function() { return this.value.length > 0; });

Also You can use

$value = $("#txt").val();

if($value == "")
{
    //Your Code Here
}
else
{
   //Your code
}

Try it. It work.