jQuery to check empty string

Question

var id = "<?php echo $val->id; ?>";

var myRadio = $('input[name=<?php echo "mala".$val->id; ?>]').val();

if (myRadio.val.length > 0){
   $("#anketa").load('http://www.svastara.rs/anketa/anketa_m1_data', 
       { answer: myRadio, id: id });
   }
});

Why this if (myRadio.val.length > 0) returns it looks like false, when i am sure that there is something in the string. If its not a good way, how to check that the string is empty or not?

It shouldn't "look false", it should (probably) throw an error. Why are you trying to take val of val()? — raina77ow
– raina77ow, Commented Oct 24, 2012 at 11:10

VisioN · Accepted Answer · 2012-10-24 11:09:59Z

6

No need in val, since you should already get the value with val() method in the previous line:

if (myRadio.length > 0) { ... }

answered Oct 24, 2012 at 11:09

VisioN

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1 Comment

Daniela Over a year ago

still load the link, when i click on button and do not choose radio button

Man Programmer · Accepted Answer · 2012-10-24 11:11:56Z

0

if(myRadio)
return true;
else
return false;

answered Oct 24, 2012 at 11:11

Man Programmer

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Comments

themazz · Accepted Answer · 2012-10-24 11:13:39Z

0

You don't need to use myRadio.val.length due to myRadio is already the value of that input. So all you need is to check this variable with length.

var id = "<?php echo $val->id; ?>";
var myRadio = $('input[name=<?php echo "mala".$val->id; ?>]').val();
if (myRadio.length > 0){
     $("#anketa").load('http://www.svastara.rs/anketa/anketa_m1_data', { answer: myRadio, id: id });
}

You can have a better explanation at http://www.w3schools.com/jsref/jsref_length_string.asp

Good luck!

answered Oct 24, 2012 at 11:13

themazz

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1 Comment

Daniela Over a year ago

I do not know why but it always give a true

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