What's the use of HTML Input element that has no value?

Question

Just wondering, why to use an input element with out a value attribute.

is it for some security reasons ? is it included in form submission ? and if so, what value would it have?

EX:

<input type="hidden" id="X" name="x">

Thanks in advance .

The default value it is empty string, it's no difference with `value=""`. — Leo, Dec 03 '14 at 07:06
even if dont have name attribute will be submit it I think so... — ncubica, Dec 03 '14 at 07:13

score 0 · Accepted Answer · answered Dec 03 '14 at 07:04

0

It will show up in the request as an empty variable. You can use this to check whether it is set or not.

answered Dec 03 '14 at 07:04

dan-klasson

you mean it will be included in form submission as (&x=&...) ? – Dr.Vision Dec 03 '14 at 07:06
If the action is set to `GET`, yes. – dan-klasson Dec 03 '14 at 07:08
and if POST, it won't be included? – Dr.Vision Dec 03 '14 at 07:10
It will, just not part of URL. – Leo Dec 03 '14 at 07:13
okay thanks a lot, any idea what's the use of such a thing? security reason? for ex anti spam? – Dr.Vision Dec 03 '14 at 07:15
Because sometimes helps knowing if the value is present or if it is present but it has no value. For example you could apply a security check/verification only if a certain key exists (checksum?) or delete a certain value if the key exists but is is empty. And most of the times `""` is a value too. – SmartDev Dec 03 '14 at 07:32

1 Answers1