What is the difference between readonly=“true” & readonly=“readonly”?

Question

What is the difference between:

and:

<         


        

Answer 1

According to HTML standards, the use of

is enough to make the input element readonly. But, XHTML standard says that the usage listed above is invalid due to attribute minimization. You can refer to the links below:

https://www.w3.org/TR/xhtml1/diffs.html#h-4.5

http://www.w3schools.com/tags/att_input_readonly.asp