What is the syntax for boolean attributes, e.g. a checked checkbox, in HTML?

Question

Sounds like a bit of a silly question, but I am wondering what is the best way of stating that a checkbox is checked/unchecked in HTML.

I have seen many different ex

Answer 1

A quick test reveals that jQuery equates any value set to being checked.

alert( $('input:checked').length );
// Returns 5

Even an empty string and the negative values.