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

The W3C spec seems to imply that just the checked attr being there is correct. Does that mean that checked="false" and checked="no" will still check the box though?

Exactly. That's why it's a bad idea to use checked="true" and checked="yes", they imply that checked="false" and checked="no" will not check the box.