Jens Oliver Meiert

HTML Concepts: “Body-Ok”

Post from May 4, 2021 (↻ May 27, 2021), filed under .

On Twitter, I like to run little polls. They’re often about HTML. These last days I ran one about “body-ok.” I asked, what is that?

When I took the screenshot below, more than 60% thought “body-ok” wouldn’t exist, when others related it to some sort of emphasis of content (as part of the document body), or the fact that you can omit the body tags.

Screenshot: What is “body-ok”?

Figure: What is “body-ok”?

But “body-ok” relates to link type keywords, and denotes what link elements are okay to be used in the document body (as opposed to its head). Here’s what the spec says:

Keywords that are body-ok affect whether link elements are allowed in the body. The body-ok keywords are dns-prefetch, modulepreload, pingback, preconnect, prefetch, preload, prerender, and stylesheet.

The section describing the link element adds:

This [being allowed in the body] means that the element can be used where phrasing content is expected.

That is “body-ok” in HTML.

As for the currently 17 link types that are not body-ok… let’s say that I happen to cover them somewhere, too. This does include chapter 6 of my upcoming booklet, Upgrade Your HTML III. Get notified through Leanpub as soon as it gets released! And, if you like, follow me for more HTML polls on Twitter 📊

Tweet this? (If it changed your life, you delight me with a coffee.)

About Me

Jens Oliver Meiert, on April 29, 2020.

I’m Jens Oliver Meiert, and I’m an engineering manager and author. I’ve worked as a technical lead for Google, I’m close to the W3C and the WHATWG, and I write and review books for O’Reilly. Other than that, I love trying things, sometimes including philosophy, art, and adventure. Here on I share some of my views and experiences.

If you have questions or suggestions about what I write, please leave a comment (if available) or a message.

Read More

Have a look at the most popular posts, possibly including:

Looking for a way to comment? Comments have been disabled, unfortunately.

Cover: The Web Development Glossary.

Perhaps my most comprehensive book: The Web Development Glossary (2020). With explanations and definitions for literally thousands of terms from Web Development and related fields, building on Wikipedia as well as the MDN Web Docs. Available at Apple Books, Kobo, Google Play Books, and Leanpub.

Stay up-to-date? Follow me by feed or on Twitter.

Found a mistake? Email me,

You are here: HomeArchive2021 → HTML Concepts: “Body-Ok”

Last update: May 27, 2021

Professional frontend developers produce valid HTML and CSS.