Are framesets even supported in modern browsers? They have been removed from the...

tored · 2024-04-18T20:58:42 1713473922

They are still supported and works perfectly fine still. Remember that browsers supports different DOCTYPEs (HTML5, XML, HTML4 strict and non strict etc) and they are not going away anytime soon, probably thousands and thousands web sites out there that doesn't implement HTML5 and never will.

Frameset is deprecated in HTML5, but your index page can be of the older frameset DOCTYPE and each frame valid HTML5 page with a <!DOCTYPE html> declaration. This is why frames (and iframes) are actually great because you can mix old an new.

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" 
      "http://www.w3.org/TR/html4/frameset.dtd">
    <html>
    <head>
        <title>My page</title>
    </head>
    <frameset cols="100%" rows="10%,*,10%">
        <frame name="header" src="header.html">
        <frameset cols="20%,80%" rows="100%">
            <frame name="sidebar" src="sidebar.html">
            <frame name="main" src="main.html">
        </frameset>
        <frame name="footer" src="footer.html">
    </frameset>
    </html>

e.g main.html

    <!DOCTYPE html>
    <html>
        <head>
            <title>main</title>
        </head>
        <body>
            main
        </body>
    </html>

bazoom42 · 2024-04-19T13:51:57 1713534717

AFAIK no browser use the doctype for anything except for triggering quirks or standard rendering mode in css rendering.

But looking at MDN it seems you are correct, all mainstream browsers still support framsets.