If you do not wish to use any javascript, you can use iframes and the "target" attribute on links and forms: https://developer.mozilla.org/en-US/docs/Web/HTML/

If you do not wish to use any javascript, you can use iframes and the "target" attribute on links and forms: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/a#target https://developer.mozilla.org/en-US/docs/Web/HTML/Element/a#... However the user experience is pretty rough, which is why people typically don't use this feature. If you want a minimal amount of javascript to achieve this, we (the htmx folks) also have fixi: https://github.com/bigskysoftware/fixi https://github.com/bigskysoftware/fixi Finally, we are working on introducing general transclusion into the HTML spec itself with the triptych project: https://github.com/alexpetros/triptych https://github.com/alexpetros/triptych however that is a ways off (if ever)