No, you don't need to do anything at build time! (You don't even have to have a build time.) You can just… instantiate a template, remembering where the "holes

No, you don't need to do anything at build time! (You don't even have to have a build time.) You can just… instantiate a template, remembering where the "holes" are, to get precise update functions for every data field that gets inserted into the template. This is what lit-html does, and it's such an obvious approach I'm really surprised that VDOM took off before it. https://lit-element.polymer-project.org https://lit-element.polymer-project.org