Syntax error

[caesar1shi]

in render.js

function setAttribute(key, attribs, data) {
  let val = attribs[key]
  if (!val) return

  // TODO: check all non-strings here
  if (val.constructor === Object) return

  // attributes must be strings
  if (val === 0 || 1 * val) val = attribs[key] = '' + val

Condition 'val === 0' is always false at this point because the false branch of the condition '!val' at line 59 has been taken

[nobkd]

Probably explains this: #227 (comment)

Probably related: #193

Edit: Those are mostly unrelated. Those from my examples never reach setAttribute. Also, I think they have been fixed with a3b29f5 with processFor (Release happened sometime later, but I probably didn't check again.)