In choo-devtools@2.0.0 there were some conflicting methods. On https://github.com/choojs/choo-devtools/blob/v2.0.0/index.js#L37 `window.choo.log` was set, which was a getter defined in https://github.com/choojs/choo-devtools/blob/v2.0.0/lib/log.js#L21 This basically broke the whole app.