I didn't realize how new that was. Yeah I rely on the newest of the newest features. I check caniuse.com and if at least 3 major browsers supports a feature then I use it freely. Sometimes that means using stuff that doesn't work on older browsers or IE11.

Maybe you're on an older version of Chrome? I can't be bothered to do the research but I recall Object.entries being a (relatively) recent addition.

Object.entries requires Chrome 54, have you upgraded?