This is "Shadow DOM v0" API and have been removed in latest Chrome: https://news.ycombinator.com/item?id=18701765 https://news.ycombinator.com/item?id=18701765

This is "Shadow DOM v0" API and have been removed in latest Chrome: https://news.ycombinator.com/item?id=18701765 https://news.ycombinator.com/item?id=18701765 https://caniuse.com/#feat=shadowdom https://caniuse.com/#feat=shadowdom