У вашего броузера проблема в совместимости с HTML5
After creating a simple counter with Phoenix LiveView, we're back with a new tutorial on how to create a todo list with LiveView. We'll also dive into Phoenix PubSub and publishing and subscribing to events across our application.
The Blog Post
https://dennisbeatty.com/2019/04/24/how-to-create-a-todo-list-with-phoenix-liveview.html
My Twitter
https://twitter.com/dnsbty
Please Retweet
https://twitter.com/intent/retweet?tweet_id=1108015820507013120
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https://www.youtube.com/channel/UC9l_1J8y_au9Nlgrfz0rduw?sub_confirmation=1