How to get dynamic data in html (javascript?)

[musbur at posteo.org]

On Sat, 11 Jan 2020 14:39:38 +0100
Friedrich Rentsch <anthra.norell at bluewin.ch> wrote:

> I'm pretty good at hacking html text. But I have no clue how to get 
> dynamic data like this : "At close: {date} {time}". I would
> appreciate a starting push to narrow my focus, currently awfully
> unfocused. Thanks.

Focus on the str.format() function.