Yeah, I know nothing about frontend frameworks (Angular was just getting started last time I did any frontend work), and having read about Svelte for the first

Yeah, I know nothing about frontend frameworks (Angular was just getting started last time I did any frontend work), and having read about Svelte for the first time just now, the "$:" thing seems pretty reasonable to me. <script> let count = 0; $: doubled = count * 2; </script> <p>{count} doubled is {doubled}</p> I'd be very confused if `doubled` were to somehow automatically update any time the value of `count` changes, if merely defined as a standard variable (e.g. `let doubled = count * 2;`). This would totally break my mental programming model. I'm not sure what the parent commenter had in mind as an alternative, or how it could be made simpler or terser.