A more succinct way to output literal curly braces (for input pattern regexp)

[KieranP]

Just ran into this this scenario. Using HTML input with pattern regexp. Need to validate length of string. Used pattern="\d{4}". Took me a while to work out why it wasn't working, Svelte compiles it to pattern="\d4". The only way to get around this is use the uglier pattern="\d{'{'}4{'}'}" syntax to output literal curly braces.

May I suggest:

1. A LSP warning: "Using curly braces within pattern will not work as expected - you will need to escape them"
2. Svelte provide a nicer way to prevent curlys from being parsed. perhaps regexp style \ beforehand: pattern="\d\{4}"

It's not really a bug per-se, so though it would be best to open thread here, but if you think it would be better as an issue, I'm happy to convert it to one.

[brunnerh]

I would do this instead: pattern={'\\d{4}'}

[Ocean-OS]

You could do pattern={/\d{4}/.source}