Error-message normalization.
to_error_message is the single primitive for coercing an unknown caught
value to a human-readable string — value.message for an Error, otherwise
a caller-supplied fallback or String(value). Used wherever a catch (err)
binding (typed unknown) feeds a diagnostic message, log line, or error
field, replacing the inline err instanceof Error ? err.message : String(err)
idiom.
(value: unknown, fallback?: string | undefined): string import {to_error_message} from 'svelte-docinfo/error.js'; Extract a human-readable message from an unknown thrown value.
valueunknownfallback?string | undefinedstring