https://christiancourier.com/assets/lib/quotes-f83b85f2.js

1// Straighten / smarten quote characters in a string. Shared by the polished
2// transcript textarea (quotes_controller) and the sermon outline editor, so the
3// two surfaces convert quotes identically.
4
5const CURLY_DOUBLE = /[“”„‟″‶]/g
6const CURLY_SINGLE = /[‘’‚‛′‵]/g
7
8// Curly quotes → straight ASCII. Context-free.
9export function toStraight(text) {
10  return text.replace(CURLY_DOUBLE, '"').replace(CURLY_SINGLE, "'")
11}
12
13// Straight ASCII quotes → curly "smart" quotes. Opening vs closing is decided
14// from the preceding character: start-of-text, whitespace, an opening bracket,
15// or a dash opens; anything else closes (which also yields the apostrophe in
16// contractions/possessives like don't and James'). Pass the character that
17// precedes `text` as `prevChar` so the choice stays correct across chunk
18// boundaries (inline markup, adjacent DOM text nodes).
19export function toSmart(text, prevChar = "") {
20  let out = ""
21  let prev = prevChar
22  for (const ch of text) {
23    if (ch === '"') {
24      out += opensQuote(prev) ? "“" : "”"
25    } else if (ch === "'") {
26      out += opensQuote(prev) ? "‘" : "’"
27    } else {
28      out += ch
29    }
30    prev = ch
31  }
32  return out
33}
34
35function opensQuote(prev) {
36  return prev === "" || /[\s(\[{–—]/.test(prev)
37}