Deployed the page to Github Pages.

node_modules/json-parse-even-better-errors/lib/index.js

@@ -0,0 +1,137 @@
+'use strict'
+
+const INDENT = Symbol.for('indent')
+const NEWLINE = Symbol.for('newline')
+
+const DEFAULT_NEWLINE = '\n'
+const DEFAULT_INDENT = '  '
+const BOM = /^\uFEFF/
+
+// only respect indentation if we got a line break, otherwise squash it
+// things other than objects and arrays aren't indented, so ignore those
+// Important: in both of these regexps, the $1 capture group is the newline
+// or undefined, and the $2 capture group is the indent, or undefined.
+const FORMAT = /^\s*[{[]((?:\r?\n)+)([\s\t]*)/
+const EMPTY = /^(?:\{\}|\[\])((?:\r?\n)+)?$/
+
+// Node 20 puts single quotes around the token and a comma after it
+const UNEXPECTED_TOKEN = /^Unexpected token '?(.)'?(,)? /i
+
+const hexify = (char) => {
+  const h = char.charCodeAt(0).toString(16).toUpperCase()
+  return `0x${h.length % 2 ? '0' : ''}${h}`
+}
+
+// Remove byte order marker. This catches EF BB BF (the UTF-8 BOM)
+// because the buffer-to-string conversion in `fs.readFileSync()`
+// translates it to FEFF, the UTF-16 BOM.
+const stripBOM = (txt) => String(txt).replace(BOM, '')
+
+const makeParsedError = (msg, parsing, position = 0) => ({
+  message: `${msg} while parsing ${parsing}`,
+  position,
+})
+
+const parseError = (e, txt, context = 20) => {
+  let msg = e.message
+
+  if (!txt) {
+    return makeParsedError(msg, 'empty string')
+  }
+
+  const badTokenMatch = msg.match(UNEXPECTED_TOKEN)
+  const badIndexMatch = msg.match(/ position\s+(\d+)/i)
+
+  if (badTokenMatch) {
+    msg = msg.replace(
+      UNEXPECTED_TOKEN,
+      `Unexpected token ${JSON.stringify(badTokenMatch[1])} (${hexify(badTokenMatch[1])})$2 `
+    )
+  }
+
+  let errIdx
+  if (badIndexMatch) {
+    errIdx = +badIndexMatch[1]
+  } else /* istanbul ignore next - doesnt happen in Node 22 */ if (
+    msg.match(/^Unexpected end of JSON.*/i)
+  ) {
+    errIdx = txt.length - 1
+  }
+
+  if (errIdx == null) {
+    return makeParsedError(msg, `'${txt.slice(0, context * 2)}'`)
+  }
+
+  const start = errIdx <= context ? 0 : errIdx - context
+  const end = errIdx + context >= txt.length ? txt.length : errIdx + context
+  const slice = `${start ? '...' : ''}${txt.slice(start, end)}${end === txt.length ? '' : '...'}`
+
+  return makeParsedError(
+    msg,
+    `${txt === slice ? '' : 'near '}${JSON.stringify(slice)}`,
+    errIdx
+  )
+}
+
+class JSONParseError extends SyntaxError {
+  constructor (er, txt, context, caller) {
+    const metadata = parseError(er, txt, context)
+    super(metadata.message)
+    Object.assign(this, metadata)
+    this.code = 'EJSONPARSE'
+    this.systemError = er
+    Error.captureStackTrace(this, caller || this.constructor)
+  }
+
+  get name () {
+    return this.constructor.name
+  }
+
+  set name (n) {}
+
+  get [Symbol.toStringTag] () {
+    return this.constructor.name
+  }
+}
+
+const parseJson = (txt, reviver) => {
+  const result = JSON.parse(txt, reviver)
+  if (result && typeof result === 'object') {
+    // get the indentation so that we can save it back nicely
+    // if the file starts with {" then we have an indent of '', ie, none
+    // otherwise, pick the indentation of the next line after the first \n If the
+    // pattern doesn't match, then it means no indentation. JSON.stringify ignores
+    // symbols, so this is reasonably safe. if the string is '{}' or '[]', then
+    // use the default 2-space indent.
+    const match = txt.match(EMPTY) || txt.match(FORMAT) || [null, '', '']
+    result[NEWLINE] = match[1] ?? DEFAULT_NEWLINE
+    result[INDENT] = match[2] ?? DEFAULT_INDENT
+  }
+  return result
+}
+
+const parseJsonError = (raw, reviver, context) => {
+  const txt = stripBOM(raw)
+  try {
+    return parseJson(txt, reviver)
+  } catch (e) {
+    if (typeof raw !== 'string' && !Buffer.isBuffer(raw)) {
+      const msg = Array.isArray(raw) && raw.length === 0 ? 'an empty array' : String(raw)
+      throw Object.assign(
+        new TypeError(`Cannot parse ${msg}`),
+        { code: 'EJSONPARSE', systemError: e }
+      )
+    }
+    throw new JSONParseError(e, txt, context, parseJsonError)
+  }
+}
+
+module.exports = parseJsonError
+parseJsonError.JSONParseError = JSONParseError
+parseJsonError.noExceptions = (raw, reviver) => {
+  try {
+    return parseJson(stripBOM(raw), reviver)
+  } catch {
+    // no exceptions
+  }
+}