Function escapeIdentifier

packages/compiler/src/output/abstract_emitter.ts:725–742

(input: string, alwaysQuote: boolean = true)

}

export function escapeIdentifier(input: string, alwaysQuote: boolean = true): string | null {
  if (input == null) {
    return null;
  }

  const body = input.replace(SINGLE_QUOTE_ESCAPE_STRING_RE, (...match: string[]) => {
    if (match[0] == '\n') {
      return '\\n';
    } else if (match[0] == '\r') {
      return '\\r';
    } else {
      return `\\${match[0]}`;
    }
  });

  const requiresQuotes = alwaysQuote || !LEGAL_IDENTIFIER_RE.test(body);
  return requiresQuotes ? `'${body}'` : body;
}