Function for parsing emoji sequences

emoji.js

//
// https://unicode.org/Public/emoji/13.0/emoji-sequences.txt
export function* emojiList(sequences) {

  const LINES = /^[0-9A-F\.\ ]*;/mg;
  const TRAILER = /\W+;$/;
  const RANGE = /(.*)\.\.(.*)/;

  for (const line of sequences.match(LINES)) {

    const code = line.replace(TRAILER, '');
    const range = code.match(RANGE)

    if (range) {
      let a = parseInt(range[1], 16);
      const b = parseInt(range[2], 16);

      for (; a <= b; a++) yield [a]

    } else {
      yield code.split(' ').map(p => parseInt(p, 16))
    }
  }
}