零宽字符

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Shorten URLs using invisible spaces.

[
  "\u200c",
  "\u200d",
  "\udb40\udc61",
  "\udb40\udc62",
  "\udb40\udc63",
  "\udb40\udc64",
  "\udb40\udc65",
  "\udb40\udc66",
  "\udb40\udc67",
  "\udb40\udc68",
  "\udb40\udc69",
  "\udb40\udc6a",
  "\udb40\udc6b",
  "\udb40\udc6c",
  "\udb40\udc6d",
  "\udb40\udc6e",
  "\udb40\udc6f",
  "\udb40\udc70",
  "\udb40\udc71",
  "\udb40\udc72",
  "\udb40\udc73",
  "\udb40\udc74",
  "\udb40\udc75",
  "\udb40\udc76",
  "\udb40\udc77",
  "\udb40\udc78",
  "\udb40\udc79",
  "\udb40\udc7a",
  "\udb40\udc7f",
];

参考资料： Zero Width Space