| // This alphabet uses `A-Za-z0-9_-` symbols. | |
| // The order of characters is optimized for better gzip and brotli compression. | |
| // References to the same file (works both for gzip and brotli): | |
| // `'use`, `andom`, and `rict'` | |
| // References to the brotli default dictionary: | |
| // `-26T`, `1983`, `40px`, `75px`, `bush`, `jack`, `mind`, `very`, and `wolf` | |
| let urlAlphabet = | |
| 'useandom-26T198340PX75pxJACKVERYMINDBUSHWOLF_GQZbfghjklqvwyzrict' | |
| let customAlphabet = (alphabet, defaultSize = 21) => { | |
| return (size = defaultSize) => { | |
| let id = '' | |
| // A compact alternative for `for (var i = 0; i < step; i++)`. | |
| let i = size | 0 | |
| while (i--) { | |
| // `| 0` is more compact and faster than `Math.floor()`. | |
| id += alphabet[(Math.random() * alphabet.length) | 0] | |
| } | |
| return id | |
| } | |
| } | |
| let nanoid = (size = 21) => { | |
| let id = '' | |
| // A compact alternative for `for (var i = 0; i < step; i++)`. | |
| let i = size | 0 | |
| while (i--) { | |
| // `| 0` is more compact and faster than `Math.floor()`. | |
| id += urlAlphabet[(Math.random() * 64) | 0] | |
| } | |
| return id | |
| } | |
| module.exports = { nanoid, customAlphabet } | |