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- // 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 }
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