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854 B

8 months ago
// This alphabet uses `A-Za-z0-9_-` symbols. The genetic algorithm helped
// optimize the gzip compression for this alphabet.
let urlAlphabet =
'ModuleSymbhasOwnPr-0123456789ABCDEFGHNRVfgctiUvz_KqYTJkLxpZXIjQW'
let customAlphabet = (alphabet, size) => {
return () => {
let id = ''
// A compact alternative for `for (var i = 0; i < step; i++)`.
let i = size
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
while (i--) {
// `| 0` is more compact and faster than `Math.floor()`.
id += urlAlphabet[(Math.random() * 64) | 0]
}
return id
}
module.exports = { nanoid, customAlphabet }