You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
26 lines
759 B
26 lines
759 B
import { getRandomBytesAsync } from 'expo-random' |
|
import { urlAlphabet } from '../url-alphabet/index.js' |
|
let random = getRandomBytesAsync |
|
let customAlphabet = (alphabet, size) => { |
|
let mask = (2 << (31 - Math.clz32((alphabet.length - 1) | 1))) - 1 |
|
let step = Math.ceil((1.6 * mask * size) / alphabet.length) |
|
let tick = id => |
|
random(step).then(bytes => { |
|
let i = step |
|
while (i--) { |
|
id += alphabet[bytes[i] & mask] || '' |
|
if (id.length === size) return id |
|
} |
|
return tick(id) |
|
}) |
|
return () => tick('') |
|
} |
|
let nanoid = (size = 21) => |
|
random(size).then(bytes => { |
|
let id = '' |
|
while (size--) { |
|
id += urlAlphabet[bytes[size] & 63] |
|
} |
|
return id |
|
}) |
|
export { nanoid, customAlphabet, random }
|
|
|