main
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Last change
on this file since d565449 was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
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Update repo after prototype presentation
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Property mode
set to
100644
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File size:
814 bytes
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| 1 | import { getRandomBytesAsync } from 'expo-random'
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| 2 | import { urlAlphabet } from '../url-alphabet/index.js'
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| 3 | let random = getRandomBytesAsync
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| 4 | let customAlphabet = (alphabet, defaultSize = 21) => {
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| 5 | let mask = (2 << (31 - Math.clz32((alphabet.length - 1) | 1))) - 1
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| 6 | let step = Math.ceil((1.6 * mask * defaultSize) / alphabet.length)
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| 7 | let tick = (id, size = defaultSize) =>
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| 8 | random(step).then(bytes => {
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| 9 | let i = step
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| 10 | while (i--) {
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| 11 | id += alphabet[bytes[i] & mask] || ''
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| 12 | if (id.length === size) return id
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| 13 | }
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| 14 | return tick(id, size)
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| 15 | })
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| 16 | return size => tick('', size)
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| 17 | }
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| 18 | let nanoid = (size = 21) =>
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| 19 | random(size).then(bytes => {
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| 20 | let id = ''
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| 21 | while (size--) {
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| 22 | id += urlAlphabet[bytes[size] & 63]
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| 23 | }
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| 24 | return id
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| 25 | })
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| 26 | export { nanoid, customAlphabet, random }
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