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26 lines
814 B
26 lines
814 B
import { getRandomBytesAsync } from 'expo-random' |
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import { urlAlphabet } from '../url-alphabet/index.js' |
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let random = getRandomBytesAsync |
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let customAlphabet = (alphabet, defaultSize = 21) => { |
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let mask = (2 << (31 - Math.clz32((alphabet.length - 1) | 1))) - 1 |
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let step = Math.ceil((1.6 * mask * defaultSize) / alphabet.length) |
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let tick = (id, size = defaultSize) => |
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random(step).then(bytes => { |
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let i = step |
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while (i--) { |
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id += alphabet[bytes[i] & mask] || '' |
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if (id.length === size) return id |
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} |
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return tick(id, size) |
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}) |
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return size => tick('', size) |
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} |
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let nanoid = (size = 21) => |
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random(size).then(bytes => { |
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let id = '' |
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while (size--) { |
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id += urlAlphabet[bytes[size] & 63] |
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} |
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return id |
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}) |
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export { nanoid, customAlphabet, random }
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