[6a3a178] | 1 | import { urlAlphabet } from './url-alphabet/index.js'
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| 2 | if (process.env.NODE_ENV !== 'production') {
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| 3 | if (
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| 4 | typeof navigator !== 'undefined' &&
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| 5 | navigator.product === 'ReactNative' &&
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| 6 | typeof crypto === 'undefined'
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| 7 | ) {
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| 8 | throw new Error(
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| 9 | 'React Native does not have a built-in secure random generator. ' +
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| 10 | 'If you don’t need unpredictable IDs use `nanoid/non-secure`. ' +
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| 11 | 'For secure IDs, import `react-native-get-random-values` ' +
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| 12 | 'before Nano ID.'
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| 13 | )
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| 14 | }
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| 15 | if (typeof msCrypto !== 'undefined' && typeof crypto === 'undefined') {
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| 16 | throw new Error(
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| 17 | 'Import file with `if (!window.crypto) window.crypto = window.msCrypto`' +
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| 18 | ' before importing Nano ID to fix IE 11 support'
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| 19 | )
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| 20 | }
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| 21 | if (typeof crypto === 'undefined') {
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| 22 | throw new Error(
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| 23 | 'Your browser does not have secure random generator. ' +
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| 24 | 'If you don’t need unpredictable IDs, you can use nanoid/non-secure.'
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| 25 | )
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| 26 | }
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| 27 | }
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| 28 | let random = bytes => crypto.getRandomValues(new Uint8Array(bytes))
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| 29 | let customRandom = (alphabet, size, getRandom) => {
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| 30 | let mask = (2 << (Math.log(alphabet.length - 1) / Math.LN2)) - 1
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| 31 | let step = -~((1.6 * mask * size) / alphabet.length)
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| 32 | return () => {
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| 33 | let id = ''
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| 34 | while (true) {
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| 35 | let bytes = getRandom(step)
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| 36 | let j = step
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| 37 | while (j--) {
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| 38 | id += alphabet[bytes[j] & mask] || ''
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| 39 | if (id.length === size) return id
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| 40 | }
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| 41 | }
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| 42 | }
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| 43 | }
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| 44 | let customAlphabet = (alphabet, size) => customRandom(alphabet, size, random)
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| 45 | let nanoid = (size = 21) => {
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| 46 | let id = ''
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| 47 | let bytes = crypto.getRandomValues(new Uint8Array(size))
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| 48 | while (size--) {
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| 49 | let byte = bytes[size] & 63
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| 50 | if (byte < 36) {
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| 51 | id += byte.toString(36)
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| 52 | } else if (byte < 62) {
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| 53 | id += (byte - 26).toString(36).toUpperCase()
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| 54 | } else if (byte < 63) {
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| 55 | id += '_'
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| 56 | } else {
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| 57 | id += '-'
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| 58 | }
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| 59 | }
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| 60 | return id
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| 61 | }
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| 62 | export { nanoid, customAlphabet, customRandom, urlAlphabet, random }
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