34 lines
1.0 KiB
JavaScript
34 lines
1.0 KiB
JavaScript
if (process.env.NODE_ENV !== 'production') {
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if (typeof navigator !== 'undefined' && navigator.product === 'ReactNative') {
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throw new Error(
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'React Native does not have a built-in secure random generator. ' +
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'If you don’t need unpredictable IDs, you can use `nanoid/non-secure`. ' +
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'For secure ID install `expo-random` locally and use `nanoid/async`.'
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)
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}
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if (typeof self === 'undefined' || (!self.crypto && !self.msCrypto)) {
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throw new Error(
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'Your browser does not have secure random generator. ' +
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'If you don’t need unpredictable IDs, you can use nanoid/non-secure.'
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)
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}
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}
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var crypto = self.crypto || self.msCrypto
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/*
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* This alphabet uses a-z A-Z 0-9 _- symbols.
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* Symbols order was changed for better gzip compression.
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*/
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var url = 'Uint8ArdomValuesObj012345679BCDEFGHIJKLMNPQRSTWXYZ_cfghkpqvwxyz-'
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module.exports = function (size) {
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size = size || 21
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var id = ''
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var bytes = crypto.getRandomValues(new Uint8Array(size))
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while (size--) {
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id += url[bytes[size] & 63]
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}
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return id
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}
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