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18 lines
493 B
JavaScript
18 lines
493 B
JavaScript
module.exports = (function (global) {
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var uint32 = 'Uint32Array' in global
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var crypto = global.crypto || global.msCrypto
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var rando = crypto && typeof crypto.getRandomValues === 'function'
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var good = uint32 && rando
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if (!good) return Math.random
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var arr = new Uint32Array(1)
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var max = Math.pow(2, 32)
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function random () {
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crypto.getRandomValues(arr)
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return arr[0] / max
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}
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random.cryptographic = true
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return random
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})(typeof self !== 'undefined' ? self : window)
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