32 lines
620 B
JavaScript
32 lines
620 B
JavaScript
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/*
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* Random number generator
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*/
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let rng;
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if (window.crypto && crypto.getRandomValues) {
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// WHATWG crypto-based RNG - http://wiki.whatwg.org/wiki/Crypto
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// Moderately fast, high quality
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const _rnds32 = new Uint32Array(1);
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rng = function whatwgRNG() {
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crypto.getRandomValues(_rnds32);
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return _rnds32[0];
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};
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}
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if (!rng) {
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// Math.random()-based (RNG)
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// If no Crypto available, use Math.random().
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rng = function() {
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const r = Math.random() * 0x100000000;
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const _rnds = r >>> 0;
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return _rnds;
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};
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}
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export function randomStr() {
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return rng().toString(36);
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}
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export default rng;
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