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on this file since fa375fe was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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[6a3a178] | 1 | // Unique ID creation requires a high quality random # generator. In the browser we therefore
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| 2 | // require the crypto API and do not support built-in fallback to lower quality random number
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| 3 | // generators (like Math.random()).
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| 4 | var getRandomValues;
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| 5 | var rnds8 = new Uint8Array(16);
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| 6 | export default function rng() {
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| 7 | // lazy load so that environments that need to polyfill have a chance to do so
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| 8 | if (!getRandomValues) {
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| 9 | // getRandomValues needs to be invoked in a context where "this" is a Crypto implementation. Also,
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| 10 | // find the complete implementation of crypto (msCrypto) on IE11.
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| 11 | getRandomValues = typeof crypto !== 'undefined' && crypto.getRandomValues && crypto.getRandomValues.bind(crypto) || typeof msCrypto !== 'undefined' && typeof msCrypto.getRandomValues === 'function' && msCrypto.getRandomValues.bind(msCrypto);
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| 12 |
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| 13 | if (!getRandomValues) {
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| 14 | throw new Error('crypto.getRandomValues() not supported. See https://github.com/uuidjs/uuid#getrandomvalues-not-supported');
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| 15 | }
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| 16 | }
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| 17 |
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| 18 | return getRandomValues(rnds8);
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| 19 | } |
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