Last change
on this file since 188ee53 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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File size:
1.1 KB
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[6a3a178] | 1 | "use strict";
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| 2 |
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| 3 | Object.defineProperty(exports, "__esModule", {
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| 4 | value: true
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| 5 | });
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| 6 | exports.default = rng;
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| 7 | // Unique ID creation requires a high quality random # generator. In the browser we therefore
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| 8 | // require the crypto API and do not support built-in fallback to lower quality random number
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| 9 | // generators (like Math.random()).
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| 10 | let getRandomValues;
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| 11 | const rnds8 = new Uint8Array(16);
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| 12 |
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| 13 | function rng() {
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| 14 | // lazy load so that environments that need to polyfill have a chance to do so
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| 15 | if (!getRandomValues) {
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| 16 | // getRandomValues needs to be invoked in a context where "this" is a Crypto implementation. Also,
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| 17 | // find the complete implementation of crypto (msCrypto) on IE11.
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| 18 | 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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| 19 |
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| 20 | if (!getRandomValues) {
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| 21 | throw new Error('crypto.getRandomValues() not supported. See https://github.com/uuidjs/uuid#getrandomvalues-not-supported');
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| 22 | }
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| 23 | }
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| 24 |
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| 25 | return getRandomValues(rnds8);
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| 26 | } |
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