Sha256: 5ee78b2cf0206f6814549559f0bc92aec5b5f97c9e1c4b4be10d086e96409644
Contents?: true
Size: 938 Bytes
Versions: 39
Compression:
Stored size: 938 Bytes
Contents
// Unique ID creation requires a high quality random # generator. In the
// browser this is a little complicated due to unknown quality of Math.random()
// and inconsistent support for the `crypto` API. We do the best we can via
// feature-detection
var rng;
var crypto = global.crypto || global.msCrypto; // for IE 11
if (crypto && crypto.getRandomValues) {
// WHATWG crypto RNG - http://wiki.whatwg.org/wiki/Crypto
var rnds8 = new Uint8Array(16);
rng = function whatwgRNG() {
crypto.getRandomValues(rnds8);
return rnds8;
};
}
if (!rng) {
// Math.random()-based (RNG)
//
// If all else fails, use Math.random(). It's fast, but is of unspecified
// quality.
var rnds = new Array(16);
rng = function() {
for (var i = 0, r; i < 16; i++) {
if ((i & 0x03) === 0) r = Math.random() * 0x100000000;
rnds[i] = r >>> ((i & 0x03) << 3) & 0xff;
}
return rnds;
};
}
module.exports = rng;
Version data entries
39 entries across 38 versions & 4 rubygems