Created
December 30, 2021 13:43
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v4 UUID generation using crypto.getRandomValues
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| export default function () { | |
| // returns an RFC 4122 compliant UUID using the crypto API | |
| // Based on https://gist.github.com/bentranter/ed524091170137a72c1d54d641493c1f with | |
| // a fix to have padding for numbers < 16 | |
| // get sixteen unsigned 8 bit random values | |
| let u = window.crypto.getRandomValues(new Uint8Array(16)); | |
| // set the version bit to v4 | |
| u[6] = (u[6] & 0x0f) | 0x40; | |
| // set the variant bit to "don't care" (yes, the RFC | |
| // calls it that) | |
| u[8] = (u[8] & 0xbf) | 0x80; | |
| // hex encode them and add the dashes | |
| let uid = ''; | |
| for (let i = 0; i < u.length; i++) { | |
| if (u[i] < 16) { | |
| uid += '0'; | |
| } | |
| uid += u[i].toString(16); | |
| if ([3, 5, 7, 9].indexOf(i) > -1) { | |
| // includes() is not supported in IE | |
| uid += '-'; | |
| } | |
| } | |
| return uid; | |
| } |
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