The following code snippet is from the v4.js file located inside the uuid folder within Angular's node_modules:
var rng = require('./lib/rng');
var bytesToUuid = require('./lib/bytesToUuid');
function v4(options, buf, offset) {
var i = buf && offset || 0;
if (typeof(options) == 'string') {
buf = options == 'binary' ? new Array(16) : null;
options = null;
}
options = options || {};
var rnds = options.random || (options.rng || rng)();
// Setting bits for version and `clock_seq_hi_and_reserved` as per 4.4
rnds[6] = (rnds[6] & 0x0f) | 0x40;
rnds[8] = (rnds[8] & 0x3f) | 0x80;
// Copying bytes to buffer if provided
if (buf) {
for (var ii = 0; ii < 16; ++ii) {
buf[i + ii] = rnds[ii];
}
}
return buf || bytesToUuid(rnds);
}
module.exports = v4;
To import the v4 function, I use the statement:
import { v4 as uuid } from 'uuid';
I recently discovered that there are two ways to call the v4 function:
You can either use:
uuid.v4();
Or simply:
uuid();
It might be surprising how uuid() still calls the v4 function.