export function uuid(len = 32, radix = 16) {
|
const chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
|
let uuid = [],
|
i;
|
radix = radix || chars.length;
|
|
if (len) {
|
// Compact form
|
for (i = 0; i < len; i++) uuid[i] = chars[0 | (Math.random() * radix)];
|
} else {
|
// rfc4122, version 4 form
|
let r;
|
|
// rfc4122 requires these characters
|
uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
|
uuid[14] = '4';
|
|
// Fill in random data. At i==19 set the high bits of clock sequence as
|
// per rfc4122, sec. 4.1.5
|
for (i = 0; i < 36; i++) {
|
if (!uuid[i]) {
|
r = 0 | (Math.random() * 16);
|
uuid[i] = chars[i === 19 ? (r & 0x3) | 0x8 : r];
|
}
|
}
|
}
|
|
return uuid.join('');
|
}
|
