31 lines
945 B
JavaScript
31 lines
945 B
JavaScript
/* eslint-disable prefer-const */
|
|
|
|
var index = 0;
|
|
var genNanoid = function genNanoid() {
|
|
var t = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 21;
|
|
if (typeof window === 'undefined') return (index += 1).toFixed(0);
|
|
if (!window.crypto) return (index += 1).toFixed(0);
|
|
var e = '',
|
|
r = crypto.getRandomValues(new Uint8Array(t));
|
|
// eslint-disable-next-line no-param-reassign
|
|
for (; t--;) {
|
|
var n = 63 & r[t];
|
|
e += n < 36 ? n.toString(36) : n < 62 ? (n - 26).toString(36).toUpperCase() : n < 63 ? '_' : '-';
|
|
}
|
|
return e;
|
|
};
|
|
|
|
/**
|
|
* 生成uuid，如果不支持 randomUUID，就用 genNanoid
|
|
*
|
|
* @returns string
|
|
*/
|
|
export var nanoid = function nanoid() {
|
|
if (typeof window === 'undefined') return genNanoid();
|
|
// @ts-ignore
|
|
if (window.crypto && window.crypto.randomUUID && typeof crypto.randomUUID == 'function') {
|
|
// @ts-ignore
|
|
return crypto.randomUUID();
|
|
}
|
|
return genNanoid();
|
|
}; |