new-88live/core/kit/random-id.js

const CHARSET = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('')

export function createRandomId(length = 32, prefixWithU = true, radix = null) {
	const base = radix || CHARSET.length
	const chars = []
	if (length) {
		for (let i = 0; i < length; i++) {
			chars.push(CHARSET[Math.floor(Math.random() * base)])
		}
	} else {
		chars[8] = chars[13] = chars[18] = chars[23] = '-'
		chars[14] = '4'
		for (let i = 0; i < 36; i++) {
			if (!chars[i]) {
				const r = Math.floor(Math.random() * 16)
				chars[i] = CHARSET[i === 19 ? (r & 0x3) | 0x8 : r]
			}
		}
	}
	const joined = prefixWithU && length ? 'u' + chars.join('') : chars.join('')
	return joined
}