const size = 256
let index = size
let buffer: string
export function uid(length = 11) {
if (!buffer || index + length > size * 2) {
buffer = ''
index = 0
for (let i = 0; i < size; i++) {
buffer += ((256 + Math.random() * 256) | 0).toString(16).substring(1)
}
}
return buffer.substring(index, index++ + length)
}