HuiruDong

let UUID = () => ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c =>
    (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
)


let random4 = () => {
    return Math.floor((1 + Math.random()) * 0x10000).toString(16).substring(1);
}

let uuid = () => {