// 生成UUID

const generateUUID = ()=>{

    var d = new Date().getTime(); //Timestamp

    var d2 = (performance && performance.now && (performance.now()*1000)) || 0;

    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
        var r = Math.random() * 16; 
        if(d > 0) {
            r = (d + r)%16 | 0;
            d = Math.floor(d/16);
        } else { 
            r = (d2 + r)%16 | 0;
            d2 = Math.floor(d2/16);
        }
        return (c === 'x' ? r : (r & 0x3 | 0x8)).toString(16);
    });
}

export { generateUUID }