js前端获取GUID （全球唯一标识符）

https://blog.youkuaiyun.com/qq_37568049/article/details/80736305

js获取guid

var tid = guid();
/**
 *获取id
 */
function guid() {
    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
        var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);
        return v.toString(16);
    });
}