aa="121"
"121"
b=new Blob([aa])
Blob(3) {size: 3, type: ""}
window.URL.createObjectURL(b)
"blob:https://gis01.leechg.com/b8c1fef4-9abd-45af-ad51-b88bef898e76"
aa="121"
"121"
b=new Blob([aa])
Blob(3) {size: 3, type: ""}
window.URL.createObjectURL(b)
"blob:https://gis01.leechg.com/b8c1fef4-9abd-45af-ad51-b88bef898e76"