How to pass BLOB value to mavo?

[GalinhaLX]

Hi

While uploading a file, I get a BLOB
I'm trying to pass this BLOB to Mavo

To achieve that, I use javascript,
to update the 'scr' attribute with BLOB adress

(I also tried to pass it to the innerHTML of a temporary property, and then passing this temp property to Mavo)

-> but Mavo doesn't take it into consideration

What should be the way to pass this BLOB to Mavo?

see my codepen here
or with another library here