How to pass temporary url

I have set up and uploader that returns a url and this works well. However, I don't want to have to upload the image each time the user inserts or removes. I want to use a temporary url

```
let tempFileUrl = URL.createObjectURL(file);
```
This creates a url: "blob:http://localhost......". This works when working with DOM elements but If I pass this to the image `uploadByFile` result

`
return {
success: 1,
file: tempFileUrl
}
`

It just keeps loading