Optionalformat
format?:
| "image/png"
| "pdf"
| "svg"
| "application/pdf"
| "png"
| "jpg"
| "image/jpg"
| "image/svg+xml"
| `image/png@${number}x`
| `pdf@${number}x`
| `svg@${number}x`
| `application/pdf@${number}x`
| `png@${number}x`
| `jpg@${number}x`
| `image/jpg@${number}x`
| `image/svg+xml@${number}x`
The image format to use.