Variable: QR\_CODE\_MIN\_QUIET\_ZONE

const QR_CODE_MIN_QUIET_ZONE: 4 = 4;

Defined in: shared/qr-code/schemas.ts:19

ISO/IEC 18004 requires a light margin of at least four modules on every side. Scanners use it to find the symbol's edges; shrinking it is one of the two most common reasons a visually-perfect QR code won't scan (the other being low contrast).