| 14 | } |
| 15 | |
| 16 | function deepCloneFallback(value: unknown, seen: Map<unknown, unknown>): unknown { |
| 17 | if (value === null || typeof value !== "object") { |
| 18 | return value; |
| 19 | } |
| 20 | |
| 21 | if (seen.has(value)) { |
| 22 | return seen.get(value); |
| 23 | } |
| 24 | |
| 25 | if (value instanceof Date) { |
| 26 | const cloned = new Date(value.getTime()); |
| 27 | seen.set(value, cloned); |
| 28 | return cloned; |
| 29 | } |
| 30 | |
| 31 | if (Array.isArray(value)) { |
| 32 | const cloned: unknown[] = []; |
| 33 | seen.set(value, cloned); |
| 34 | for (const item of value) { |
| 35 | cloned.push(deepCloneFallback(item, seen)); |
| 36 | } |
| 37 | return cloned; |
| 38 | } |
| 39 | |
| 40 | if (value instanceof Map) { |
| 41 | const cloned = new Map(); |
| 42 | seen.set(value, cloned); |
| 43 | for (const [key, nestedValue] of value.entries()) { |
| 44 | cloned.set( |
| 45 | deepCloneFallback(key, seen), |
| 46 | deepCloneFallback(nestedValue, seen), |
| 47 | ); |
| 48 | } |
| 49 | return cloned; |
| 50 | } |
| 51 | |
| 52 | if (value instanceof Set) { |
| 53 | const cloned = new Set(); |
| 54 | seen.set(value, cloned); |
| 55 | for (const item of value.values()) { |
| 56 | cloned.add(deepCloneFallback(item, seen)); |
| 57 | } |
| 58 | return cloned; |
| 59 | } |
| 60 | |
| 61 | if (value instanceof RegExp) { |
| 62 | const cloned = new RegExp(value.source, value.flags); |
| 63 | cloned.lastIndex = value.lastIndex; |
| 64 | seen.set(value, cloned); |
| 65 | return cloned; |
| 66 | } |
| 67 | |
| 68 | if (value instanceof ArrayBuffer) { |
| 69 | const cloned = value.slice(0); |
| 70 | seen.set(value, cloned); |
| 71 | return cloned; |
| 72 | } |
| 73 | |