var object = { type: "FeatureCollection", features: [{ type: "Feature", properties: {}, geometry: { type: "Point", coordinates: [4.483605784808901, 51.907188449679325] } }, { "type": "Feature", "properties": {}, "geometry": { "type": "Polygon", "coordinates": [ [ [3.974369110811523, 51.907355547778565], [4.173944459020191, 51.86237166892457], [4.3808076710679416, 51.848867725914914], [4.579822414365026, 51.874487141880024], [4.534413416598767, 51.9495302480326], [4.365110733567974, 51.92360787140825], [4.179550508127079, 51.97336560819281], [4.018096293847009, 52.00236546429852], [3.9424146309028174, 51.97681895676649], [3.974369110811523, 51.907355547778565] ] ] } } ] }; var copy = null; // v1 function deepCloneJsonValue(value) { if (value === null || typeof value !== "object") return value; if (Array.isArray(value)) return deepCloneJsonArray(value); return deepCloneJsonObject(value); } function deepCloneJsonObject(obj) { const cloned = { ...obj }; for (const key in obj) { const value = obj[key]; if (typeof value !== "object" || value === null) continue; cloned[key] = Array.isArray(value) ? deepCloneJsonArray(value) : deepCloneJsonObject(value); } return cloned; } function deepCloneJsonArray(arr) { const cloned = []; for (let i = 0, len = arr.length; i !== len; i++) { cloned.push(deepCloneJsonValue(arr[i])); } return cloned; } // v2 function deepCloneJsonValue2(value) { if (value === null || typeof value !== "object") return value; if (Array.isArray(value)) return deepCloneJsonArray2(value); return deepCloneJsonObject2(value); } function deepCloneJsonObject2(obj) { const cloned = { ...obj }; for (const key in cloned) { const value = cloned[key]; if (typeof value !== "object" || value === null) continue; cloned[key] = Array.isArray(value) ? deepCloneJsonArray2(value) : deepCloneJsonObject2(value); } return cloned; } function deepCloneJsonArray2(arr) { const cloned = []; for (let i = 0, len = arr.length; i !== len; i++) { cloned.push(deepCloneJsonValue2(arr[i])); } return cloned; }