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deep merge
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| function isPlainObject(item: unknown): item is Record<string, unknown> { | |
| return item && (item as object).constructor === Object | |
| } | |
| function filterProto([key, value]: [string, unknown]) { | |
| // Avoid prototype pollution | |
| return key !== '__proto__' | |
| } | |
| const deepmerge = ( | |
| target: unknown, | |
| source: unknown, | |
| options = { clone: true } | |
| ) => { | |
| if (!isPlainObject(target) || !isPlainObject(source)) { | |
| console.warn('Please, make sure that objects are passed as parameters') | |
| return {} | |
| } | |
| const output = options.clone ? { ...target } : target | |
| // TODO: reduce complexity | |
| Object.entries(source).filter(filterProto).forEach(([key, value]) => { | |
| if (isPlainObject(value) && key in target) { | |
| output[key] = deepmerge(target[key], value, options) | |
| } else { | |
| output[key] = value | |
| } | |
| }) | |
| return output | |
| } | |
| export { deepmerge } |
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