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31 lines
980 B
TypeScript
31 lines
980 B
TypeScript
/**
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* Performs a deep merge of objects and returns new object.
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* Does not modify objects (immutable).
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* @see https://stackoverflow.com/a/48218209
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*
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* @param objects - Objects to merge
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* @returns New object with merged key/values
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*/
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export function merge(...objects: ReadonlyArray<any>): object {
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const isObject = (obj: unknown) => obj && typeof obj === 'object';
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return objects.reduce((prev, obj) => {
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if (obj) {
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Object.keys(obj).forEach(key => {
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const pVal = prev[key];
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const oVal = obj[key];
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if (Array.isArray(pVal) && Array.isArray(oVal)) {
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// prev[key] = pVal.concat(...oVal);
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prev[key] = oVal;
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} else if (isObject(pVal) && isObject(oVal)) {
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prev[key] = merge(pVal, oVal);
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} else {
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prev[key] = oVal;
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}
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});
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}
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return prev;
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}, {});
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} |