41 lines
1.3 KiB
JavaScript
41 lines
1.3 KiB
JavaScript
import { isUnsafeProperty } from '../_internal/isUnsafeProperty.mjs';
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import { isPlainObject } from '../predicate/isPlainObject.mjs';
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function mergeWith(target, source, merge) {
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const sourceKeys = Object.keys(source);
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for (let i = 0; i < sourceKeys.length; i++) {
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const key = sourceKeys[i];
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if (isUnsafeProperty(key)) {
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continue;
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}
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const sourceValue = source[key];
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const targetValue = target[key];
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const merged = merge(targetValue, sourceValue, key, target, source);
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if (merged !== undefined) {
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target[key] = merged;
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}
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else if (Array.isArray(sourceValue)) {
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if (Array.isArray(targetValue)) {
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target[key] = mergeWith(targetValue, sourceValue, merge);
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}
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else {
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target[key] = mergeWith([], sourceValue, merge);
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}
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}
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else if (isPlainObject(sourceValue)) {
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if (isPlainObject(targetValue)) {
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target[key] = mergeWith(targetValue, sourceValue, merge);
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}
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else {
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target[key] = mergeWith({}, sourceValue, merge);
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}
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}
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else if (targetValue === undefined || sourceValue !== undefined) {
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target[key] = sourceValue;
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}
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}
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return target;
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}
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export { mergeWith };
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