45 lines
1.5 KiB
JavaScript
45 lines
1.5 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
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const isUnsafeProperty = require('../_internal/isUnsafeProperty.js');
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const isPlainObject = require('../predicate/isPlainObject.js');
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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.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.isPlainObject(sourceValue)) {
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if (isPlainObject.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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exports.mergeWith = mergeWith;
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