53 lines
2.0 KiB
JavaScript
53 lines
2.0 KiB
JavaScript
import { isArray, isPlainObject } from 'is-what';
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function assignProp(carry, key, newVal, originalObject, includeNonenumerable) {
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const propType = {}.propertyIsEnumerable.call(originalObject, key)
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? 'enumerable'
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: 'nonenumerable';
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if (propType === 'enumerable')
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carry[key] = newVal;
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if (includeNonenumerable && propType === 'nonenumerable') {
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Object.defineProperty(carry, key, {
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value: newVal,
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enumerable: false,
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writable: true,
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configurable: true,
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});
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}
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}
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/**
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* Copy (clone) an object and all its props recursively to get rid of any prop referenced of the
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* original object. Arrays are also cloned, however objects inside arrays are still linked.
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*
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* @param target Target can be anything
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* @param [options={}] See type {@link Options} for more details.
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*
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* - `{ props: ['key1'] }` will only copy the `key1` property. When using this you will need to cast
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* the return type manually (in order to keep the TS implementation in here simple I didn't
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* built a complex auto resolved type for those few cases people want to use this option)
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* - `{ nonenumerable: true }` will copy all non-enumerable properties. Default is `{}`
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*
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* @returns The target with replaced values
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*/
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export function copy(target, options = {}) {
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if (isArray(target)) {
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return target.map((item) => copy(item, options));
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}
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if (!isPlainObject(target)) {
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return target;
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}
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const props = Object.getOwnPropertyNames(target);
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const symbols = Object.getOwnPropertySymbols(target);
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return [...props, ...symbols].reduce((carry, key) => {
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// Skip __proto__ properties to prevent prototype pollution
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if (key === '__proto__')
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return carry;
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if (isArray(options.props) && !options.props.includes(key)) {
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return carry;
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}
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const val = target[key];
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const newVal = copy(val, options);
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assignProp(carry, key, newVal, target, options.nonenumerable);
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return carry;
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}, {});
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}
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