43 lines
937 B
JavaScript
Executable File
43 lines
937 B
JavaScript
Executable File
/**
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* Shallow copy any JS value if it makes sense.
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* @param {*} value
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* @returns {*}
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*/
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export default function shallowCopy(value) {
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if (value === null || typeof value !== "object") {
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// primitives, functions, symbols
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return value;
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}
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if (Array.isArray(value)) {
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return value.slice();
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}
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if (value instanceof Date) {
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return new Date(value.getTime());
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}
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if (value instanceof Map) {
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return new Map(value);
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}
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if (value instanceof Set) {
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return new Set(value);
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}
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// Plain objects
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if (Object.getPrototypeOf(value) === Object.prototype) {
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return Object.assign({}, value);
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}
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if (typeof value?.clone === "function") {
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return value.clone();
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}
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// Fallback: clone prototype + own props
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return Object.create(
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Object.getPrototypeOf(value), //
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Object.getOwnPropertyDescriptors(value),
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);
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}
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