82 lines
1.5 KiB
JavaScript
82 lines
1.5 KiB
JavaScript
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export function klona(x) {
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if (typeof x !== 'object') return x;
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var k, tmp, str=Object.prototype.toString.call(x);
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if (str === '[object Object]') {
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if (x.constructor !== Object && typeof x.constructor === 'function') {
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tmp = new x.constructor();
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for (k in x) {
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if (x.hasOwnProperty(k) && tmp[k] !== x[k]) {
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tmp[k] = klona(x[k]);
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}
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}
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} else {
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tmp = {}; // null
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for (k in x) {
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if (k === '__proto__') {
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Object.defineProperty(tmp, k, {
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value: klona(x[k]),
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configurable: true,
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enumerable: true,
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writable: true,
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});
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} else {
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tmp[k] = klona(x[k]);
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}
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}
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}
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return tmp;
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}
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if (str === '[object Array]') {
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k = x.length;
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for (tmp=Array(k); k--;) {
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tmp[k] = klona(x[k]);
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}
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return tmp;
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}
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if (str === '[object Set]') {
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tmp = new Set;
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x.forEach(function (val) {
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tmp.add(klona(val));
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});
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return tmp;
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}
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if (str === '[object Map]') {
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tmp = new Map;
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x.forEach(function (val, key) {
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tmp.set(klona(key), klona(val));
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});
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return tmp;
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}
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if (str === '[object Date]') {
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return new Date(+x);
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}
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if (str === '[object RegExp]') {
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tmp = new RegExp(x.source, x.flags);
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tmp.lastIndex = x.lastIndex;
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return tmp;
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}
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if (str === '[object DataView]') {
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return new x.constructor( klona(x.buffer) );
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}
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if (str === '[object ArrayBuffer]') {
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return x.slice(0);
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}
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// ArrayBuffer.isView(x)
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// ~> `new` bcuz `Buffer.slice` => ref
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if (str.slice(-6) === 'Array]') {
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return new x.constructor(x);
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}
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return x;
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}
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