source: trip-planner-front/node_modules/klona/dist/index.mjs@ fa375fe

export function klona(x) {
        if (typeof x !== 'object') return x;

        var k, tmp, str=Object.prototype.toString.call(x);

        if (str === '[object Object]') {
                if (x.constructor !== Object && typeof x.constructor === 'function') {
                        tmp = new x.constructor();
                        for (k in x) {
                                if (tmp.hasOwnProperty(k) && tmp[k] !== x[k]) {
                                        tmp[k] = klona(x[k]);
                                }
                        }
                } else {
                        tmp = {}; // null
                        for (k in x) {
                                if (k === '__proto__') {
                                        Object.defineProperty(tmp, k, {
                                                value: klona(x[k]),
                                                configurable: true,
                                                enumerable: true,
                                                writable: true,
                                        });
                                } else {
                                        tmp[k] = klona(x[k]);
                                }
                        }
                }
                return tmp;
        }

        if (str === '[object Array]') {
                k = x.length;
                for (tmp=Array(k); k--;) {
                        tmp[k] = klona(x[k]);
                }
                return tmp;
        }

        if (str === '[object Set]') {
                tmp = new Set;
                x.forEach(function (val) {
                        tmp.add(klona(val));
                });
                return tmp;
        }

        if (str === '[object Map]') {
                tmp = new Map;
                x.forEach(function (val, key) {
                        tmp.set(klona(key), klona(val));
                });
                return tmp;
        }

        if (str === '[object Date]') {
                return new Date(+x);
        }

        if (str === '[object RegExp]') {
                tmp = new RegExp(x.source, x.flags);
                tmp.lastIndex = x.lastIndex;
                return tmp;
        }

        if (str === '[object DataView]') {
                return new x.constructor( klona(x.buffer) );
        }

        if (str === '[object ArrayBuffer]') {
                return x.slice(0);
        }

        // ArrayBuffer.isView(x)
        // ~> `new` bcuz `Buffer.slice` => ref
        if (str.slice(-6) === 'Array]') {
                return new x.constructor(x);
        }

        return x;
}