@onesy/utils/copy.js

Utils

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const isArray = value => Array.isArray(value);
const isObject = value => typeof value === 'object' && !!value && value.constructor === Object;
// It keeps the references of the methods and classes,
// unlike JSON.stringify usually used for deep simple copy
const copy = (value, values_) => {
    const values = !values_ ? new WeakSet() : values_;
    // Ref circular value
    if (values.has(value))
        return value;
    if (isObject(value) || isArray(value))
        values.add(value);
    if (isArray(value))
        return value.map(item => copy(item, values));
    if (isObject(value)) {
        const newValue = {};
        Object.keys(value).forEach(key => newValue[key] = copy(value[key], values));
        return newValue;
    }
    return value;
};
exports.default = copy;