SOURCE

// new
const myNew = function (constructor, ...args) {
    if (typeof constructor !== 'function')  {
        throw new TypeError('construtor must be FUNCTION type')
    } else {
        const ret = {}
        Object.setPrototypeOf(ret, constructor.prototype)
        constructor.call(ret, ...args)
        return ret
    }
}

obj1 = myNew(function (name) {
    this.name = name
}, 'Ben')

console.log(obj1)