Decorator function

const before = function (fn, beforeFn) {
    return function () {
        beforeFn.apply(this, arguments)
        return fn.apply(this, arguments)
    }
}

const after = function (fn, afterFn) {
    return function () {
        const __ = fn.apply(this, arguments)
        afterFn.apply(this, arguments)
        return __
    }
}
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