Javascript how to parse JSON object dynamically with the given path

Question

I need to fetch an attribute value in a JSON object dynamically, whose structure is unknown, but the path is configured. Please see the below example, thank you.

var perfData = {
    "data": {
        "inner":{
            "TaxiFuel": "TestVal"
        }
    }
}

var path = "data.inner.TaxiFuel";// configure value
console.log(perfData.data.inner.TaxiFuel) // This works fine, Output: TestVal
console.log(perfData.path) //?? How can I use the path variable to get the value