db.put(key, undefined....) will give you problems. This codec fixes it.
It simply coerces undefined to null so it will encode properly. Note that when it decodes it will be null instead of undefined.
To use it, simply change
var db = level(... {
valueEncoding: "json"
})To this
var db = level(... {
valueEncoding: require("level-json-coerce-null")
})It's quite annoying that javascript has 2 ways of representing "nothing".
null- an object that is meant to represent nothingundefined- the true nothing (it's also a re-assignable identifier)
WAT!
MIT