gun/src/valid.js

A realtime, decentralized, offline-first, graph data synchronization engine.

// Valid values are a subset of JSON: null, binary, number (!Infinity), text,
// or a soul relation. Arrays need special algorithms to handle concurrency,
// so they are not supported directly. Use an extension that supports them if
// needed but research their problems first.
module.exports = function (v) {
  // "deletes", nulling out keys.
  return v === null ||
	"string" === typeof v ||
	"boolean" === typeof v ||
	// we want +/- Infinity to be, but JSON does not support it, sad face.
	// can you guess what v === v checks for? ;)
	("number" === typeof v && v != Infinity && v != -Infinity && v === v) ||
	(!!v && "string" == typeof v["#"] && Object.keys(v).length === 1 && v["#"]);
}