I want to serialize some object. There is Map or some other types which cannot been serialized with JSON.stringify:

JSON.stringify({x:new Map([[1,"some value"]])}) // output: '{"x":{}}'

I tried to use bson, but if key the type of the key is number, will throw an error.

In addition, this object may have circular references.

I found in node.js, v8.serialize() API can solve my problem, I wonder if there are any alternatives in the browser environment.