You can also use util
library:
const util = require("util")
> myObject = {1:2, 3:{5:{6:{7:8}}}}
{ '1': 2, '3': { '5': { '6': [Object] } } }
> util.inspect(myObject, {showHidden: true, depth: null})
"{\n '1': 2,\n '3': { '5': { '6': { '7': 8 } } }\n}"
> JSON.stringify(myObject)
'{"1":2,"3":{"5":{"6":{"7":8}}}}'
original source : https://stackoverflow.com/a/10729284/8556340