Examples of how to parse (unmarshal) and stringify (marshal) JSON.

Node.js

let jsonstr = '{"foo":"bar"}';

let parsed = JSON.parse(jsonstr);
console.log(parsed);

jsonstr = JSON.stringify(parsed);
console.log(jsonstr);

Output

{ foo: 'bar' }
{"foo":"bar"}

Go

package main

import (
	"encoding/json"
	"fmt"
)

type T struct {
	Foo string `json:"foo"`
}

func main() {
	jsonstr := `{"foo":"bar"}`

	t := new(T)
	err := json.Unmarshal([]byte(jsonstr), t)
	if err != nil {
		panic(err)
	}

	fmt.Println(t)

	marshalled, err := json.Marshal(t)
	jsonstr = string(marshalled)
	fmt.Println(jsonstr)
}

Output

&{bar}
{"foo":"bar"}

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