Question

I know the method to convert a JS object into a JSON string by using JSON.stringify(object) method. How can I encode a string object into JSON?

Answer 1

You can’t convert a string into JSON. The outermost data type in JSON must be an object or an array.

See the specification:

JSON Grammar

A JSON text is a sequence of tokens. The set of tokens includes
six structural characters, strings, numbers, and three literal
names.

A JSON text is a serialized object or array.

You could wrap the string in an object or array and then serialise that:

JSON.stringify([myString]);
JSON.stringify({foo: myString});

Whatever processed it would have to know that after parsing the JSON it would have to extract the string from it though.