Convert Javascript Object (incl. functions) to String

Question

Hey, Im trying to convert specific javascript objects to a String. So far I\'m working with json2.js. As soon as my Object contain functions, those functions are stripped. I

Answer 1

I made a improved version based on the @SIMDD function, to convert all types of objects to string.

Typescript code:

function anyToString(valueToConvert: unknown): string {
    if (valueToConvert === undefined || valueToConvert === null) {
        return valueToConvert === undefined ? "undefined" : "null";
    }
    if (typeof valueToConvert === "string") {
        return `'${valueToConvert}'`;
    }
    if (
        typeof valueToConvert === "number" ||
        typeof valueToConvert === "boolean" ||
        typeof valueToConvert === "function"
    ) {
        return valueToConvert.toString();
    }
    if (valueToConvert instanceof Array) {
        const stringfiedArray = valueToConvert
            .map(property => anyToString(property))
            .join(",");
        return `[${stringfiedArray}]`;
    }
    if (typeof valueToConvert === "object") {
        const stringfiedObject = Object.entries(valueToConvert)
            .map((entry: [string, unknown]) => {
                return `${entry[0]}: ${anyToString(entry[1])}`;
            })
            .join(",");
        return `{${stringfiedObject}}`;
    }
    return JSON.stringify(valueToConvert);
}

Vanilla Javascript code:

function anyToString(valueToConvert) {
    if (valueToConvert === undefined || valueToConvert === null) {
        return valueToConvert === undefined ? "undefined" : "null";
    }
    if (typeof valueToConvert === "string") {
        return `'${valueToConvert}'`;
    }
    if (typeof valueToConvert === "number" ||
        typeof valueToConvert === "boolean" ||
        typeof valueToConvert === "function") {
        return valueToConvert.toString();
    }
    if (valueToConvert instanceof Array) {
        const stringfiedArray = valueToConvert
            .map(property => anyToString(property))
            .join(",");
        return `[${stringfiedArray}]`;
    }
    if (typeof valueToConvert === "object") {
        const stringfiedObject = Object.entries(valueToConvert)
            .map((entry) => {
            return `${entry[0]}: ${anyToString(entry[1])}`;
        })
            .join(",");
        return `{${stringfiedObject}}`;
    }
    return JSON.stringify(valueToConvert);
}

ATENTION!

I am using the function Object.entries(), winch currently is a draft. So if you are not using Babel or typescript to transpile your code, you can replace it with a for loop or the Object.keys() method.