AlgoDaily - Implement JSON.stringify

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function stringify(data) {
    if (typeof data === "string") {
        return `"${data}"`;
    }
    if (typeof data === "function") {
        return undefined;
    }
    if (data === Infinity || data === -Infinity || data === null
        || data === undefined || typeof data === "symbol") {
        return "null";
    }
    if (typeof data === "number" || typeof data === "boolean") {
        return `${data}`;
    }
​
    if (data instanceof Date) {
        return `"${data.toISOString()}"`;
    }
    if (Array.isArray(data)) {
        const arr = data.map((el) => stringify(el));
        return `[${arr.join(",")}]`;
    }
    if (typeof data === "object") {
        const arr = Object.entries(data).reduce((acc, [key, value]) => {
            if (value === undefined) {
                return acc;
            }

OUTPUT

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