find_and_replace.js

/**
 * Responds to any HTTP request.
 *
 * @param {!express:Request} req HTTP request context.
 * @param {!express:Response} res HTTP response context.
 */
exports.find_and_replace = (req, res) => {
    let old_string = req.query.old_string || null;
    let text_to_find = req.query.text_to_find || null;
    let text_to_replace = req.query.text_to_replace || null;
    
    if ((old_string == null) || (text_to_find == null) || (text_to_replace == null)) {
        // If any of the fields are empty, return error 400
        // This means there's something wrong with the input.
        res.status(400).send('');
    }
    else {
        res.status(200).send(old_string.replace(text_to_find, text_to_replace));
    }
};

Hii,
Actually i'm looking code in nodejs.
Or
can you please provide me code for API implementation in nodejs for integromat.