json-syntax-error/index.js

This is a small middleware to resolve syntax errors in your express app

module.exports = function (customResponse) {
  return function (error, req, res, next) {
    if (error instanceof SyntaxError) {
      const defaultErrorMessage = {
        status: 'fail',
        message: 'Invalid JSON: The server is unable to process your request as it is badly malformed!',
      };
      return res.status(400).send(customResponse || defaultErrorMessage);
    }
    return next();
  };
};