Create Async Wrapper for Express Route Handlers

Express.js

Node.js

Technical Specification

Create a helper function wrapAsync that wraps async route handlers and forwards errors to next.

Input/Output Samples

Input:app.get('/users', wrapAsync(async..))

Output:Errors go to error handler

Optimal Logic Path

function wrapAsync(fn) {
  return function (req, res, next) {
    Promise.resolve(fn(req, res, next)).catch(next);
  };
}

module.exports = { wrapAsync };

Architectural Deep-Dive

We avoid repeating try/catch in every async route by centralizing async error forwarding.