Error handling
Syntax#
app.use(function(err, req, res, next) {})// Basic middleware
Parameters#
| Name | Description |
|---|---|
err |
Object with error information |
req |
HTTP request object |
res |
HTTP response object |
next |
function used to start next middleware execution |
| ## Basic sample | |
Unlike other middleware functions error-handling middleware functions have four arguments instead of three: (err, req, res, next). |
Sample:
app.use(function(err, req, res, next) {
console.error(err.stack);
res.status(500).send('Error found!');
});