express middleware error code example

Example 1: express error middleware

function errorHandler (err, req, res, next) {
  if (res.headersSent) {
    return next(err)
  }
  res.status(500)
  res.render('error', { error: err })
}

Example 2: put route error express

//don't forget the "/" in the route targeted URL : 
app.put("/collection/:id", (req, res)=>{
	//route content
})