lỗi access-control-allow-origin và cách khắc phục

lỗi access-control-allow-origin và cách khắc phục trong express, nodejs

app.all('*', function(req, res, next) {
  res.setHeader('Access-Control-Allow-Origin', '*')
  res.setHeader('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS')
  res.setHeader('Access-Control-Allow-Headers', 'Content-type,Accept,X-Access-Token,X-Key')
  if (req.method == 'OPTIONS') {
    res.status(200).end()
  } else {
    next()
  }
})

Async await in javascript

group by property javascript use reduce

mongoose connect express

Kiểm tra định dạng email bằng Javascript

Rest Operator for Objects

Now we can use rest on the properties of an Object. It allows us to explicitly extract certain named variables, and assign any uncalled variables into a catchall Object.