How to enable Access-Control-Allow-Origin in json-server?

Question

JavaScript

I have an angular2 frontend and json-server backend . angular2 works on address: localhost:4200 json-server works on address: localhost:3000
The problem is that I don't know how to make json-server give data with header: Access-Control-Allow-Origin: *
This is necessary so that the frontend can get the result of a cross-domain query.
Please tell me how to do it. I don't even understand where the server config is located. I didn't find it in node_modules

Answer 1

// ...
server.use((req, res, next) => {
  res.header('Access-Control-Allow-Origin', '*')
  next()
})
// ...

So you haven't tried it?

Answer 2

I
myself suffer getApiUser() {
let header = new Headers();
header.append('Content-Type', 'application/json; charset=utf-8');
return this.http.get(this.url).map(res => res.json())
}