Как настроить CORS? var createError = require("http-errors"); var express = require("express"); var path

= require("path");
var cookieParser = require("cookie-parser");
var logger = require("morgan");

var adminRouter = require("./routes/admin");
var usersRouter = require("./routes/users");

var app = express();

// view engine setup
app.set("views", path.join(__dirname, "views"));
app.set("view engine", "pug");

app.use(logger("dev"));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, "public")));
app.use("/admin", adminRouter);
app.use("/users", usersRouter);

// res.setHeader('Access-Control-Allow-Origin', '*');
app.use(function(req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header(
"Access-Control-Allow-Headers",
"Origin, X-Requested-With, Content-Type, Accept"
);
next();
});

// catch 404 and forward to error handler
app.use(function(req, res, next) {
next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get("env") === "development" ? err : {};

// render the error page
res.status(err.status || 500);
res.render("error");
});

module.exports = app;

https://expressjs.com/en/resources/middleware/cors.html