When sending a post request to the background, there is only one options request, but no real post request. The get request can succeed. And if you use postman, the post request can also be successful. Do I need to configure anything? code show as below:

When sending a post request:

Send get request:

In the postman environment, post can be successful.

The nodejs code is as follows:

var app = require('express')();
var User = require("./users.js");

app.post('/users/login',function (req,res) {
    res.setHeader('Access-Control-Allow-Origin', '*');
    res.send("foo");
    console.log(res)
})
app.get('/users/login',function (req,res) {
    res.setHeader('Access-Control-Allow-Origin', '*');
    res.send("bar");
})

app.listen('1090','127.0.0.1');

The front desk uses angular’s ​​$http.
What I want to ask is, why are there only these cross-domain options when posting?