How to get response from server without reload on node.js?

Question

Node.js

How to get response from server without reload on node.js

router.post('/send', function(req, res, next) {
     res.json({status: 'Ваше письмо было отправлено!'});
});

I'm using express
Let's say I submitted a form and got a json response. How can it be read and used on the client side? Let's say that without a reboot, a window with an answer appears.

Answer 1

async function someAsyncRequest() {
  const result = await fetch('https://jsonplaceholder.typicode.com/todos/1');
  const json = await result.json();
  console.log(json);
}

Try it out: https://jsfiddle.net/ajrbcxpm/