send-notification.js

const EXPO_HOST = "https://exp.host/--/api/v2/push/send";

function sendNotification(token, title, body) {
  return fetch(EXPO_HOST, {
    body: JSON.stringify({
      to: token,
      title: title,
      body: body
    }),
    headers: {
      "Content-Type": "application/json",
    },
    method: "POST",
  });
}