node-postgres reconnect when connection failed [closed] - node.js

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This is my db connection code of nodejs project, in some situation my db is down (not working), i want to try reconnecting to db, but i don't know how to that, please help me
const { Client } = require('pg');
const postgis = new Client({
user: process.env.PGUSER,
host: process.env.PGHOST,
database: process.env.PGDATABASE,
password: process.env.PGPASSWORD,
port: process.env.PGPORT
});
console.log(`Connecting to PostGIS database ${process.env.PGDATABASE} on: ${process.env.PGHOST}:${process.env.PGPORT}`);
postgis.connect()
.then(() => {
console.log(`PostGIS connected to: ${process.env.PGDATABASE} on: ${process.env.PGHOST}:${process.env.PGPORT}`)
})
.catch((e) => {
// console.error(`PostGIS connection error: ${e}`)
setTimeout(function () {
console.log("entering again")
postgis.connect();
}, 10000);
});
error:
(node:10299) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:10299) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Answer 1

You can handle it in catch block and reconnect to posgres
setTimeout(function () {
postgis.connect();
}, 10000);