pg.connect not a function?

Question

There appears to be a lot of documentation (e.g. https://devcenter.heroku.com/articles/heroku-postgresql#connecting-in-node-js, but also elsewhere including this site) indic

Answer 1

var express = require('express');
var app = express();
const pgp = require('pg-promise')();
var connectionString = "";
var parse = require('pg-connection-string').parse;

try {
    var connectionString = "postgres://USERNAME:@localhost:5432/DBNAME";
    var config = parse(connectionString);
    config.password = "PASSWORD";
    var dbcon = pgp(config);
    app.set('dbCon', dbcon);
} 
catch (error) {
    console.log("DB error")
} 

module.exports = app;