HttpErrorPages/examples/express.js

const _express = require('express');
const _webapp = _express();

// use require('http-error-pages') for regular apps!
const _httpErrorPages = require('../lib/main');

async function bootstrap(){
    // demo handler
    _webapp.get('/', function(req, res){
        res.type('.txt').send('HttpErrorPages Demo');
    });

    // throw an 403 error
    _webapp.get('/my403error', function(req, res, next){
        const myError = new Error();
        myError.status = 403;
        next(myError);
    });

    // throw an internal error
    _webapp.get('/500', function(req, res){
        throw new Error('Server Error');
    });

    // use http error pages handler (final statement!)
    // because of the asynchronous file-loaders, wait until it has been executed
    await _httpErrorPages.express(_webapp, {
        lang: 'en_US',
        footer: 'Hello <strong>World</strong>',
        error: 'Error %code%',
        page_title: "We've got some trouble | %code% - %title%",
    });

    // start service
    _webapp.listen(8888);
}

// invoke bootstrap operation
bootstrap()
    .then(function(){
        console.log('Running Demo on Port 8888');
    })
    .catch(function(e){
        console.error(e);
    });