NodeJs + Request-promise - error catching - node.js

Question

I'm having trouble with error handling with my function in my bot for Discord. What I've got right now is a command that scraps information from a website, I want to make it so if there is an error (404), the user will get some feedback. How would I go about doing this? Right now I currently have something, but I'm not sure what I'm doing wrong. Here is a snippet of code:
//modules used
const rp = require('request-promise-native');
const errors = require('request-promise/errors');
const cheerio = require('cheerio');
if (message.content.startsWith(prefix + 'latest')) {
//website url variables
const website_domain = "https://hypebeast.com/";
let website_path = args[0];
let website_url = website_domain + website_path;
//extra arguments variable
let extra_arg = args.slice(1).join(" ");
if (extra_arg.length > 0) {
message.reply('too many arguments! Please refer to `h.help` for correct usage.');
} else {
//opening url and scrapping elements
function scrapData(website_url) {
return rp(website_url)
.then(body => {
let items = [],
$ = cheerio.load(body).catch(errors.StatusCodeError, function (reason) {
console.log(reason);
});
//web scrapping here
$('.post-box').each(function() {
let title = $(this).find($('.title h2 span')).first().text(),
caption = $(this).find($('.post-box-excerpt p')).first().text(),
article_url = $(this).find($('.col-hb-post-image a')).first().attr('href'),
thumbnail_long = $(this).find($('.thumbnail img')).first().attr('src');
//adding title, caption, etc to list
items.push({title, caption, article_url, thumbnail_long});
//check items in console
console.log(items);
})
return items;
})
}

Answer 1

I have just modified your code little try this below code.
//modules used
const rp = require('request-promise-native');
const errors = require('request-promise/errors');
const cheerio = require('cheerio');
if (message.content.startsWith(prefix + 'latest')) {
//website url variables
const website_domain = "https://hypebeast.com/";
let website_path = args[0];
let website_url = website_domain + website_path;
//extra arguments variable
let extra_arg = args.slice(1).join(" ");
if (extra_arg.length > 0) {
message.reply('too many arguments! Please refer to `h.help` for correct usage.');
} else {
var options = {
uri: website_url,
transform: function (body) {
return cheerio.load(body);
}
};
rp(options)
.then(function ($) {
// Process html like you would with jQuery...
$('.post-box').each(function() {
let title = $(this).find($('.title h2 span')).first().text(),
caption = $(this).find($('.post-box-excerpt p')).first().text(),
article_url = $(this).find($('.col-hb-post-image a')).first().attr('href'),
thumbnail_long = $(this).find($('.thumbnail img')).first().attr('src');
//adding title, caption, etc to list
items.push({title, caption, article_url, thumbnail_long});
//check items in console
console.log(items);
});
})
.catch(function (err) {
console.log(err);
});
}